Abstract
In a study on the involvement of Mycoplasma hyorhinis in serositis of piglets, 26 routine diagnostic animals, 3-7 weeks old, with distinct serofibrinous lesions in the pericardial, pleural and peritoneal cavities were examined. M. hyorhinis was isolated in 9 cases, non-haemolytic Escherichia coli in another 9 cases and in 4 cases both species were found. Neither of the microorganisms were found in the remaining 4 cases.
The presence of M. hyorhinis in the serous cavities in the absence of non-haemolytic E. coli was always accompanied by a diagnosis of other disease conditions, mainly of the respiratory tract. In the cases infected with non-haemolytic E. coli complicating problems were absent.
The pathogenicity of M. hyorhinis was further studied by inoculation of 2 young pigs in which the typical serofibrinous lesions of the serous cavities were produced. It therefore appears that M. hyorhinis can be regarded as a cause of polyserositis in piglets; under field conditions, however, the synergistic presence of other debilitating syndromes appears necessary for its haematogenous spread from the respiratory tract to the serous cavities.
Keywords: escherichia coli, joints, mycoplasma hyosynoviae, pericardial, pleura, peritoneal, serosa, swine
Full Text
The Full Text of this article is available as a PDF (1.2 MB).
References
- Bannerman ESN, Nicolet J. Isolation and identification of porcine Mycoplasma in Switzerland. Schweiz. Arch. Tierheilk. 1971;113:697–710. [PubMed] [Google Scholar]
- Carter GR. Observations on pleuropneumonia-like organisms recovered from swine with infectious atrophic rhinitis and Glässer’s disease. Can. J. comp. Med. 1954;18:246–251. [PMC free article] [PubMed] [Google Scholar]
- Carter GR, Schröder JD. Pleuropneumonia-like organisms associated with pneumonia in swine. Can. J. comp. Med. 1955;19:219–220. [PMC free article] [PubMed] [Google Scholar]
- Ennis RS, Dalgard D, Willerson JT, Barden JA, Decker JL. Mycoplasma hyorhinis swine arthritis. II. Morphologic features. Arthr and Rheum. 1971;14:202–211. doi: 10.1002/art.1780140203. [DOI] [PubMed] [Google Scholar]
- Friis NF. Mycoplasma hyorhinis as a causative agent in pneumonia of pigs. Acta vet. scand. 1971;12:116–119. [PubMed] [Google Scholar]
- Friis NF. DSR Forlag. 1974. Mycoplasmas in pigs with special regard to the respiratory tract. [Google Scholar]
- Friis NF, Ahrens P, Larsen H. Mycoplasma hyosy-noviae isolation from the upper respiratory tract and tonsils of pigs. Acta vet. scand. 1991;32:425–429. doi: 10.1186/BF03546943. [DOI] [PMC free article] [PubMed] [Google Scholar]
- King SJ. Porcine polyserositis and arthritis - with particular reference to mycoplasmosis and Glässer’s disease. Austr. vet. J. 1968;44:227–230. doi: 10.1111/j.1751-0813.1968.tb09090.x. [DOI] [PubMed] [Google Scholar]
- Poland J, Edington N, Gois M, Betts AO. The production of pneumonia with or without pleurisy in gnotobiotic piglets with pure cultures of strain TR32 of Mycoplasma hyorhinis. J. Hyg., (Lond.) 1971;69:145–154. doi: 10.1017/S0022172400021367. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Roberts ED, Switzer WP, Ramsey FK. Pathology of the visceral organs of swine inoculated with Mycoplasma hyorhinis. Amer. J. vet. Res. 1963;24:9–18. [PubMed] [Google Scholar]