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( Md. Aftabuzzaman ),( Hector Espiritu ),( Seon-ho Kim ),( Lovelia Mamuad ),( Su-jeong Jin ),( Sang-suk Lee ),( Yong-il Cho ) 한국동물위생학회 2021 韓國家畜衛生學會誌 Vol.44 No.4
The study characterized Trueperella pyogenes (T. pyogenes) from caseous lymphadenitis (CLA) in Korean native goats (KNG). CLA samples (n=191) were obtained from abattoir-slaughtered KNG. Pus were obtained and Corynebacterium pseudotuberculosis was detected by PCR using PLD gene. Three PLD-negative samples (1.57%) from supramammary lymph node were subjected to bacterial culture. Isolates were identified using 16S rRNA and biochemically characterized by APIZYM. Phylogenetic and biochemical analyses identified the isolates as T. pyogenes, and have shown separate clusters and varied enzyme reaction, suggesting genotypic and phenotypic diversity. This first report of T. pyogenes -induced CLA in KNG provided information for further investigations.
( Jaylord M. Pioquinto ),( Md. Aftabuzzaman ),( Edeneil Jerome Valete ),( Hector Espiritu ),( Seon-ho Kim ),( Su-jeong Jin ),( Gi-chan Lee ),( A-rang Son ),( Myunghwan Jung ),( Sang-suk Lee ),( Yong-i 한국동물위생학회 2023 韓國家畜衛生學會誌 Vol.46 No.4
Caseous lymphadenitis (CLA) is an endemic but not well-studied disease of Korean native goats (KNG) in Korea. Corynebacterium pseudotuberculosis is the causative agent of the contagious and chronic CLA found in goats. This study aimed to validate the potential risk factors associated with CLA and assess its seasonal prevalence to mitigate this disease in KNG. Data were collected through a questionnaire from four high- and four low-prevalence farms randomly selected based on a prior investigation. The monthly assessments of CLA were conducted in a goat abattoir located in Jeonnam Province, Korea, to evaluate its seasonal prevalence. The associated risk factors for CLA in KNG herds imply that herd size, scratching against pillars, pipes, or walls in the herd, and disinfection of goat herds are potential risk factors for CLA (P<0.05). The type of floor and entry of new goats into the herd, which are potential risk factors, affected CLA prevalence in the KNG herd (P <0.2). The prevalence of CLA in KNG was significantly higher in spring (29.34%) than in autumn (14.61%), summer (15.31%), and winter (19.48%) (P <0.05). Based on the risk factor assessment, attention should be to establishing accurate preventive measures by avoiding these identified potential risk factors.