[Swine leptospirosis in southern Backa district [The Vojvodina Province, Serbia (Yugoslavia)] in the period 1997-2001]
2002
Grgic, Z. | Vidic, B. | Savic-Jevdjenic, S. | Stojanov, I. (Naucni institut za veterinarstvo "Novi Sad", Novi Sad (Yugoslavia))
In a 5 year period 48748 swine blood samples were examined, or 24.52% of the breeding stock. The samples were examined by the method of microscope agglutination, with "live" antigen of 8 leptospira serotypes: L.pomona, L.icterohaemorrhagiae, L. grippotyphosa, L. sejroe, L. tarassovi, L. australis, L. bataviae, and L. canicola. During the investigation specific antibodies for Leptospira were diagnosed in 280 (0.57%) samples of swine sera. The highest level of seroprevalence for leptospirosis in swine was in the year 1998 with 130 (1.27%) seropositive swines. The lowest seroprevalence level was detected in the years 1999 and 2000 with only 13 seropositive animals (0.13-0.14%). During this period 3 serotypes of Leptospira were present: L.pomona, L. icterohaemorrhagiae and L.grippotyphosa. Serotype L. icterohaemorrhagiae was most present on the investigated area (in 94.32% cases), followed by L. pomona (5.31%), while serotype L. grippotyphosa appeared only sporadically in only 0.35% cases. In this period a trend of slight decrease was noticed in swine prevalence for leptospirosis amounting to 0.048% annually. Based on these analyses, it may be expected with 95% certainty that the level of prevalence for leptospirosis in the coming period in this epizootiological area will range from 0.00 to 0.82% of the infected animals.
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