1997, Number 3
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ABSTRACTNumerous cryptosporidia were observed in the microvillous border of epithelial cells of the lower portion of the small intestine in three 10 week old piglets. These findings were associated with severe villous atrophy and mild lymphoid infiltration in the lamina propia. Furthermore, there was mild interstitial cuffing pneumonia compatible with Mycoplasma infection in all of these cases. Bacteriological studies were negative to Salmonella, enteropathogenic strains of Escherichia coli and Pasteurella. These pigs belonged to a crowded herd with bad sanitation, and were subjected to massive treatments with several antibiotics. Although a main pathological role of Cryptosporidium cannot be attributed in this study, this protozoal infection could be involved in the development of intestinal lesions. Cryptosporidiosis has been previously reported in calves in Mexico, but this is the first report in pigs.
Argenzio, RA., Liacos, J.A., Levy, M.L., Meuten, D.J., Lecce, J.G. and Powell, D.W.: Villous atrophy, crypt hyperplasia, cellular infiltration and impaired glucosa-Na absorption in enteric cryptosporidiosis of pigs. Gastroenterology, 98: 1129-1140 (1990).
Carter, G.R.: Diagnostic Procedures in Veterinary Bacteriology and Mycology. 3rd ed. Charles C. Thomas, Springfield, Illinois, 1979.
Cowan, S.T. y Steel, KJ.: Manual para la Identificación de Bacterias de Importancia Médica. 2a ed. CECSA, México, D.F., 1979.
Eisenstein, B.I.: Bacterial variation and antibiotic action. In: Advances in Internal Medicine. Vol. 26. Edited by: Stollerman, G.H., 393-426. Year Book Medical Publishers, Chicago, Illinois, 1980.
Freter, R.: Mechanisms of bacterial colonization of the mucosal surfaces of the gut. In: Virulence Mechanisms of Bacterial Pathogens. Edited by: Roth, J.A., 45-60. American Society for Microbiology, Washington, D.C., 1988.
González, M.C., Gómez, E.S. y Aluja, S.A.: Cryptosporidiosis en bovinos lactantes (histología, microscopía electrónica de transmisión y de barrido). Vet Méx., 14: 12-22 (1984).
Holland, R.E.: Some infectious causes of diarrhea in young farm animals. Clin. Microbiol, Rev., 3: 345-375 (1990).
Lindsay, D.S. and Blagburn, B.L.: Cryptosporidium parvum infections of swine. Compendium, 13: 891-894 (1991).
Lindsay, D.S., Blagburn, B.L. and Stuart, B.P.: Coccidia and other protozoa. In: Diseases of Swine. 7th ed. Edited by: Leman, A.D., Straw, B.E., Mengeling, W.L., D´Allaire, S., Taylor, D.J., 660-667. Iowa State University Press, Ames, Iowa, 1992.
Mills, K.W., Phillips, R.M., Kelly, B.S. and Baughman, G.L.: Using enzyme-linked immunosorbent assay to detect Escherichia coli K88 pili antigens from clinical isolates. Am. J. vet Res., 43 365-367 (1982).
Moon, H.W. and Woodmansee, D.B.: Cryptosporidiosis. J. Am. vet. med. Ass., 189: 643-646 (1986).
Moore, R., Tzipori, S., Griffiths, J.K., Johnson, K., Montigny de, L. and Lomakina, I.: Temporal changes in permeability and structure of piglet ileum after site-specific infection by Cryptosporidium parvum Gastroenterology, 108: 1030-1039 (1995).
Paul, P.S. and Stevenson, G.W.: Rotavirus and reovirus. In: Discases of Swine. 7th ed. Edited by: Leman, A.D., Straw, B.E., Mengeling, W.L., D´Allaire, S., Taylor, D.J., 331-348. Iowa State University Press, Ames, Iowa, 1992.
Saif, L.J. and Wesley, R.D.: Transmissible gastroenteritis. In: Diseases of Swine. 7th ed. Edited by: Leman, A.D., Straw, B.E., Mengeling, W.L., D´Allaire, S., Taylor, D.J., 362-386. Iowa State University Press, Ames, Iowa, 1992.