ummu afeera zainulabid, lau chee lan, cheong xiong khee, asiyah nordin, fatin farahani ramzah, ramli ramliza, sharifah azura salleh, neoh hui-min, ummu salamah faisal, periyasamy petrick .  (2026).  recognising borderline oxacillin-resistant staphylococcus aureus in haemodialysis-associated bacteraemia.  - 12th international congress of the asia pacific society of infection control.  . 

kausalyaa krishnabalan, xiong khee cheong, najma kori, ramliza ramli, chee lan lau, ummu afeera zainulabid, mohamad shafiq ,mohd ibrahim, shamsul azhar shah, sharifah azura salleh,,petrick periyasamy.  (2026).  clinical characteristics and outcomes of carbapenem-resistant enterobacteriaceae bacteraemia: a single-center retrospective study.  - 12th international congress of the asia pacific society of infection control.  . 

xiong khee cheong, ummu afeera zainulabid, najma kori, chuan hun ding, nor aimi abdul rahman, asrul abdul wahab, azlina ibrahim, petrick periyasamy.  (2026).  triad of cryptococcal dissemination: concomitant fungaemia, meningitis, and scalp osteomyelitis in immunocompetent host.  - escmid global congress 2026 .  . 

xiong khee cheong, ummu afeera zainulabid, najma kori, azlina ibrahim, noor zetti zainol rashid, muhammad nazri aziz, petrick periyasamy.  (2026).  challenging diagnosis: shotgun metagenomic sequencing uncovers concurrent disseminated tuberculosis and nocardial abscess in hiv.  - escmid global congress 2026.  . 

xiong khee cheong, yong shen tan, wei hao kok, najma kori, yin ping wong, azlina ibrahim, ummu afeera zainulabid, petrick periyasamy.  (2026).  rectal mass mimicking malignancy: cytomegalovirus colitis in an immunocompetent host.  - 36th european congress of clinical microbiology and infectious diseases.  . 

petrick periyasamy, faiz ruzman, sharifa ezat wan puteh.  (2026).  malaysia better prepared for nipah virus, but early detection remains tough.  - the sun.  . 

nurul dayana zainuddin, siti norlia othman, norzuriza mohd rais, hui-min neoh, meng ling moi, najma kori, petrick periyasamy and nor azila muhammad azami.  (2025).  differences in titers of neutralizing antibody in primary and secondary dengue patients admitted to a teaching hospital in malaysia.  - postgraduate research conference 2025.  . 

nurul syafiqah nabila abdul kadir, siti norlia othman, norzuriza mohd rais, hui-min neoh, meng ling moi, najma kori, petrick periyasamy and nor azila muhammad azami.  (2025).  association between viral factors and clinical manifestations observed in dengue patients in malaysia.  - postgraduate research conference 2025.  . 

xiong khee cheong, nik nuratiqah nik abeed, najma kori, boon hau ng, andrea ban yu-lin, ilham ismail, mahrunissa mahadi, petrick periyasamy .  (2025).  triple hits: concurrent pulmonary kaposi’s sarcoma, tuberculosis, and pneumocystis jirovecii pneumonia in a newly diagnosed hiv patient.  - 29th congress of apsr.  . 

muhamaad razis ismail, dr petrick @ ramesh k periyasamy.  (2025).  budak senang kena.  - my metro.  . 

u.a. zainulabid , x.k. cheong, n. kori, p. periyasamy, m.z. abdul muien, r. musily, i. mohamed rose, n. zaidan, n. ismail ,h.m. neoh , h.m. gan .  (2025).  rapid nanopore sequencing as a key diagnostic tool in adrenal histoplasmosis after a year of uncertainty.  - escmid global abstract book 2025.  2561 - 2562. 

ummu afeera zainulabid, cheong xiong khee, najma kori, jasmine kueh wui thing, imran zainuddin, isa mohamed rose , ramliza ramli, muhammad zahid abdul muien, siti roszilawati ramli , petrick periyasamy.  (2025).  no one taught you this: bartonella henselae – a forgotten cause of hepatosplenomegaly in textbooks.  - 4th asia pacific rickettsial conference.  60 - 60. 

petrick periyasamy, kirtinee ramesh.  (2025).  leptospirosis not minor illness, public warned.  - the sun .  . 

putri sabrina mohamed yusoff , norsyahida arifin , nurul shazalina zainudin ,nurulhasanah othman , rahmah noordin , asmahani azira abdu sani , wan mohd aizat wan kamaruddin , petrick periyasamy , wong kon ken , emelia osman .  (2025).  pengenalpastian dan penghasilan penanda diagnostik protein enterocytozoon bieneusi (b7xj00) untuk mikosporidiosis tersebar.  - simposium parasitologi & perubatan tropika 2025.  . 

