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Bulletin No. 17 - Winter 2003
Parasitology- No Category
ZIZLAVSKY M, LUKESOVA M, SMITKA Z, SVOBODOVA L
Disease surveillance of lesions in pigs at slaughterhouses during period 1996-2002 in the Czech Republic.
Proceedings of the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology, New Orleans, Louisiana, August 10-14, 2003, page 138
Pathological lesions in pigs brought to slaughterhouses were monitored in order to study the prevalence of economically important subclinical swine diseases between 1996 and 2002 in the Czech Republic. The skin of slaughtered and scalded pigs was examined for papular dermatitis caused by Sarcoptes scabiei var.suis infections (total number = 23,108 slaughtered pigs). The severity of skin findings was scored 0 to 3 in compliance with the ADS methodology Pointon (1992). The liver of slaughtered pigs were examined for milk spots caused by the development of Ascaris suum (total number = 41,894 slaughtered pigs). The severity of the disease was scored 0 (no milk spots), 1 (1-4 spots), 2 (5-15 spots) and 3 (16 and more spots). For each herd, the average milk spot score (AMSS)-designed by Zizlavsky (2000)- was calculated. In the past six years, positive health development has also been recorded in the prevalence of milk spots on the liver and the hypersensitive form of sarcoptic mange. The milk spots prevalence was 43,70% (n=3,798) in 1996-1997, later 31,20% (n=21,578) in 1999-2000, 20,00% (n=11,037) in 2001 and 18,68% (n=5,481) in 2002. The mange prevalence was 54,10% (n=5,007) in 1996-1997, than 9,02% (n=11,258) in 1999-2000, later 6,80% (n=5,098) in 2001 and 8,60% (n=1,745) in 2002. Compared with the 1996-1997 period (ADS=0,620), the consumption of peroral and parenteral endectocides in 1999-2000 increased by about 10 % (ADS=0,110) - the number of sows in breeding herds in the Czech Republic dropped by 8 %. During the year 2001 was observed ADS=0,08 ! A major reason for that probably has been the launch of effective antiparasitary programmes as a necessary fundamental veterinary measure on pig farms. In the year 2002 were used the popular equivalents of avermectins (ADS=0,101) with the same patterns like doramectin and the different effectivity.
