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Incidence of Yersinia enterocolitica 4/O:3 in pigs of Latvian origin at slaughtering
2007
Terentjeva, M., Latvia Univ. of Agriculture, Jelgava (Latvia) | Berzins, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Liepins, E., Latvia Univ. of Agriculture, Jelgava (Latvia)
A total amount of 90 pig tonsil samples were investigated to detect presence of Y.enterocolitica 4/O:3. Samples were collected in two large-scale Latvian slaughterhouses from five pig herds during February and March, 2006. Samples were investigated with direct plating onto selective CIN agar plates according to ISO 10273 method, with subsequent cold enrichment for 2 weeks at 4 deg C in accordance with NMKL 117 method. Y.enterocolitica positive isolates were investigated for pyrazinamidase and lipase activity, indole production and salicine, xylose, trehalose fermentation. Slide agglutination reaction with commercial antisera O:3 was carried out for detection of Y.enterocolitica sevovars. Pathogen was isolated from all five herds with 30% mean prevalence. Incidence of Y.enterocolitica 4/O:3 depending on herd varied from 20 to 45%. High incidence of Y.enterocolitica in pig tonsils indicates that animals are important reservoir of this pathogen in Latvia. Further studies about incidence of Y.enterocolitica pathogenic bioserotypes in pig population and contamination pattern with pathogen in slaughterhouses are needed.
اظهر المزيد [+] اقل [-]Changes of biology of the potato late blight pathogen Phytophthora infestans in last years. Review
2002
Bimsteine, G. (Latvia Univ. of Agriculture, Jelgava (Latvia))
Potato is the second important crop in Latvia. The area covered with potato is about 50 thousand hectares. Potato late blight caused by Phytophthora infestans (Mont.) de Bary is the most serious potato disease. Weather conditions in Latvia are very favourable for the development of potato late blight and it is occuring almost every year. The biology of P.infestans was the subject of a number of authors - plant pathologists. Research results about P.infestans population biology and epidemiology are presented in this review, especially focusing on the changes of pathogen biology.
اظهر المزيد [+] اقل [-]Cassava bacterial blight, caused by Xanthomonas axonopodis pv. Manihotis
2012
Verdier, Valerie M. | López Carrascal, Camilo Ernesto | Bernal, Adriana Jimena
