Serological and pathogenic characterization of Erysipelothrix rhusiopathiae isolates from tonsils of slaughter pigs in Indonesia.

Abstract

Erysipelothrix rhusiopathiae was isolated from tonsils of 245 (35.7%) of 687 apparently healthy slaughter pigs in Indonesia during the period of June 1987 to February 1988. A total of 150 of the 245 E. rhusiopathiae isolated could be serotyped within the 22 recognized serotypes. Serotype 2 was most prevalent with 23.7%, followed by Serotypes 11, 12, 1a, 5 and 6 representing 7.3, 5.3, 4.9, 4.9 and 4.1% of the isolates, respectively. The nine other serotypes (Serotypes 1b, 3, 4, 8, 9, 10, 13, 19 and 22) combined to make up 11.0% of the isolates. Antibiotic-resistant strains were not found. Of 86 selected isolates belonging to various serotypes, 76 (88.4%) were highly virulent for mice (LD50 less than 10(3.0) colony-forming units). In swine, 40 (51.2%) of 78 isolates induced local or generalized urticarial lesions after intradermal inoculation, and the remaining 38 isolates induced no clinical signs. Of 76 isolates used for challenge in the cross-protection study, 29 (38.2%) killed greater than 40% of mice immunized with an erysipelas bacterin marketed in Indonesia. A tendency to be refractory to the bacterin-induced immunity was observed in some isolates of various serotypes, but this characteristic was not consistent.

• Authors: T Takahashi, K Zarkasie, S Mariana, Sumadi, M Ogata
• Journal: Veterinary microbiology (Vet Microbiol) Vol. 21 Issue 2 Pg. 165-75 (Dec 1989) ISSN: 0378-1135 [Print] Netherlands
• PMID: 2609500 (Publication Type: Journal Article)

Topics

• Animals
• Cross Reactions
• Erysipelothrix (classification, immunology, pathogenicity)
• Erysipelothrix Infections (microbiology)
• Female
• Indonesia
• Mice
• Palatine Tonsil (microbiology)
• Serotyping
• Swine
• Swine Erysipelas (microbiology, prevention & control)
• Vaccination