An Abattoir based Study on Bovine Tuberculosis in Debre Zeit, Ethiopia

Zenebe, N.; Woldemariam, Tsedale

doi:10.5455/wvj.20170899

Cited by 5 publications

(6 citation statements)

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“…The discrepancy between this study and others may be due to the fact that animals in poor physical condition were not slaughtered during the study period. Although the prevalence of bovine tuberculosis was slightly higher in animals with moderate physical condition (8.87%) than in those with good physical condition (2.08%), this is consistent with findings from other studies that have reported higher immunological response to infection in animals in good physical condition due to the debilitating nature of the disease [ 6 , 40 , 42 ].…”

Section: Discussionsupporting

confidence: 90%

“…This contradicts previous findings of other studies, which showed the retropharyngeal and submaxillary lymph nodes to be more common sites of infection. This suggests that inhalation may be the main route of infection and that postmortem examination should focus on the lungs and associated lymph nodes for comprehensive diagnosis [ 40 , 51 ]. In essence, according to Corner [ 52 ], up to 95% of the cattle with visible TB symptoms could be diagnosed by examining the lungs and related lymph nodes.…”

Section: Discussionmentioning

confidence: 99%

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Isolation and Molecular Identification of Mycobacterium bovis from Slaughtered Cattle in Nekemte Municipality Abattoir, Ethiopia

Mezgebu Gemeda,

Tola,

Donde

et al. 2023

Veterinary Medicine International

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Tuberculosis (TB) is a zoonotic disease that can spread from animals to humans as well as from human to human. Little research has been conducted on bovine tuberculosis prevalence and molecular characterization in the western part of Ethiopia. To investigate this, a cross-sectional study was conducted on slaughtered cattle at the Nekemte municipal abattoir between January 2020 and June 2021. A detailed postmortem examination, culture, acid-fast staining technique, molecular characterization using RD4 deletion, and spoligotyping were all carried out. Based on a detailed postmortem examination, the overall prevalence of bovine tuberculosis was 7.8% (80 of 1020). Mycobacterium isolation confirmed only 12.5% (10/80) of the suspected tuberculosis tissue lesions. With acid-fast bacilli staining, all Mycobacterium spp. isolates (n = 10) were positive. However, only 9/10 isolates were confirmed to be M. bovis with RD4 molecular deletion typing. Spoligotyping revealed that 55.6% (5/9) of the isolate patterns had previously been reported, but 44.4% (4/9) of the isolates were new. In the current investigation, it was discovered that 80% (4/5) of the M. bovis strains circulating in the cattle population of study regions were SB2233 (2/5) and SB0134 (2/5), whereas 20% (1/5) of the strains corresponded to SB1176, which is compatible with previously documented M. bovis spoligotypes. These findings suggested that M. bovis was the main cause of bovine tuberculosis in the study area and posed a risk of disease transmission from cattle to humans due to low levels of public health awareness. As such, improved awareness among citizens and the development of control policies are warranted.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Isolation and Molecular Identification of Mycobacterium bovis from Slaughtered Cattle in Nekemte Municipality Abattoir, Ethiopia

Mezgebu Gemeda,

Tola,

Donde

et al. 2023

Veterinary Medicine International

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“…Unlike butchers, almost all abattoir workers knew about routes of zoonotic infection and knew how to prevent zoonotic TB (Table 4). [33] [34] , [16] , [35] and lower than other abattoir-based studies[36] , [37] , [38]. However, lower prevalence has also been reported elsewhere [39] , [40] and the reported differences might be due to sample size, the origin of the cattle and bTB burden in the study communities.…”

Section: Molecular Characterization Of the Isolatesmentioning

confidence: 70%

Bovine Tuberculosis in Cattle Slaughtered at Abattoir in Ethiopia and Workforce Awareness of Zoonotic Risk

