A pathological study of bovine alimentary mycosis.

A 10-year study showed that 45 of 692 cattle aged > 6 months had systemic mycosis and, of these, 38 had alimentary mycosis. The percentages of these 38 cattle with lesions in various sites were: rumen (73.7), omasum (71.1), abomasum (34.2), reticulum (21.1), intestine (15.8), omasoabomasal orifice (7.9) and tongue (2.6). Infections in both the forestomachs and abomasum occurred in 31.6 per cent; mucormycosis was found in 94.7 per cent and aspergillosis in 31.6 per cent; 26.3 per cent (10 cattle) had complicated infections with both Mucorales and Aspergillus and eight of these animals had mixed lesions of both mucormycosis and aspergillosis. Macroscopically, focal haemorrhagic necrosis was seen in all 38 cattle. Histologically, thrombosis, coagulative necrosis and hyphae typical of the order Mucorales or of Aspergillus spp. were found. Many of the cattle were also affected by ruminal acidosis-inducing factors (ruminal atony 81.6 per cent, mastitis 63.2 per cent, "downer cow syndrome" 57.9 per cent and parturition 50.0 per cent), which may have predisposed to alimentary mycosis.

[1]  S. W. Nielsen,et al.  Mycotic ruminitis in a Cow. , 1968 .

[2]  C. Dawson,et al.  Alimentary mycotic lesions in cattle: a histological and cultural study. , 1973, Journal of medical microbiology.

[3]  P. Neame,et al.  Mucormycosis. A report on twenty-two cases. , 1960, Archives of pathology.

[4]  J. Mills,et al.  Systemic candidiasis in calves on prolonged antibiotic therapy. , 1967, Journal of the American Veterinary Medical Association.

[5]  Symmers Wc Histopathologic aspects of the pathogenesis of some opportunistic fungal infections, as exemplified in the pathology of aspergillosis and the phycomycetoses. , 1962 .

[6]  Jones Je,et al.  Candida albicans infection of the forestomachs of a calf. , 1970 .

[7]  K. Ohshima,et al.  Pathological studies on mucormycosis of the forestomach and abomasum in ruminants: a report on six cases complicated with candidiasis or pulmonary aspergillosis. , 1976, Nihon juigaku zasshi. The Japanese journal of veterinary science.

[8]  Y. Hatta,et al.  Disseminated aspergillosis with lesions in the central nervous system in a calf. , 1988, Nihon juigaku zasshi. The Japanese journal of veterinary science.

[9]  K. Maddy Epidemiology and ecology of deep mycoses of man and animals. , 1967, Archives of dermatology.

[10]  K. Matsukawa,et al.  A case of bovine cerebral mucormycosis. , 1986, Nihon juigaku zasshi. The Japanese journal of veterinary science.

[11]  Davis Cl,et al.  Mucormycosis in food-producing animals: a report of twelve cases. , 1955 .

[12]  Leipold Hw,et al.  Experimentally induced ovine ruminal acidosis: pathologic changes. , 1974 .

[13]  Thomson Rg Rumenitis in cattle. , 1967 .

[14]  P. Marcato Ruminite mucormicotica nel vitello , 1969 .

[15]  Symmers Ws THE TISSUE REACTIONS IN DEEP-SEATED FUNGAL INFECTIONS. THE ROLE OF HISTOLOGICAL EXAMINATION IN MYCOLOGICAL DIAGNOSIS. , 1964 .

[16]  Saunders Lz Systemic fungous infections in animals; a review. , 1948 .

[17]  R. D. Baker,et al.  Mucormycosis of the digestive tract. , 1957, A.M.A. archives of pathology.

[18]  Shortridge Eh,et al.  Systemic phycomycosis and aspergillosis of cattle. , 1968 .

[19]  J P Neitzke,et al.  Incidence of mycotic gastritis in calves up to 30 days of age. , 1974, The Canadian veterinary journal = La revue veterinaire canadienne.

[20]  M. Littman The systemic mycoses. , 1959, The American journal of medicine.