摘要:

The carcasses of 370 very young slaughter calves condemned for various diseases and defects at routine post-mortem meat inspection were subjected to further and more detailed macroscopic examination as well as histopathological examination of some tissues. Of the carcasses examined, 138 were condemned for “navel ill”, and in the majority of these cases the lesions extended beyond the umbilicus, particularly involving the umbilical vein and the urachus. Enzootic pneumonia was the most common cause of pleuritic lesions in the carcass, and 75 carcasses were condemned for this lesion. Arthritis, whether localised or involving a number of joints, was the primary lesion in 32 carcasses. Focal interstitial nephritis was observed in the kidneys of 36 carcasses, while 23 carcasses were condemned for wounds and bruising. A number of other miscellaneous diseases and defects, including generalised peritonitis, jaundice, hepatic abscesses and “fever”, were observed at low rates in condemned carcasses. Resolution or localisation of lesions had occurred at the time of slaughter on average in 35% of the condemned carcasses and the judgment of total condemnation was difficult to justify on a scientific basis and would not have been applied to other classes of slaughtered livestock. In the case of wounds and bruising, 95.6% of the carcasses could have been trimmed. There was also considerable variation in the likely pathogenesis and systemic effects of the diseases and defects observed. A need for clear and specific judgment criteria to be applied to the carcasses of very young slaughter calves at post-mortem meat inspection was identified.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35801

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Tuberculosis caused byMycobacterium boviswas diagnosed in 36 of 68 (53%) brushtail possums (Trichosurus vulpecula) trapped in August 1992 from a population of exceptionally low density (trap catch <3%) on a forest-scrub margin in Westland, New Zealand. The prevalence of tuberculosis in possums, based solely on gross lesions, was at least twice that previously recorded in New Zealand, and was about seven times that recorded from the same population in 1980. More male (66%) than female (33%) possums had grossly visible tuberculous lesions. The distribution of infection appeared continuous along the forest-scrub margin. Both stoats (Mustela erminea) and one of six hares (Lepus europaeus occidentalis) trapped were also infected withM. bovis.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35802

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Sickness and deaths associated with leptospirosis were reported in three lamb flocks in the Manawatu region. The clinical, pathological and serological features ofLeptospiru interrogansserovarpomonainfection are described. The mucous membranes of affected animals were pale and jaundiced. Haemoglobinuria, haemoglobinaemia and centrilobular hepatocellular necrosis were also consistent findings. All clinically sick lambs had very high titres in the microscopic agglutination test for L.pomona. Circumstantial evidence of pigs being the source of infection was found in one of the three cases.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35803

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Osteochondrosis is reported in association with copper deficiency in young red deer and wapiti x red deer hybrids on eight deer farms throughout New Zealand. On two farms, more than 30% of fawns were affected. Affected animals were lame, often had one or more swollen joints, and in some cases had an abnormal “bunny-hopping” gait or “cow-hocked” stance. Lesions were most common in the carpal, tarsal, stifle and hip joints, and were usually bilateral. Defects in articular cartilage ranged from loose flaps to complete separation with exposure of subchondral bone and the presence of cartilage fragments within the joint space. In advanced cases, the joints had features of degenerative arthropathy. Bilateral epiphyseolysis of the femoral head was observed in some severely lame deer. All deer with osteochondrosis had low serum and/or liver copper concentrations.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35804

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Two adult female geckoes (Hoplodactylus maculutus) from the National Wildlife Centre, Mt Bruce, Masterton, died within the period of a month and were presented to the Department of Veterinary Pathology and Public Health at Massey University for necropsy. The first gecko had numerous 1–2 mm diameter punctate ulcers of the skin over the ventral and dorsal regions of the body. The second animal had slight discolouration of some of the scales. Skin swabs were taken from each case for culture. There were no other gross lesions apparent at necropsy. Histologically, the only lesions in the first gecko were areas of epidermal and dermal ulceration involving fungi and bacteria. In the second gecko, there was limited inflammation in the skin, but in the lungs there was necrosis of the pulmonary septae and constituent muscle bundles caused by fungi whose septate mycelia extended into adjacent large blood vessels and caused mycotic thrombi; hyphae were also found in the spleen and liver.Paecilomycessp. septate fungus was recovered from both geckoes andPseudomonasspp. and a mixed Gram-negative flora were recovered from the cutaneous lesions on culture. The death of the first gecko was considered to be due to widespread ulcerative dermatitis, while that of the second gecko was thought to be due to mycotic pneumonitis and mycotic septicaemia. It is believed that environmental factors, such as cold temperature and high humidity, contributed to a reduction in the immune response in the affected geckoes, with the consequent development of overwhelming fungal infections.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35805

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

The humoral antibody responses of 82 domestic cats to the common commensal bacteriaPasteurella multocidaandStaphylococcus aureuswere measured by an indirect immunofluorescence assay to give a subjective quantification of specific IgG in serum. There was no significant difference in specific serum IgG levels between sick cats which tested antibody-positive to feline immunodeficiency virus or antigen-positive to feline leukaemia virus and sick, virus-negative cats.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35806

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

An analysis of veterinary diagnostic cases submitted to the Batchelar Animal Health Laboratory for faecal egg count reduction testing in sheep between 1986 and 1992 showed that 63% of them originated from properties carrying anthelmintic-resistant worms. Most of these cases involved resistance to a single drench type only, with the benzimidazoles being implicated most frequently. Overall, the figures suggested a frequency of occurrence of resistance to benzimidazole anthelmintics of 74%, to levamisole-type anthelmintics of 23% and to benzimidazole-levamisole combinations of 30%. No cases of resistance to milbemycin/avermectin-type drenches were recorded.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35807

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

This study examines the possible outcome of adopting criteria recommended by the Australian Working Party for defining anthelmintic resistance by the faecal egg count reduction test, namely a mean percentage reduction of less than 95%, together with a lower 95% confidence limit of less than or equal to 90%.

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35808

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35809

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor

摘要:

Extract

ISSN:0048-0169    

DOI:10.1080/00480169.1994.35811

出版商:Taylor & Francis Group    

年代:1994

数据来源: Taylor