Mohammed,

Girma,

Worku

et al. 2023

Preprint

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Background Bovine tuberculosis (bTB) is endemic and of zoonotic importance in Ethiopia. Despite this, there is limited recent information on the prevalence of bTB in cattle slaughtered at abattoirs. This study reports the prevalence of bTB in cattle slaughtered at the Addis Ababa municipality abattoir and details an assessment of practice and the awareness of occupational workers to zoonoses. Methods A cross-sectional study was conducted at the Addis Ababa municipality abattoir from May 2021 to July 2022. A total of 502 cattle slaughtered at the municipality abattoir (260 in the day shift and 242 in the night shift) were included in the study. Data collection and laboratory investigations included postmortem examination, culture and bacteriological examination, molecular characterization of positive isolates using region of difference (RD4) deletion typing and spoligotyping. Knowledge of zoonotic infection risk and practices were investigated through a questionnaire administered to 58 abattoir workers and 58 butchers. Results Based on postmortem examination, bTB suspected lesion was identified in 4.58% of cattle and it was significantly associated with, age, breed and body condition of the animals. Detection of tuberculosis lesions was higher during the night shift of the slaughter program. The gross lesions were predominately found in the lung and associated lymph nodes (60.87%). Of the 23 bTB suspected tuberculous lesions, 11 (47.83%) tissue samples were culture positive, and four isolates were RD4 positive, identifying M. bovis. Spoligotyping patterns were also effectively detected in four isolates. The observed spoligotype patterns were two SB1477 strains, and SB1176 and SB0133 strains. In the questionnaire survey, 79.31% of abattoir workers were aware of bTB, however, 93.10% of butchers did not know of bTB and understood less about preventing cross-infection. Conclusion Bovine tuberculosis is still evident in cattle reaching the abattoir in Addis Ababa. Higher detection of tuberculous lesions during the night suggests a need for improved meat inspections during the night shift to reduce the public health risk of bTB zoonosis.

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“…Some reports by Jarikre et al (2014); Vial et al (2015); Yibar et al (2015) and Mohammed et al (2018) showed that infections such as tuberculosis and contagious bovine pleuropneumonia, lesions caused by bacteremia, viremia, and toxemia, in addition to abnormal color and consistency, were the major causes of carcass and organ condemnation in some countries. Close monitoring of meat hygiene, including proper implementation of meat inspection procedures during slaughter, should be a vital part of the national public health protection program (Pal et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Major Causes and Associated Economic Losses of Carcass and Organ Condemnation in Cattle and Sheep in the Northern Part of Palestine.

Abuseir¹

2019

jwpr

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Identifying and quantifying the causes of condemnation of carcasses and organs at the slaughterhouse level is the first step in disease surveillance aimed at preventing or decreasing losses at the abattoir. The aim of this study was to evaluate the causes of organ and carcass condemnations and the financial loss due to these condemnations. A slaughterhouse survey was conducted for six months to determine the major causes of carcass and organ condemnation in cattle and sheep and the associated financial loss at the Nablus Municipal Slaughterhouse at the West Bank in Palestine. A total of 6344 sheep, and 3042 cattle were examined during this period. The condemnations were registered during standard postmortem pathological examination done by the veterinarians at the slaughterhouse. The results of organ condemnation during the study period showed that seven whole carcasses, 77 whole offal, 208 livers, 692 lungs, 46 hearts, 273 kidneys, and 96 spleens were condemned during this period. The financial loss due to the rejection of carcass and organs from the slaughtered animals during the study period was estimated to be 16356 USD. Both parasitic infestations and bacterial diseases were responsible for the highest economic losses, although other pathological lesions such as fatty change, incomplete bleeding, discoloration and tumors, were also encountered. The results of this slaughterhouse study showed that the parasitic infestations were the most common cause of condemnations in sheep, and bacterial diseases were the most common cause of condemnations in cattle. There was no doubt that effective disease control programs and preventive measures should be immediately implemented in the Palestinian territories to prevent and decrease the causes of diseases transmitted through meat. The emphasis should be placed on effective meat inspection, proper disposal of organ condemnation and standard animal husbandry health care to exclude zoonotic diseases and associated financial loss.

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An Abattoir based Study on Bovine Tuberculosis in Debre Zeit, Ethiopia

Cited by 5 publications

References 0 publications

Isolation and Molecular Identification of Mycobacterium bovis from Slaughtered Cattle in Nekemte Municipality Abattoir, Ethiopia

Isolation and Molecular Identification of Mycobacterium bovis from Slaughtered Cattle in Nekemte Municipality Abattoir, Ethiopia

Bovine Tuberculosis in Cattle Slaughtered at Abattoir in Ethiopia and Workforce Awareness of Zoonotic Risk

Major Causes and Associated Economic Losses of Carcass and Organ Condemnation in Cattle and Sheep in the Northern Part of Palestine.

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