Deteccion de portadores de Salmonella Typhi mediante la prueba de hemaglutinacion indirecta con antigeno Vi muy purificado / Screening of Salmonella Typhi carriers by indirect hemagglutination using highly purified Vi antigen
Bol. Oficina Sanit. Panam
;
105(3): 283-289, sept. 1988.
Artigo
em Espanhol
| LILACS
| ID: lil-367056
RESUMO
A study was carrried out to determine the predictive value and the cost-effectiveness of the indirect hemagglutination test using highly purified Vi antigen as a means of screening Salmonella Typhi carrriers in a high-risk group living in an área where typhoid fever is emdemic. The group consisted of women over age 30 who were participating in a municipal sanitary control program for food handlers in Lima, Perú. Test yielding an anti-Vi antibody titer= 140 were considered positive (79 percent sensitivity, and 99 percent and 100 percent specificity for the local population). On this basis, 29 women (1.5 percent) tested positive out of a total of 1 931. A follow-up bacteriological study demonstrated that 26 of these 29 women were carriers of S. typhi; thus, the test had a predictive value of 15 percent. The prevalence of carriers in this group was estimated at 292 per 100 000 population. The test cost $US 0.30 per person. In comparison, the method that requires a series of three fecal cultures to isolate the causative agent would have cost $US 1.72. It can be concluded that the test studied is suficiently sensitive, that it is highly specific, and that it is cost-effective when used to detect S. typhi carriers in áreas where typhoid fever is endemic
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Índice:
LILACS (Américas)
Assunto principal:
Salmonella typhi
/
Testes de Hemaglutinação
/
Antígenos de Bactérias
Tipo de estudo:
Estudo diagnóstico
/
Estudo prognóstico
/
Fatores de risco
/
Estudo de rastreamento
País/Região como assunto:
América do Sul
/
Peru
Idioma:
Espanhol
Revista:
Bol. Oficina Sanit. Panam
Assunto da revista:
Saúde Pública
Ano de publicação:
1988
Tipo de documento:
Artigo
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