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Int J Zoonoses. 1977 Jun;4(1):21-4.

Serological study of listeriosis in domestic animals in São Paulo-Brazil.


A serological examination was carried out for L. monocytogenes antibodies on 9,318 domestic animal--7,809 bovine, 838 horses and 671 swine--in São Paulo, Brazil. Serum agglutination in tubes was the method used. Only somatic antigens from serotypes 1, 2, 3, 4a and 4b were employed. It was considered reagent all sera reacting in a titer 1/20 while as positive only sera with 1/320 or above. According this criteria the results showed showed that in cattle 17.8% were reagent but only 8 sera were positive for types 1, 2 and 4b. Only type 1 was found in horses in a rate of 22.7% reagent, and 11 positive samples. For swine the percentage of reagent was 13.3% but none serum was positive, since the highest titer was 1/160.

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