xiong khee cheong, ummu afeera.zainulabid, boon hau ng, nik nuratiqah nik abeed, andrea yu-lin ban, najma kori, chuan hun ding, nurezzaty mohammad kazmin, petrick periyasamy .  (2025).  therapeutic challenges: a case of cryptococcal pneumonia in an immunocompetent host.  - asia pacific congress of clinical microbiology and infection program book .  1 - 100. 

darshini sivanesan, nur ezzaty mohammad kazmin, petrick periyasamy, ummu afeera zainulabid, xiong khee cheong.  (2025).  the great mimicker: osteoarticular sporotrichosis masquerading as tuberculosis.  - asia pacific congress of clinical microbiology and infection 2025 .  . 

petrick periyasamy, meera murugesan.  (2025).  superbugs - when minor infections become untreatable.  - new straits times .  . 

petrick periyasamy.  (2025).  antimicrobial resistance in malaysia: how a simple sore throat can worsen a global crisis.  - code blue.  . 

zainina zainal abidin, zetti zainol rashid, umi kalsom ali, wong kon ken, petrick periyasamy, mohd noor mat isa.  (2025).  sars-cov-2 infection in hiv patients: duration and whole genome sequencing.  - 2nd apic-adva summit on infectious diseases and immunization 2025, singapore.  . 

shanthi krishnasamy, mok jia wai, abu kassim nur fadzilah, roslan wan nur faiqah, you yee xing, periyasamy petrik@ramesh, chew deborah chia hsin, siah kewin tein ho.  (2024).  food avoidance, covid-19 infection and post-infectious functional gastrointestinal disorders: is there a link?.  - asia pacific digestive week.  . 

shalene palansamy, xiong khee cheong, ummu afeera .zainulabid , boon cong beh, najma kori, juen kiem tan, ilham ismail 1,2 ,mahrunissa mahadi, noranati zulkifli chia, asiyah nordin, petrick periyasamy.  (2024).  listeria’s deadly descent endocarditis: clinical course and management dilemma .  - annual scientific congress 2024 .  . 

ummu afeera zainulabid, fara rahidah hussin, cheong xiong khee, izreena ismail, mohan arumugam, stephen chew jink yang, reena rahayu md zin, ikmal hisyam bakrin, sakthiswary rajalingham, nur hanani ahmad, siti roszilawati, petrick periyasamy.  (2024).  a bat scientist gambit – a first reported lyme disease in malaysia.  - international congress of tropical medicine and malaria .  . 

petrick periyasamy , ganesh ramachandran.  (2024).  clearing the air .  - staredu.  . 

nurul syafiqah abdul kadir, siti norlia othma, norzuriza mohd rais, hui-min neoh, meng ling moi, najma kori, petrick periyasamy and nor azila muhammad azami.  (2024).  genomic surveillance of dengue virus in patients admitted to a teaching hospital in kuala lumpur, malaysia from 2022 to 2023.  - 7th asia dengue summit.  81. 

nurul dayana zainudin, siti norlia othman, norzuriza mohd rais, hui-min neoh, meng ling moi, najma kori, petrick periyasamy & nor azila muhammad azami.  (2024).  seroprevalence of neutralizing antibodies against denv-1 and denv-4 among patients admitted to a teaching hospital in kuala lumpur.  - 7th asia dengue summit 2024.  82. 

cheelan lau, petrick periyasamy, kiew bing pau, shue hong kong, farah waheeda tajurudin, sheah lin ghan, nur jannah azman, stephanie wai yee tan, muhammad nazrin ibrahim, xiong khee cheong, ummu afeera zainulabid, fara rahidah hussin, toh leong tan, hui-m.  (2024).  improved timelines in antibiotic optimization: impact of pharmacists in bacteraemia stewardship.  - 2nd pharmcare symposium.  28. 

ummu afeera zainulabid, cheong xiong khee , fara rahidah hussin , petrick periyasamy .  (2024).  urine brilliance urine tb lam's role in challenging aids cases from lmic's perspective.  - european congress of clinical microbiology and infectious disease .  . 

afeera zainulabid u, khee c, nawawi m, othman s , faisal u, ali a, periyasamy p .  (2024).  from bench to bedside elucidating the diagnsosi of acute hiv in complex dada2 case with serial 4th generation hiv serology , hiv rna viral viral load and line immunoassay .  - asia pacific aids and co infections conference apacc.  . 

ummu afeera zainulabid , nur shafiqah mohd fauzi , cheong xiong khee , asiyah nordin, petrick periyasamy .  (2024).  striking a chord fusobacterium nucleatums symphony in the intricacies of biliary sepsis.  - european congress of clinical microbiology and infectious disease .  . 

petrick periyasamy dr zulkifli ismail dr abdullahi sheriff .  (2024).  msd’s vaxneuvance 15-valent pneumococcal vaccine now available in malaysia.  - code blue .  . 

