Mycobacteriosis in birds

Tell, Lisa A.; Woods, Leslie; Cromie, Ruth

doi:10.20506/rst.20.1.1273

Cited by 156 publications

(184 citation statements)

References 71 publications

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“…The distribution of MAA infection determined in this study suggests that the hens became infected through the alimentary tract, which has been described in other studies as the most common route of infection (Tell et al, 2001). MAA was found by qPCR in the intestine in seven of the eleven hens examined.…”

Section: Discussionsupporting

confidence: 78%

“…The manifestation of the disease can vary, apart from the classical tuberculosis symptoms, lesions can also present themselves only in the intestinal tract. Miliary tuberculosis has been characterised previously in several cases of heavily infected birds (Thorel et al, 1997;Prukner-Radovcic et al, 1998;Tell et al, 2001). …”

mentioning

confidence: 98%

“…avium (MAA) is the etiologic agent of avian tuberculosis, a chronic contagious disease described in a wide variety of domestic and wild bird species (Thorel et al, 1997;Tell et al, 2001;Kriz et al, 2010;Skoric et al, 2010) as well as other animals Pate et al, 2009). Galliformes, in particular domestic fowl, are considered as the principal reservoir of the disease (Hejlicek and Treml, 1995).…”

mentioning

confidence: 99%

“…Galliformes, in particular domestic fowl, are considered as the principal reservoir of the disease (Hejlicek and Treml, 1995). Birds mainly become infected through ingestion of the pathogen, although the respiratory route has not been excluded (Tell et al, 2001). Affected birds are in poor physical condition, emaciated, lethargic and weak.…”

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confidence: 99%

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Examination of Mycobacterium avium subsp. avium distribution in naturally infected hens by culture and triplex quantitative real time PCR

Kaevska¹,

Slaná²,

Králík³

et al. 2010

Vet. Med. - Czech

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Mycobacterium avium subsp. avium (MAA) is the etiologic agent of avian tuberculosis, a chronic contagious disease described in a wide variety of domestic and wild bird species. The aims of this study were to assess the advantages of triplex quantitative real time PCR (qPCR) in comparison with culture testing for distribution of MAA in the organs of hens displaying varying degrees of clinical symptoms of the disease. From one small flock of ten hens and one cock with a history of weight loss, 98 tissue samples were examined in total. Pathological lesions were observed in six hens from which two were clinically ill. A total of 12 samples were positive by culture and 16 were positive by IS901 and IS1245 qPCR, confirming MAA infection. In conclusion, qPCR was a faster and more reliable alternative method in comparison with conventional culture analysis. Due to the detection of MAA in the muscle tissue of one hen, consumption of under cooked meat originating from infected fowl could pose a threat to immunosuppressed individuals.

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Section: Discussionsupporting

confidence: 78%

mentioning

confidence: 98%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Examination of Mycobacterium avium subsp. avium distribution in naturally infected hens by culture and triplex quantitative real time PCR

Kaevska¹,

Slaná²,

Králík³

et al. 2010

Vet. Med. - Czech

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“…Despite this, ATBC can exhibit diversified clinical signs in birds; pathognomic signs are limited and no clinical symptoms specifically identify ATBC in birds (Painter, 1997;Tell et al, 2001), which makes the diagnosis procedure difficult. Hence, the diagnosis of ATBC is most commonly based on serological, haematological and allergy skin tests, and on histopathological, culture and molecular biological techniques.…”

mentioning

confidence: 99%

Diagnostic testing of different stages of avian tuberculosis in naturally infected hens (Gallus domesticus) by the tuberculin skin and rapid agglutination tests, faecal and egg examinations

Shitaye¹,

Mátlová²,

Horvathova³

et al. 2008

Vet. Med. - Czech

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Avian tuberculosis (ATBC) is a significant cause of morbidity and mortality in birds in zoos and breeding establishments. The primary sources of Mycobacterium avium subsp. avium (MAA) of serotypes 1, 2 and 3 are infected animals (esp. birds), who shed MAA in different ways and thus contaminate the environment. The first aim of this work was to compare the efficiency of the diagnostic methods that are routinely used for the diagnosis of ATBC (skin test, serology and culture of faeces and eggs) in naturally infected hens with different levels of infection. The second aim was to determine the excretion rate of MAA in faeces and eggs. The tuberculin skin test gave a positive result in nine (42.9%) infected hens of which four (57.1%) and one (14.3%) were heavily and slightly infected hens, respectively. A positive serological response to MAA-b antigen (water bird isolate of serotype 1) was observed in five (23.8%) and to MAA-p antigen (pig isolate serotype 2) in seven (33.3%) hens. No correlation between serological and skin-test data was found. The results show that both techniques, serological and skin-test data are inadequate for the diagnosis of ATBC. In consecutively euthanized hens, with heavy infection and tuberculous lesions, serological positivity was significant (P < 0.05) in comparison with slightly infected hens lacking tuberculous lesions. Faecal culture detected MAA in 50 (29.8%) of 168 samples collected for eight days before euthanasia. MAA excretion in faeces was intermittent, but significantly (P < 0.01) higher in heavily infected hens. No mycobacteria were detected in any of the 43 examined eggs, which implies that the shedding of MAA and/or transmission of ATBC through eggs may not be frequent events.

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Avian Tuberculosis

Converse¹

2007

Infectious Diseases of Wild Birds

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Mycobacteriosis in birds

Cited by 156 publications

References 71 publications

Examination of Mycobacterium avium subsp. avium distribution in naturally infected hens by culture and triplex quantitative real time PCR

Examination of Mycobacterium avium subsp. avium distribution in naturally infected hens by culture and triplex quantitative real time PCR

Diagnostic testing of different stages of avian tuberculosis in naturally infected hens (Gallus domesticus) by the tuberculin skin and rapid agglutination tests, faecal and egg examinations

Avian Tuberculosis

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