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An outbreak of tuberculosis due to Mycobacterium bovis in a herd of Arabian oryx (Oryx leucoryx) was managed by sanitary and medical measures. The sanitary measures included the isolation of infected animals, the monitoring of animals with a range of diagnostic tests and the hand-rearing of the progeny of the infected herd. All the infected oryx were treated with a mixture of isoniazid at 10 mg/kg bodyweight, ethambutol hydrochloride at 15 mg/kg bodyweight and rifampicin at 10 mg/kg bodyweight administered daily in the drinking water. These measures resulted in the cessation of mortalities, a decrease in the numbers of moderate and high risk animals and the production of tuberculosis-free animals for reintroduction into the wild.
Vet Rec 1994 Feb 12
PMID:An outbreak of tuberculosis in a captive herd of Arabian oryx (Oryx leucoryx): management. 816 Mar 30

An outbreak of tuberculosis induced a mortality of 25 per cent in a captive herd of Arabian oryx (Oryx leucoryx). The diagnostic screening tests used on live animals included the comparative skin test, indirect and comparative ELISA tests and lymphocyte transformation tests. Difficulties in the interpretation of these tests stemmed principally from the facts that false negatives and false positives were encountered and that the threshold of positivity was difficult to establish with the ELISA test. The presence of other mycobacterial infections in the environment was almost certainly a complicating factor.
Vet Rec 1994 Jan 29
PMID:An outbreak of tuberculosis in a captive herd of Arabian oryx (Oryx leucoryx): diagnosis and monitoring. 817 71

The literature relating to feline mycobacterial disease is reviewed and 19 cats with tuberculosis caused by a previously unknown strain of mycobacterium are discussed. The bacteria were found to have characteristics between those of Mycobacterium tuberculosis and M bovis. The paper considers the clinical signs, epidemiology and diagnosis of the cases, and discusses the possible origins of the organism, treatment regimens and zoonotic potential.
Vet Rec 1996 Jan 20
PMID:Feline tuberculosis: a literature review and discussion of 19 cases caused by an unusual mycobacterial variant. 862 29

The performance of an indirect ELISA for diagnosing Mycobacterium bovis infection in live badgers was evaluated by examining blood samples collected from 1982 badgers captured during statutory badger removal operations in south west England. The Validity of the test and the factors affecting the prevalence of infection are described. The sensitivity of the ELISA was 40.7 percent, its specificity was 94.3 percent, the predictive value of a positive test was 67.5% percent and the predictive value of a negative test was 84.6 percent. Its sensitivity was significantly higher in males and animals with gross lesions typical of tuberculosis. The sensitivity and positive predictive values were enhanced when the results were grouped by control operation. Variables of significance for prevalence were the county, the time of year, the age and sex of animal, and the time after the start of a control operation. The possible use of the ELISA as a screening test is discussed.
Vet Rec 1995 Nov 25
PMID:Evaluation of an ELISA for Mycobacterium bovis infection in badgers (Meles meles). 864 33

A histological examination of a biopsy from a firm submandibular mass in a seven-year-old domestic short-haired cat revealed a granulomatous lymphadenitis associated with the presence of small numbers of acid-fast bacilli. The cat was euthanased and subjected to a detailed post mortem examination which revealed extensive granulomatous inflammation in the right and left bronchial, para-aortic, mesenteric and colic lymph nodes, with small or early lesions in the lung and Peyer's patches of the ileum. Mycobacteria were isolated from the submandibular, mesenteric and cervical lymph nodes. The bacilli reacted with a DNA probe specific for the tuberculosis complex, including Mycobacterium tuberculosis and M bovis, but had cultural characteristics intermediate between these two species. The pathological findings are compared with previous reports of mycobacterial infections in cats, and the public health implications are discussed.
Vet Rec 1996 Jan 27
PMID:A pathological study of a mycobacterial infection in a cat caused by a variant with cultural characteristics between Mycobacterium tuberculosis and M bovis. 865 Aug 93

Samples from four dogs and four cats suspected of having tuberculosis were processed for histopathology, bacterial culture and polymerase chain reaction (PCR). A simple, rapid method for the extraction of DNA from tissue samples was used in two PCR assays designed to confirm the diagnosis of tuberculosis. The PCR assays detected all the culture-positive samples from these animals and no false positive results were obtained. The PCR technique was successful for the direct detection of organisms from the Mycobacterium tuberculosis complex and reduced the time needed for a diagnosis to two days.
Vet Rec 1996 Mar 23
PMID:Use of polymerase chain reaction in the diagnosis of tuberculosis in cats and dogs. 871 84

This paper is the first report of systemic tuberculosis involving the eyes in a horse. The animal lost condition and gradually became increasingly blind in both eyes; it was eventually euthanased. The pathological findings included bilateral, mycobacterial granulomatous uveitis with unilateral retinal detachment and necrosis, and disseminated, mycobacterial granulomatous foci in the myocardium, lungs, bronchial lymph nodes, kidneys, liver, pancreas, colon and visceral serosal surfaces, with the most extensive lesions in the myocardium. The mycobacteria were identified as Mycobacterium avium.
Vet Rec
PMID:Ocular tuberculosis in a horse. 946 85

Serological assays may help to identify animals in advanced stages of bovine tuberculosis, but most of the tests available have suboptimal sensitivities and specificities. This study was designed to determine whether the antibody responses to defined antigens (rMPB70, rMPB64 and rMPB59) of Mycobacterium bovis at the immunoglobulin subclass level could be used to develop improved serological tests. In experimentally infected cattle it was found that the predominant serum antibody response was to rMPB70, and that an IgG1 response to this antigen was boosted strongly by skin testing. Studies in naturally infected cattle suggested that this memory IgG1 anti-rMPB70 response may be able to differentiate between skin test-reactor animals with and without lesions by comparing the ratio of the antibody response before and after skin testing. The study has provided a clearer understanding of the kinetics of antibody responses to defined mycobacterial antigens at the subclass level in bovine tuberculosis and has made it possible to develop a novel ELISA system which may be useful in disease diagnosis.
Vet Rec 1998 Mar 21
PMID:Mycobacterial antigen-specific antibody responses in bovine tuberculosis: an ELISA with potential to confirm disease status. 956 95

The lungs and kidneys of 15 badgers which had no visible lesions of tuberculosis but from which Mycobacterium bovis was isolated from pooled collections of lymph nodes were serially sectioned. Lesions of tuberculosis were detected by histopathology in the the lungs of 13 and in the kidneys of one of them. The lesions were mostly typical early stage granuloma-lesions which were considered to be the primary foci of infection. These lesions suggest an early containment phase of arrested development previously not observed and provide further evidence on which to propose a hypothesis for the pathogenesis of tuberculosis in the badger.
Vet Rec 1998 Jun 27
PMID:Role of infected, non-diseased badgers in the pathogenesis of tuberculosis in the badger. 968 28

The upper respiratory tract surfaces, the palatine and pharyngeal tonsils and associated lymph nodes of 32 tuberculin reactor cattle were examined pathologically and bacteriologically. Tuberculous lesions were observed histologically in the palatine tonsils of five animals and in both the palatine and pharyngeal tonsils of a sixth. Mycobacterium bovis was cultured from the tonsils of four of these animals and from the palatine or pharyngeal tonsils of a further eight cattle in which no lesions were observed. The upper respiratory tract surfaces of 10 animals were M bovis-positive.
Vet Rec 1999 Feb 06
PMID:Tonsillar lesions in cattle naturally infected with Mycobacterium bovis. 1007 60


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