petrick periyasamy zulkifili ismail abdulahi sheriff.  (2024).  msd introduces vaxneuvance the pneumococcal conjugate vaccine approved to help protect pediatrics and adult population against invasive pneumococcal disease.  - the asian parent .  . 

petrick periyasamy zulkifili ismail abdulahi sheriff.  (2024).  vaccine to prevent pneumococcal disease.  - the sun malasyia.  . 

emelia osman, nur azma amin, thieeraporn phraseart ma noon, siti nuratiqah hanani lahat,mohamad syairazi rosli, shazia farhana sham, petrick ramesh periyasamy, nuraffini ghazali, noor wanie hassan, siti nor azreen abd manap, rahmah noordin.  (2023).  comparison between igg-elisa and igg4-based lateral flow (ssrapid) assays for the diagnosis of strongyloides infection in immunocompromised patients.  - 59th annual scientific conference of the malaysian society of parasitology & tropical medicine.  61. 

putri sabrina mohamed yusoff, norsyahida arifin, petrick periyasamy, nor rafeah tumian, fuad ismail, raja zahratul azma raja sabudin, rahmah noordin, emelia osman.  (2023).  antigenic reactivity of recombinant enterocytozoon bieneusi proteins against serum antibodies in disseminated microsporidiosis patients.  - 59th annual scientific conference of the malaysian society of parasitology & tropical medicine.  64. 

tan hui jan;petrick @ ramesh a/l k periyasamy;siti zaleha binti sahibulddin;rozita binti hod;wan asyraf bin wan zaidi;law zhe kang;nursyazwana binti zolkafli;khoo ching soong;ng chen fei.  (2023).  prevalence and factors associated with neurological abnormalities among covid-19 patients.  - .  . 

petrick @ ramesh a/l k periyasamy;lau chee lan;ramliza binti ramli;rozita binti hod;najma binti kori.  (2023).  early switching intravenous antibiotic to oral antibiotic in uncomplicated enterobacteriaceae bacteremia.  - .  . 

ummu afeera zainulabid , nabil anaz anzani danapaul, chee lan lau , najma kori , yusuf zawir abd rahim, ramliza ramli , petrick periyasamy.  (2023).  revitalizing the blood culture volume.  - 33rd eccmid.  P3478. 

nurul aisyah rapai kasini , ummu afeera zainulabid rashida safiuddin, wan husna barakah meor jamaludin, najma kori, petrick periyasamy.  (2023).  a case of dengue and covid-19 co-infection in a young man from malaysia.  - 33 eccmid.  P3165. 

ummu afeera zainulabid , muhammad khidhir kamil, fatin farahani ramzah, lee chen dar, , mohamad azim md idris , lenny suryani safri, najma kori, petrick periyasamy.  (2023).  a vascular graft infection nightmare secondary to candida albicans.  - 33rd eccmid.  P3377. 

petrick @ ramesh a/l k periyasamy;lau chee lan;rozita binti hod;najma binti kori.  (2023).  audit & feedback on carbapenem: impact of multidisciplinary antimicrobial stewardship team among medical patient in universiti kebangsaan malaysia medical centre .  - .  . 

ummu afeera zainulabid, najma kori, syed nabil2, benjie law, jia yee tan, jian kiat yuen, reena rahayu md zin, petrick periyasamy.  (2023).  a twist in the tale -actinomycotic maxillaryosteomyelitis in glottic cancer.  - the 19th asia pacific congress of clincal microbiology and infection.  182. 

ummu afeera zainulabid, muhammad afiq ab karim, najma kori, fara rahidah hussin, hazlina mahadzir, petrick periyasamy.  (2023).  chikungunya strikes the golden years -the unexpected visitor.  - the 19th asia pacific congress of clincal microbiology and infection.  273. 

ummu afeera zainulabid, khairul azhar jaafar, azlida che aun, petrick periyasamy..  (2023).  unmasking a hidden culprit: a case of 'diphtheritic' colitis.  - the 19th asia pacific congress of clincal microbiology and infection.  232. 

nurul izzati abdul aziz, ummu afeera zainulabid, farhan ibrahim, wong yin ping, fara rahidah hussin, najma kori, petrick periyasamy.  (2023).  surviving a deadly duo: a shocking case of double trouble in leptospirosis in leptospirosis.  - the 19th asia pacific congress of clincal microbiology and infection.  196. 

ummu afeera zainulabid, fara rahidah hussin, najma kori, sreeambal ramankutty, muhammad nazri aziz, petrick periyasamy, muhamad yazli yuhana.  (2023).  when mycobacterium abscessus strikes: when bacteremia meets vertebral osteomyelitis.  - the 19th asia pacific congress of clincal microbiology and infection.  280. 

