Progression of Salmonella Enteritidis phage type 4 strains in São Paulo State, Brazil Disseminação de cepas de Salmonella Enteritidis do fagotipo 4 (PT-4) em São Paulo, Brasil
A total of 574 S. Enteritidis strains (383 from human sources and 191 from non-human sources) isolated between 1975-95, in São Paulo State, Brazil, were phagetyped. Among the strains isolated during the period of 1975-92, 80.9% of them belonged to phage type 8 (PT-8), but in 1993 strains of PT-4 acc...
Published in: | Revista do Instituto de Medicina Tropical de São Paulo |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Universidade de São Paulo (USP)
1996
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Subjects: | |
Online Access: | https://doi.org/10.1590/S0036-46651996000300005 https://doaj.org/article/4c0ea64ac9d1419789bb368dec866b13 |
Summary: | A total of 574 S. Enteritidis strains (383 from human sources and 191 from non-human sources) isolated between 1975-95, in São Paulo State, Brazil, were phagetyped. Among the strains isolated during the period of 1975-92, 80.9% of them belonged to phage type 8 (PT-8), but in 1993 strains of PT-4 accounted for 65.2% of all the S. Enteritidis isolates. In the following years, PT-4 strains accounted for 99.7% and 98.4% of phagetyped S. Enteritidis strains. The results obtained suggested that the current epidemic of S. Enteritidis in São Paulo State is clearly associated with the progression of PT-4 strains. Um total de 574 cepas de Salmonella Enteritidis isoladas no período 1975-95, em São Paulo, Brasil, foram fagotipadas. Entre estas cepas, 383 eram de origem humana e 191 isoladas de materiais de origem não humana. Verificou-se que a grande maioria (80.9%) das cepas isoladas até 1992 pertencia ao fagotipo 8 (PT-8) e que cepas do fagotipo 4 (PT-4) começaram a predominar a partir de 1993. Cepas deste fagotipo corresponderam em 1993, 1994 e 1995, respectivamente, a 65.2%, 99.7% e 98.4% das amostras fagotipadas. O aumento da S. Enteritidis em São Paulo está claramente associado a disseminação de cepas PT-4. |
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