[Epidemiology of toxoplasmosis in Chile. VI. Prevalence of human infection, investigated by means of an indirect hemagglutination test, in regions VII, VIII and IX].
In presecuting the investigations on the epidemiology of toxoplasmosis in Chile, a new series of serological surveys has been performed during 1982-1989 in 10 urban and 25 periurban-rural localities from the regions VII, VIII and IX of the country (34 degrees 41'-39 degrees 38' South lat.). In 9,758, randomly selected apparently healthy persons, and indirect hemagglutination test (IHAT) for toxoplasmosis was carried out. The age of these individuals (4,203 males and 5,555 females) varied between 4 and 84 years. The examined persons represent a 0.33% of the total population of the three studied regions. IHAT titers of 1: > or = 16 were regarded as positive. The global prevalence for positive IHAT was 45.5% (50.5% in men and 41.7% in women). A higher proportion of positive tests was observed in urban areas (47.0%) than in periurban-rural sections (33.3%). An increasing prevalence with age was also observed. Only 5 (0.05%) persons had IHAT titers higher than 1:1000.
Schenone
H
H
Departamento de Microbiología y Parasitología, Facultad de Medicina, Universidad de Chile, Santiago.
Salinas
P
P
Contreras
M C
MC
Sandoval
L
L
Rojas
A
A
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D002677:Chile / Q000453:epidemiology; D005260:Female; D006306:Health Surveys; D006386:Hemagglutination Tests; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D012424:Rural Population; D012737:Sex Factors; D014123:Toxoplasmosis / Q000175:diagnosis / Q000453:epidemiology*; D014505:Urban Population
Epidemiología de la toxoplasmosis en Chile. VI. Prevalencia de la infección humana, investigada por medio de la reacción de hemaglutinación indirecta, en las regiones VII, VIII y IX.