tan kah shien, ummu afeera zainulabid1, fara rahidah hussin, cheong xiong khee, najma kori, petrick periyasamy..  (2023).  from negative to unmasked: cryptococcal meningitis iris strikes unexpectedly.  - clinical case competition.  9. 

kwan li li, ummu afeera zainulabid, fara rahida hussin, cheong xiong khee, petrick periyasamy..  (2023).  shattered hips, unbreakable spirit: navigating hiv therapy's roadblocks.  - clinical case competition.  10. 

rafiq shajahan, ahmad zuhri shin abd halim , rozilah ishak , suria hayati md pauzi , nurismah md isa , wei hao kok , najma kori , ummu afeera zainulabid, petrick periyasam.  (2023).  hickam's dictum prevails: navigating the maze of dual pathology in hiv.  - clinical case competition.  11. 

nurul syafiqah nabilah abdul kadir, siti norlia othman, norzuriza mohd rais, hui-min neoh, meng ling moi, najma kori, petrick periyasamy, nor azila muhammad azami.  (2023).  optimization of annealing temperature for dengue virus serotyping using multiplex polymerase chain reaction (pcr) technique.  - 9th regional conference on molecular medicine (rcmm) in conjunction with 5th national conference for cancer research (nccr).  1. 

x.k.cheong, p.periyasamy, n.kori,c.l.lau,t.l.tan,n.a.m.mustafa,r.ramli.  (2023).  novel emergency department specific antibiogram in malaysia.  - 3rd antimicrobial resistance symposium 2023.  60. 

nor azura a, nur ayub ma, suriati sani, chu ming c, petrick p, wan asyraf wz, mohd rizal am, katijjahbe ma.  (2023).  the effect of enhanced respiratory care with early mobilization (e-recover) on cognitive and depression amongst patients with covid-19.  - 25th medical & health research week.  1. 

ilham ismail, najma kori, chee lan lau, azmi mohd tamil, ramliza ramli, xiong khee cheong, petrick periyasamy.  (2023).  mortality rate and its risk factors for multidrug resistance acinetobacter baumannii bacteraemiain universiti kebangsaan malaysia medical centre (ukmmc).  - 3rd antimicrobial resistance symposium 2023.  39. 

ummu afeera zainulabid, petrick periyasamy, cheong xiong khee, fara rahidah hussin, sunita sulaiman, siti rokiah yusof, nur ayuni ahmad faudzi, maliha farah nurhazirah yahya, adzim poh yuen wen, mohd hafiiz mohamad rizan, fazarina mohammed, sharifah azura.  (2023).  confluence of flames and fungus: navigating a complex superimposed fungal infection in the burn unit.  - apfcb laboratory medicine case contest.  01. 

fara rahidah hussin , nor shuhaila shahril , ummu afeera zainulabid , najma kori , petrick periyasamy.  (2023).  pulmonary-urogenital tuberculosis: a delayed diagnosis.  - american society of tropical medicine and hygeine.  198-199. 

lai fong chan, eu choon leng, hajar mohamad salleh sahimi, nuur asyikin mohd syukor, nurul ain mohamad kamal, luke woon sy-cherng, liu chian yong, petrick @ ramesh k. periyasamy, najma kori, tan toh leong, clarence ko ching huat, nor hasnani zahari & azli.  (2022).  maintaining inpatient psychiatric services: malaysia.  - .  1. 

petrick periyasamy.  (2022).  experts: young adults with underlying conditions risk pneumonia.  - code blue.  1-3. 

m sugenthiran, petrick periyasamy, ramliza ramli, najma kori ,lau chee lan, rosnah binti ismail.  (2022).  association between serotype of dengue virus and viremia level with clinical presentation among dengue patients adimitted to hospital canselor tuanku mukhriz (hctm): a pilot study.  - 5th international conference on tropical medicine and infectious diseases (ictmid).  1. 

muhammad hazwan nasarudin, najma kori,ramliza ramli, rozita hod,chee lan lau,petrick periyasamy.  (2022).  extended-spectrum beta-lactamase (esbl) bacteremia: looking into the risk factors of mortality from malaysian perspective.  - 5th international conference on tropical medicine and infectious diseases.  521. 

m sugenthiran , p periyasamy , n kori , cl lau.  (2022).  clinical significance of coagulase-negative staphylococci bacteremia its financial impact and treatment outcomes in ukmmc.  - 5th international conference on tropical medicine and infectious diseases (ictmid).  1. 

putri sabrina mohamed yusoff, norsyahida arifin, petrick periyasamy,nor rafeah tumian,fuad ismail,raja zahratul azma raja sabudin,rahmah noordin, emelia osman.  (2022).  production of enterocytozoon bieneusi recombinant protein and reactivity of its polyclonal antibodies toward encephalitozoon cuniculi.  - the 6th international conference on molecular diagnostic and biomarker discovery.  151. 

