Soroprevalência de leptospirose em bovinos leiteiros do município de Realeza - PR

Abstract

The municipality of Realeza is located in Paraná southwestern region, the main dairy region in a state of volume. The dairy farming in the city is an important activity of family farming. Soon, the herd health care should be, whenever possible, improved in order to minimize the production losses. It is therefore important to know the prevalence of certain diseases that affect dairy herds in the region. Among them is the Leptospirosis, which can infect farm animals causing various disorders, especially reproductive such as infertility, miscarriage, birth of weak calves and also the temporary decrease in milk production. Moreover, Leptospirosis is characterized as zoonosis by being capable of infecting humans. In this way, the objective of this project was to determine the seroprevalence of Leptospirosis in dairy herds of the municipality of Realeza - PR. In total, samples were used 341 cows from 20 properties. Sera were submitted to Leptospirosis diagnostic test in Brucellosis Diagnostic Laboratory and Leptospirosis, Department of Preventive Veterinary Medicine and Animal Reproduction of UNESP Jaboticabal - SP, through microscopic agglutination technique. They were evaluated antibody titers against 24 Leptospira spp. Of these, only 18 serotypes tested had at least one positive sample: Andamana, Australis, Bratislava, Autumnalis, Butembo, Canicola, Cynopteri, Grippotyphosa, Hebdomadis, Copenhageni, Icterohaemorrhagiae, Panama, Pomona, Pyrogenes, Hardjo, Wolffi, Patoc and Shermani. The serovars Castellonis, Bataviae, Whitcombi, Sentot, Javanica and Tarassovi showed no agglutination in any serum sample. The evaluated results showed a seroprevalence of 37.53% positive animals. This number indicates that different serotypes of the pathogen are present in dairy herds of the municipality, which may be causing harm. Assessment of the spatial distribution of serovars and data on properties with infected animals and uninfected, should allow a more detailed analysis of the epidemiological profile. Thus, it would be possible to detect possible risk factors that may contribute to understanding the seroprevalence of Leptospirosis in dairy herds in the municipality of Realeza - PR.