Veterynarna biotehnologija – Veterinary biotechnology, 2016, 28, 125-133 [in Ukrainian].
Institute of Veterinary Medicine of NAAS
ETIOLOGICAL STRUCTURE OF LEPTOSPIROSIS IN PIGS IN FARMS OF UKRAINE
Introduction. Leptospirosis in pigs implicates significant economic losses both in high mortality of animals, weight loss, slowing the growth of young animals, loss of offspring, abortion, violation of reproductive functions and spending significant funds for diagnostic, preventive, therapeutic and quarantine measures.
The goal of the work. To analyze the epizootic situation on leptospirosis in pigs and to determine the etiological structure of the most common serogroups of Leptospira circulating in Ukraine during 2012–2015.
Materials and methods of the research. Sera of pigs were used for the research that came to the laboratory of Leptospirosis with the Museum of Microorganisms of the Institute of Veterinary Medicine of NAAS from different regions of Ukraine during 2012–2015. Serological studies were conducted by MAT using antigens of eight serogroups of Leptospira.
Results of the study and discussion. During the analyzed period we have studied in MAT and analyzed 1119 samples of blood sera of pigs from farms and different regions of Ukraine, received 457 positive responses that is 40.8% of the total amount of samples. Leptospirosis infection in pigs for the period of research was at the highest level in 2013 and amounted to 58.1%. During 2012, 2014 and 2015 the positive results obtained at relatively the same level that was 31.9%, 41.9% and 40.3% respectively. Analysis of the research indicates the circulation of leptospirosis in pigs in farms of Ukraine, as evidenced by the percentage of positively reacting pigs to the MAT that was 40.8% of the investigated samples.
Conclusions and prospects for further research. Leptospirosis in pigs is much prevalent in Ukraine. Average rate of Leptospira infection in pigs (2012–2015) was 40.8% of the investigated samples. It was revealed that during the research period the most common Leptospira serogroups among pigs in Ukraine were Icterohaemorrhagiae, Australis (serovar bratislava) and Pomona, their rates were 61.1%, 20.4% and 22.5%, respectively of the total amount of positively reacting animals in MAT. The prospect of further research is an extension of etiological structure of leptospirosis of pigs that can be used for the improvement of vaccine development and diagnostics.
Keywords: leptospirosis, monoreactions, mixed reactions, etiology, pigs.