ummu salamah faisal, ummu afeera zainulabid, najma kori, petrick periyasamy, tzar mohd khaithir.  (2022).  vibrio cholera o1 ogawa bacteremia with extrainstestinal manifestation.  - international congress on infectious diseases.  174. 

petrick periyasamy prapatricca shanmugam najma kori ummu afeera zainulabid.  (2022).  acute pyelonephritis with candidemia caused by fluconazole resistant candida albicans.  - international congress on infectious diseases.  P52. 

petrick periyasamy tan li fen najma kori ummu afeera zainulabid.  (2022).  rebound covid-19 after paxlovid in 2 related family members.  - international congress on infectious diseases.  P08. 

neoh hui min;sheila nathan;a. rahman bin a. jamal;alfizah binti hanafiah;wong kon ken;petrick @ ramesh a/l k periyasamy;ramliza binti ramli;muttaqillah najihan bin abdul samat;tan toh leong;ang mia yang;sylvia chieng.  (2021).  transforming pathogen identification in an era of the 4th industrial revolution: development of a decision-making algorithm for rapid pathogen identification in the clinical microbiology laboratory .  - .  . 

wan fariza binti wan jamaludin;s fadilah binti s. abdul wahid;hanita binti othman;shamsul azhar bin shah;petrick @ ramesh a/l k periyasamy;tan toh leong;noralisa binti abdul karim.  (2021).  hemostatic parameters and biochemical markers to predict severe dengue infection in patients with “warning signs” .  - .  . 

wan nabilatul huda wan ghazali, zetti zainol rashid, anita sulong, nur izati mustapa, petrick periyasamy, suresh kumar chidambaram.  (2021).  cytomegalovirus (cmv) infections in hiv/aids patients: study on infection prevalence, associated factors and drug-resistance testing.  - the 18th asia pacific congress of clinical microbiology and infection (apccmi), singapore 2021.  1. 

putri sabrina mohamed yusoff, norsyahida arifin, petrick periyasamy, nor rafeah tumian, fuad ismail, raja zahratul azma raja sabudin, rahmah noordin, noor wanie hassan, emelia osman.  (2021).  the diagnostic value of blood-based pcr for identification of extraintestinal microsporidiosis in immunocompromised patients.  - monash initiate: inaugural monash international health science and technology conference.  136. 

yusuf abu shamsi, wan rohaslizan wan daud, lydia kamaruzaman, ruslinda mustafar, rozita mohd, petrick periyasamy, abdul halim abdul gafor.  (2021).  the characteristics and outcome of covid-19 patients with acute kidney injury: a single center experience.  - 36th annual congress of malaysian society of nephrology.  138. 

wan rohaslizan wan daud, ruslinda mustafar, muhammad yusuf abu shamsi, lydia kamaruzaman, petrick periyasamy, junaida che ani.  (2021).  confronting the pandemic, reconfiguration nephrology services: narrative report form a teaching hospital- universiti kebangsaan malaysia.  - 36th annual congress of malaysian society of nephrology.  144. 

putri sabrina mohamed yusoff, norsyahida arifin, petrick periyasamy, nor rafeah tumian, fuad ismail, raja zahratul azma raja sabudin, rahmah noordin, noor wanie hassan, emelia osman.  (2021).  the diagnostic value of blood-based pcr for diagnosis of disseminated microsporidiosis in immunocompromised patients.  - 57th annual scientific conference of the malaysia society of parasitology and tropical medicine.  93. 

ilyana mohd zuhudi, wan rahiza wan mat, lau chee lan, ramliza ramli, petrick periyasamy, raha abdul rahman.  (2021).  evaluation of antimicrobial stewardship program in the general intensive care unit of a teaching hospital.  - annual scientific congress 2021.  56. 

thieeraporn phraseart ma noon, mohamad syairazi rosli, shazia farhana sham, siti nuratiqah hanani lahat, petrick@ramesh periyasamy, rahmah noordin, nuraffini ghazali, siti noor azreen abdul manap, nur azma amin, emelia osman.  (2021).  comparison of two serological assays in detecting strongyloides stercoralis infection in immunocompromised patients.  - 13th muasrm medical undergraduates annual scientific research meeting.  26. 

aliff saifuddin mohd shukri, nor rafeah tumian, nurasyikin yusof, azlin ithnin, petrick periyasamy, najma kori, noorzilawati sahak.  (2021).  comparison of coagulation parameters between covid-19 patients with and without pneumonia in a single tertiary hospital in kuala lumpur, malaysia.  - 18th malaysian society of haematology annual scientific meeting.  1-7. 

petrick periyasamy.  (2021).  mims doctor.  - burden of pneumococcal disease among risk groups, pneumococcal vaccination strategies and recommendations among adults: local and global perspectives.  1-3. 

