Among 7, 610 cattle necropsied in Miyazaki University, intestinal atresias were observed in 166 calves, including114 with anorectal anomalies, 49 with colonic atresia, two with jejunal atresia and one with ileal atresia.Ninety-nine of 114 (86.84%) calves showing anorectal anomalies had associated defects including fistula to theurogenital tract in 44, other deformities of the urogenital system in 49, congenital cardiac disease in 43 andspinal abnormalities in 34 calves. The incidence of colonic atresia in Holstein cattle was 3.11% and was higherthan the 0.07% in Japanese Black cattle.
This study was conducted to investigate the minor hoof and leg diseases in dairy cows at hoof treatment. Inthe tie-stalls, the prevalence of heel horn erosion in both hind lateral and medial claws, sole hemorrhages andwhite zone lesions in the hind lateral claws and periarthritis in the hind limbs were high. In the free-stalls, theprevalence of heel horn erosion in both fore and hind limbs, sole hemorrhages and white zone lesions in thehind lateral claws were high. Next, the relationship with environmental factors contributing to those diseaseswas analyzed using multiple logistic regression. As a result of an analysis in the tie stalls, such as having nomaterial spread on the floor of the cubicle, the risk of heel horn erosions, white zone lesions, and sole hemorrhagesincreased. The risk of heel horn erosions and white zone lesions rose because of the wet floor in thecubicles, attributable to feces and urine. Other factors that elevated the risk of sole hemorrhages and periarthritisinvolved the short cubicle floor and the difference between the cubicle floor and the excreta ditch, andthe risk of sole hemorrhages was brought about by the narrow interval between the floor and the partition. Ananalysis of the environmental factors in the free stalls found that the risk of heel horn erosions and white zonelesions and sole hemorrhages increased when the floor was made wet from feces and urine.
Pathological studies were performed on 18 pigs diagnosed with postweaning multisystemic wasting syndrome (PMWS) at Tochigi for an investigation of the relationships between porcine circo virus type 2 (PCV2) antigen and lymphocyte depletion. Pigs affected with PMWS showed lymphocyte depletion, mononuclear cellsinfiltration, multinucleated giant cells and numerous inclusion bodies in lymphoid tissues. The amount of PCV2antigen was correlated positively with the degree of B lymphocyte depletion and lymphoid lesions.
A newborn Japanese black calf, calved from an 11-year old cow, presented with arthrogryposis of the hindlimbs, nystagmus, and gyration of its head immediately after birth. Necropsy revealed some anomalies of theoccipital bone and central nervous system. The occipital squama was flattened and the foramen magnum wasenlarged. The cerebellum could not be found and occipital lobe of cerebrum was stretched. Spina bifida occultawas present in the sacrum. Histopathlogically, the aqueduct of the Sylvius and the central canal of the medullaoblongata was opened dorsally. Based on these findings, a diagnosis of Arnold-Chiari malformation (ACM) was made. Compared with other bovine ACM cases reported in the past, ACM was thought to have resultedfrom a failure of epithelio-mesenchymal interactions at organogenesis. This may have caused the abnormalneural tube formation and anomaly of the cell migration of the mesenchyme, and those anomalies may in turnhave caused spina bifida and dysplasia of the cerebellum, cranium and vertebra. It was also thought that theabnormal shape of cerebrum was related to the dysplasia of the cerebellum.
The levels of fecal progesterone of Mexican hairless pigs (laboratory miniature pig; adult female), in whichestrous signs are not clearly evident, were measured using a commercial bovine milk progesterone quantitative EIA kit. In six of eight pigs, the pattern of fluctuations of fecal progesterone was similar to that of swinewith normal estrous signs. An appropriate mating period was estimated for the six pigs based on the changein fecal progesterone level, and artificial insemination was performed accordingly. As a result, four of the sipigs conceived and gave birth. These findings suggest that estimating estrous cycles based on the measurementof fecal progesterone levels is effective for the reproduction of Mexican hairless pigs with unclear estroussigns, and that a commercial bovine milk progesterone quantitative EIA kit can be used for this measurement.
The total ear canal ablation and lateral bulla osteotomy (TECABO) technique was performed on dogs withotitis media. All examined dogs had a severely stenosed or occluded ear canal. Swab specimens were obtainedin the vertical ear canal prior to operation, and in the tympanic cavity during surgery. Isolates from the verticalear canal and tympanic cavity were then compared for each ear. In all cases, the kinds of bacteria isolatedfrom these two parts were the same or the kinds of isolates from the tympanic cavity included those from thevertical ear canal. The susceptibility patterns of these isolates from both parts tended to be almost identical.The paper suggests that when TECABO is performed, data on the susceptibility patterns of isolates from thevertical ear canal can be used until the susceptibility patterns of bacteria obtained from the tympanic cavity areidentified.
A survey of leptospiral antibodies against five serovars, icterohaemorrhagiae, canicola, autumnalis, hebdomadis and australis was performed on 411 house dogs presented to veterinary hospitals in Shiga Prefecturefrom 2004 to 2005. All the dogs examined were clinically normal and did not have the vaccinations against leptospirosis.Leptospiral antibodies were detected in 11.4% of dogs (47/411). The serovars icterohaemorrhagiae (8.5%), canicola (3.2%), hebdomadis (2.7%), autumnalis (2.4%) and australis (0.2%) were detected in positive samples.The incidence in older dogs tended to be higher than that in younger dogs. No significant associationwas found between the incidence and factors such as sex and living environment (indoor/outdoor) of the dogs.