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Results of leptospirosis examinations of human sera from El Salvador.

The authors examined 984 human sera for leptospirosis with the serovars from 15 serogroups serologically in 15 localities of El Salvador. In 17.5% of the sera the following reactions were found with serovars of 13 serogroups: Australis 6.8%, Pomona 5.5%, Grippotyphosa 3.2%, Icterohaemorrhagiae and Tarassovi each 2.1%, Javanica, Canicola, Pyrogenes, Cynopteri, Autumnalis, Sejroe, Hebdomadis, Bataviae, Shermani, between 0.2%-1.4%. Men showed a 18.5% and women 17.0% positive reaction. Positivity increases with an increase in age, an increase was shown from 11.5% in the group of up to 10 years, to 40.4% in the group of 51 to 60 years, in the last age group of over 60 years a decrease was shown of 34.7%. In 8 localities we were able to compare the serological positivity of the population, the highest percentages were found in Fey Esperanza 35.1%, San Jose de la Montana 31.6% and Domus Maria 27.8%, the lowest in Credisa 6.4% and Ametepec 7.6%.