mohd rohaizat bin hassan, azmawati mohammed nawi, rozita hod, azimatun noor aizuddin, norfazilah ahmad, asrul bin abdul wahab, tzar mohd nizam bin khaithir, faiz daud, sharifah azura salleh, petrick @ ramesh, najma kori.  (2020).  bantuan penuh hctm: setinggi penghargaan rakyat malaysia.  - buletin bilik gerakan covid-19 hctm.  1-4. 

petrick @ ramesh a/l periyasamy.  (2020).  41 pelajar tahfiz sembuh : pengesanan, kuarantin, isolasi dan rawatan awal langkah tepat bantu proses penyembuhan.  - buletin bilik gerakan covid-19 hctm.  1-4. 

dr petrick @ ramesh periyasamy.  (2020).  bicara persada 59: covid 19, selamatkah kita?.  - .  1. 

petrick @ ramesh a/l k periyasamy.  (2020).  demam campak boleh bawa maut.  - mingguan malaysia.  34. 

petrick @ ramesh a/l k periyasamy.  (2020).  roche launches xofluza, a single-dose treatment for influenza in malaysia.  - malaysian business online.  -. 

petrick @ ramesh a/l k periyasamy.  (2020).  the star.  - any mask is still better than none.  -. 

sn othman, zz rashid, uk ali, kk wong, mn abdul samat, p periasamy, n kori, n rais, h yusof, s mohd puzi, a noordin, ah abdul hamid, a sulong, an zailani, mha mohd nasir.  (2020).  performance of reszon covid-19 rapid igg/igm test.  - .  1-4. 

mn abdul samat, uk ali, sn othman, zz rashid, kk wong, p periasamy, n kori, n rais, h yusof, s mohd puzi, a noordin, ah abdul hamid, a sulong, ma ismail, na abu bakar.  (2020).  performance of panbio covid-19 igg/igm rapid test device.  - .  1-4. 

sn othman, zz rashid, uk ali, kk wong, mn abdul samat, p periasamy, n kori, n rais, h yusof, s mohd puzi, a noordin, ah abdul hamid, a sulong.  (2020).  lepu technology sars-cov-2 antibody test device.  - .  1-3. 

uk ali, mn abdul samat, sn othman, zz rashid, kk wong, p periasamy, n kori, n rais, h yusof, s mohd puzi, a noordin, ah abdul hamid, a sulong, d zainuddin, nh ramli.  (2020).  performance of livzon covid-19 igg/igm rapid test device.  - .  1-4. 

lydia kamaruzaman, fong voon ken, najma kori,petrick periyasamy,rozita mohd, ruslinda mustafar.  (2020).  infective endocarditis in renal transplant patient treated with partial oral antibiotic.  - 23rd annual scientific meeting of the malaysian society of transplantation.  91. 

petrick periyasamy.  (2020).  all year round: malaysian expert cautions about the dangers of flu and what can be done.  - malaymail.  1. 

rayhan aghani e.amiseno, petrick periyasami, najma kori, ramliza ramli, isa naina mohamed, lau chee lan.  (2020).  the appropriateness in requesting for urine culture in ukmmc medical ward: a pre and post- educational intervention study.  - .  1-21. 

umi kalsom @ satariah ali, anita sulong, zetti zainol rashid, muttaqillah najihan abdul samat, wong kon ken, siti norlia othman, abdul hamydy abdul hamid, danori sardi, ainihayati noordin, petrick @ ramesh a/l k periasamy, najma kori, azmi baharudin.  (2020).  kriteria penerimaan / penolakan spesimen bagi ujian pengesanan rapid antigen covid-19 dan carta alir pemilihan pengujian covid-19.  - pengujian rapid ag covid-19, jabatan perkhidmatan makmal diagnostik, hospital canselor tuanku muhriz.  1-3. 

anita sulong, umi kalsom, zetti zainol rashid, muttaqillah najihan abdul samat, wong kon ken, siti norlia othman, abdul hamydy abdul hamid, danori sardi, ainihayati noordin, petrick @ ramesh a/l k periasamy, najma kori, hanita othman.  (2020).  carta alir ujian makmal polymerase chain reaction (pcr) covid-19.  - .  1-3. 

sn othman, zz rashid, uk ali, kk wong, mn abdul samat, p periasamy, n kori, n rais, h yusof, s mohd puzi, a noordin, ah abdul hamid, a sulong.  (2020).  performance of accobiotech covid-19 igg/igm rapid test device.  - .  1-3. 

hakim rahman, nailah huda, dr petrick periyasamy.  (2019).  hari aids sedunia.  - awani pagi.  . 

petrick periyasamy.  (2019).  hari aids sedunia.  - astro awani pagi.  . 

