A 6-day-old calf with debility and weakness showed suppurative lesions in the cecum, liver, cerebrum and eyes at autopsy. Enterobacter cloacae antigen-positive organisms were detected in the suppurative lesions and the organism was isolated. On the other hand, immunohistochemistry revealed in lesions of catarrhal enteritis organisms attached to the epithelial cells, which were E. coli (026) antigen-positive and considered to be attaching and effacing Escherichia coli (AEEC). These findings indicated that the calf was concurrently infected with AEEC and E. cloacae.
A 3-month-old female calf of Japanese brown suffering from chronic dearrhea was euthanatised at 8 months of age and showed gross finding similar to Johne's disease. Histopathology revealed the edematous thickening of ileal lamina propria with infiltration of monocytes, and the swelling of mesenteric lymph nodes. From affected mesenteric lymph nodes Mycobacterium avium complex serovar 8 was isolated, and the isolates were susceptible to cycloserine but not to ethambutol and other 8 drugs tested. It was suggested that it might be important to distinguish this disease from the Johne's disease.
Of 34 Holstein-Friesian cattle in a dairy farm, 9 cows, 2 heifers and 3 calves showed anorexia, fever and muddy diarrhea, and Salmonella Virchow was isolated from feces of 14 cows and 3 calves. After treating with antibiotics and others, clinical signs were improved, and the organism was not detected 4 months later. The unhygienic environment, unbalanced feeding, Fasciola hepatica parasitism and tuberculin tests made on the day before that of the onset might be related with the occurrence.
The cotton-type and suspension of chitosan were applied to 144 cases of septic pododermatitis including sole ulcer, 41 cases of interdigital phlegmon, 43 cases of abscess, 17 cases of wound, 12 cases of tarsal cellulitis and 3 cases of arthritis in cattle. Significant effect was seen in 250 out of 260 (96%) cases.
An imaging system consisting of singl-screen/single-emulsion film (single system) for bone radiography in small animals was evaluated. The potential clinical use of single system has been investigated by comparing their relative speeds, resolution properties, and characteristic curves with those of conventional screenfilm systems. The single systems showed higher resolution than those of conventional systems under the same exposure conditions. Clinical radiographs indicated that the single systems can improve image resolution than those of conventional systems.
In 106 eyes in 53 adult dogs with normal cornea, anterior chamber, and intraocular pressure, ranging in weight from 1.7 to 23.9kg, we investigated the thickness of the cornea using an ultrasonic pachymeter. The center portion was thinner than the peripheral portion. The superior peripheral thickness was significantly thicker than the nasal peripheral thickness and, the temporal or inferior peripheral thickness. No correlation between the corneal thickness and, corneal size and component factors of the axial length of the ocular bulbus, i.e., the depth of the anterior chamber, the thickness of the lens, the axial length of the vitreous body and the total axial length.
In 212 of 419 dogs of small breeds examined in Tokorozawa and Yokohama from January to June 1994 were diagnosed as medial luxation of the patella, it was 146 bilateral and 66 unilateral. The cases were of Grades II (46.7%), I (32.7%), III (18.4%) and IV (2.2%) of the Singleton's Grading System.
Mutagenicity of resin-absorbed materials from tap water and its elimination by home water cleaners were evaluted by Ames assay with and without S9mix. CSP800-or CHPA25-absorbed materials from tap water two cities examined showed positive mutagenic activities that have coefficient variations from 30 to 50% daily. The home water cleaners tested were shown to be useful for reducing mutagens in tap water.
Rectal and cecal contents from 90 healthy cattle were examined for the distribution of verocytotoxinproducing Escherichia coli (VTEC). VTEC was detected in 38 rectal samples (42.2%) and 3 of cecal samples (3.3%). The isolates were mostly of serogroups of O22, O45, O109, O113, O145 and O153. The numbers of total bacteria and Enterobacteriaceae in the rectum were higher than these in the cecum, indicating that the rectum might be a more suitable environment to habor Enterobacteriaceae including VTEC than the cecum.