title: An age-adjusted seroprevalence study of Toxoplasma antibody in a Malaysian ophthalmology unit.
abstract: Toxoplasma gondii is a public health risk in developing countries, especially those located in the tropics. Widespread infection may inflict a substantial burden on state resources, as patients can develop severe neurological defects and ocular diseases that result in lifelong loss of economic independence. We tested sera for IgG antibody from 493 eye patients in Malaysia. Overall age-adjusted seroprevalence was estimated to be 25% (95% CI: [21%, 29%]). We found approximately equal age-adjusted seroprevalence in Chinese (31%; 95% CI: [25%, 38%]) and Malays (29%; 95% CI: [21%, 36%]), followed by Indians (19%; 95% CI: [13%, 25%]). A logistic regression of the odds for T. gondii seroprevalence against age, gender, ethnicity and the occurrence of six types of ocular diseases showed that only age and ethnicity were significant predictors. The odds for T. gondii seroprevalence were 2.7 (95% CI for OR: [1.9, 4.0]) times higher for a patient twice as old as the other, with ethnicity held constant. In Malays, we estimated the odds for T. gondii seroprevalence to be 2.9 (95% CI for OR: [1.8, 4.5]) times higher compared to non-Malays, with age held constant. Previous studies of T. gondii seroprevalence in Malaysia did not explicitly adjust for age, rendering comparisons difficult. Our study highlights the need to adopt a more rigorous epidemiological approach in monitoring T. gondii seroprevalence in Malaysia.
authors.affiliation: Department of Ophthalmology, University Malaya Medical Centre, Lembah Pantai, 59100, Kuala Lumpur, Malaysia.
authors.forename: Sujaya
authors.initials: S
authors.lastname: Singh
authors.forename: Tsung Fei
authors.initials: TF
authors.lastname: Khang
authors.forename: Hemah
authors.initials: H
authors.lastname: Andiappan
authors.forename: Veeranoot
authors.initials: V
authors.lastname: Nissapatorn
authors.forename: Visvaraja
authors.initials: V
authors.lastname: Subrayan
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood*; D044466:Asian People / Q000706:statistics & numerical data; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D016867:Immunocompromised Host; D007074:Immunoglobulin G / Q000097:blood; D016015:Logistic Models; D008296:Malaysia / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D009885:Ophthalmology; D012307:Risk Factors; D016036:Seroepidemiologic Studies; D014122:Toxoplasma / Q000276:immunology / Q000302:isolation & purification*; D014123:Toxoplasmosis / Q000175:diagnosis* / Q000208:ethnology / Q000276:immunology; D015866:Uveitis, Posterior / Q000175:diagnosis* / Q000208:ethnology / Q000276:immunology; D055815:Young Adult
chemical_list: D000913:Antibodies, Protozoan; D007074:Immunoglobulin G