emelia osman, nurul shazalina zainudin, rahmah noordin, nurul hasanah othman,asmahani azira abdu sani, wan mohd aizat wan kamaruddin, petrick ramesh periyasamy.  (2019).  identification of e. bieneusi circulating proteins from hiv/aids patients with disseminated microsporidiosis via shotgun proteomic approach.  - 55th annual scientific conference of the malaysian society of parasitology and tropical medicine (msptm).  84. 

petrick periyasamy.  (2019).  demam selepas masuk hutan mungkin jangkitan malaria.  - bh online.  1-3. 

ding chuan hun;hamidah binti yusoff;petrick @ ramesh a/l k periyasamy;andrea ban yu-lin;muttaqillah najihan bin abdul samat;tang yee loong.  (2019).  prevalence of pneumocystis jirovecii pneumonia (pcp) in aids patients in ukm medical centre.  - .  1-5. 

cs ng, abdul wahid fs, tumian nr, wan jamaludin wf, yap e, petrick p, nurwahyuna r, noraidah m.  (2017).  back pain: road to burkitt`s "discovery".  - malaysian society of haematology 14th annual scientific meeting.  . 

petrick periyasamy.  (2017).  dengue : vaccine preventable diseases.  - third international conference on tropical medicine and infectious diseases.  . 

tser wan pang, adyani md-redzuan, mohd makmor-bakry, chee lan lau, zamri zuhdi, abdul halim abd rashid, nordiah awg jalil, ramliza ramli, raha abdul rahman, wan rahiza wan mat, razman jarmin, petrick@ ramesh k periyasamy,.  (2017).  compliance of antimicrobial prophylaxis practice for surgery in malaysian teaching hospital.  - australasian society for infectious diseases annual scientific meeting 2017.  . 

ng choon seong, lau chee lan, chua xin yun, farah waheeda, sarah anee roberts ,nur jannah azman, lysia loong,pau kiew bing, kong shue hong,petrick periyasamy.  (2017).  carbapenem usage in medical wards an antibiotic stewardship feedback project.  - annual scientific meeting on emerging infectious threat.  . 

petrick periyasamy.  (2017).  malaysian consensus guidelines on antiretroviral therapy 2017.  - .  1-92. 

nurul shahirah solleh, azmi mohd tamil, petrick periyasamy.  (2017).  kajian tentang kualiti hidup, sokongan sosial dan kemahiran daya tindak bagi pesakit hiv di hospital canselor tuanku muhriz.  - 21st national public health colloquium.  . 

nurul shazalina z, petrick p, norhayati m, rahmah n, emelia o.  (2016).  disseminated microsporidiosis: detection of enterocytozoon bieneunsi circulating antigen from hiv patients via serum proteomic approach.  - 52nd annual scientific conference malaysian society of parasitology and tropical medicine.  . 

pk chia, p periyasamy, zk law, s sharis, sa mohamed mukari, sa shah, r remli, n yahya, hj tan, n mohd ibrahim, r azman ali.  (2016).  survival analysis and clinical predictors of tuberculous meningitis in university kebangsaan malaysia medical center (ukmmc).  - 15th asian and oceanian congress of neurology.  . 

p.k. chia, p. periyasamy, z.k. law, s. sharis, s.a. mohamed mukari, s.a. shah, r. remli, n. yahya, h.j. tan, n. mohd ibrahim, r. azman ali.  (2016).  features of tuberculous meningitis in a tertiary hospital in malaysia.  - international congress for tropical medicine and malaria.  . 

ng cs, petrick p, abdul wahid fs, tumian nr, wan jamaluddin wf, yap e, nurwahyuna r, noraidah m.  (2016).  retroviral disease manifested early as spinal burkitt`s.  - national hiv treatment update 2016.  . 

nanthini mageswaran, petrick periyasamy.  (2015).  knowledge and level of awareness of methicillin-resistant staphylococcus aureus (mrsa) among medical students.  - international future scientists conference 2015 ``meeting 21century demands: integrating arts & stem``.  . 

wan fariza wan jamaludin , petrick periyasamy , wan rahiza wan mat, s fadilah abdul wahid.  (2015).  dengue infection associated hemophagocytic syndrome: therapeutic interventions and outcome.  - xiith malaysia national haematology scientific meeting poster presentation list.  . 

petrick periyasamy.  (2015).  managing complicated mrsa ssti infections.  - infectious diseases & microbial genomics 2015.  . 

datuk dr. christopher lee kwok chong, dato dr. faraizah, dato abdul karim, dr.petrick periyasamy, ravichandran jeganathan senior consultant, datin dr. rugayah bakri, dr. sabariah faizah jamaluddin, datin dr. sivasakthi velayuthapillai, dr. hari dass,.  (2015).  clinical practise guidlines: management of dengue infection in adults.  - clinical practise guidlines: management of dengue infection in adults.  1-43. 

nurul shazalina z, petrick, p, norhayati m, rahmah n, emelia o.  (2015).  detection of microsporidia parasite in blood from hiv patients by pcr.  - 51st annual scientific conference of the malaysian soceity of parasitology and tropical medicine.  . 

nur hasyimah othaman, petrick periyasamy.  (2014).  kurangkan antibiotik.  - isihat.  . 

nur hasyimah othaman, petrick periyasamy.  (2014).  kerjaya perubatan.  - isihat.  . 

petrick p, ding ch, tzar mn.  (2014).  prevalence of serum cryptococcal antigen (sca) positive rates at different cd4 ranges in art naive hiv patients at a tertiary center in kl.  - 3rd national aids conference (nac).  . 

ministry of health malaysia.  (2014).  consensus guidleines on antiretroviral therapy 2014.  - .  . 

z nurul shazalina, n siti nur su`aidah, p petrick, m norhayati, n rahmah, o emelia.  (2014).  first report on molecular detection of enterocytozoon bieneusi in blood from hiv/aids patients.  - jitmm2014 & fbpz8.  . 

cl lau, nj azman, sl ghan, fw tajuruddin, sh kong, kb pau, ls loong, sa robert, yk lai, mk yin, p periyasamy.  (2014).  impact of carbapenems stewardship in medical wards in a malaysian teaching hospital.  - 15th asia pacific congress of clinical microbiology and infection.  . 

petrick periyasamy.  (2013).  state of the art mrsa nosocomial pneumonia management : how can we improve treatment outcomes.  - malaysian thoracic society annual congress 2013.  . 

mohamed faisal ah, petrick p, roslina am, andrea yl ban, ramliza r, anita s, zalina i, tzar nk, zaleha mi.  (2013).  detection rate of pneumococcal pneumonia using urine antigen kit (binaxnow) in adult community-acquired and health care associated pneumonia in ukmmc.  - malaysian thoracic society annual congress 2013.  . 

petrick periyasamy.  (2013).  state-of-the-art mrsa nosocomial pneumonia management: how can we improve treatment outcomes.  - malaysian thoracic society annual congress 2013.  . 

petrick periyasamy, leong chee loon, christopher lee.  (2013).  hyperlactatemia outcome in a cohort of patients with hiv on haart.  - 8th malaysia indonesia brunei medical sciences conference.  . 

petrick periyasamy.  (2013).  aids situation in malaysia.  - 8th malaysia indonesia brunei medical sciences conference.  . 

lau chee lan, nur jannah azman, gan sheah lin, kong shue hong, pau kiew bing, loong ly sia, sarah anne robert, farah waheeda tajurudin, lai yin key, yin mei kuen, petrick periyasamy.  (2013).  antimicrobial stewardship program in medical wards ukmmc.  - 8th malaysia indonesia brunei medical sciences conference.  . 

mohamed faisal abdul hamid, petrick periyasamy, roslina abdul manap, andrea ban yu-lin, ramliza ramli, anita sulong, zalina ismail, tzar mohd nizam.  (2013).  aetiology and outcome of gram negative bacteria in adult community-acquired pneumonia and health-care associated pneumonia in university kebangsaan malaysia medical centre.  - 8th malaysia indonesia brunei medical sciences conference.  . 

tzar mohd nizam khaithir, petrick periyasamy, hamidah yusoff.  (2013).  antifungal susceptibility profiles of candida blood isolates in ukmmc malaysia.  - 8th malaysia indonesia brunei medical sciences conference.  . 

mohamed faisal ah, petrick p, roslina am, andrea yl lan, ramliza r, anita s, zalina i, tzar nk, zaleha mi.  (2013).  detection rate of streptococcus pneumoniae using urinary antigen (binaxnow test) in community-acquired and health-care associated pneumonia in ukmmc.  - 9th international symposium on antimicrobial agents and resistance (isaar 2013).  . 

q.nguyen, d. marriot and the malaysian candidaemia study (macas) group.  (2012).  candidaemia in malaysia : surprising results from a national study.  - 52nd icaac 2012.  . 

p. periyasamy, d. marriott.  (2012).  a retrospective review of staphylococcal infections in st vincent`s hospital 2006-2007.  - 15th international congress on infection diseases.  . 

pau cp, anis farahanum za, muhammad zulhilmie s, ng ky, siti qani`ah a, petrick p, ramliza r, anita s, abdul halim ag.  (2012).  antibiogram for haemodialysis catheter related sepsis.  - 4th medical undergraduates` annual scientific research meeting.  . 

yusairi fitri yusuf, petrick @ ramesh k periyasamy.  (2011).  misteri serangan adenovirus.  - isihat.  . 

dr petrick periasamy.  (2010).  current challenges in h1n1.  - 6th malaysia indonesia & brunei medical science conference.  . 

dr petrick k periyasamy.  (2009).  dengue fever vs chikungunya - the unresolved epidemic.  - the 1st annual health conference.  .