Comparative Prevallance and Pathological Changes on Camel Brucelosis at the Selected Slaughterhouses in Garissa County, Kenya
Comparative Prevallance and Pathological Changes on Camel Brucelosis at the Selected Slaughterhouses in Garissa County, Kenya
Abdirahman Barre*, Karanja D Njuguna, Bebora Lilly Caroline and George Chege Gitao
ABSTRACT
The study aimed at determining the presence of the disease in camel slaughterhouses in Garissa County, through serological testing and pathological lesions that encountered at post mortem inspection of camel meat. Three sub-counties; Garissa Township, Dadaab and Balambale were purposefully recruited based on presence of camel slaughterhouses and accessibility. A hundred and sixty (160) camels were selected from 238 presented during the visits based on clinical manifestations suggestive of Brucellosis obtained upon ante-mortem examination and clinical history from owners. Sero-prevallance determination that involved the blood collection from the jugular and screening serum for attendance of Brucella antibodies using Rose Bengal Plate Test (RBPT), serum agglutination test, competitive- enzyme linked immune sorbent assay and double agar gel immunodiffusion test. The selected camels were followed into the slaughterhouse and pathological changes were identified grossly and microscopically based on alteration in organ and/tissue structure. The three main clinical signs that suggested brucellosis were lameness, swollen lymph nodes and abortion. Out of 160 samples tested, 15 (9.37%) were positive for Brucella antibodies and evenly distributed between counties; 8% (4/50) for Garissa Township; 10% (5/50) in Dadaab and 10% (6/60) in Balambale. Using chi-square (χ2), there was no statistically alteration in sensitivity among the four serological tests (p=0.999). Seventy-eight (48.7%) camels had one or more organs with lesions leading to condemnation at meat inspection. The common gross lesions encountered were fibrin depositions 3 (1.8%), enlargement of lung 2 (1.2%), pericarditis 38 (23.7%), and hepatomegaly with nodular liver lesions 79 (49.3%), enteritis 5 (3.1%), haemorrhages and congestion of visceral organs (lung and kidney) 6 (3.7%). Histopathology of sero-reactors revealed; cellular infiltration in lymph node 9 (5.6%), hypoplasia of lymphocytes 6 (3.7%), collapse of alveoli 5 (3.1%), oedema, congestion 4 (2.5%), fatty degeneration in liver 3 (1.8%) and haemorrhages in kidney1 (0.6%). In conclusion, brucellosis is prevalent in camel in Garissa County. Further extensive research should be done in the whole country. With respect to picking positive cases, RBPT is recommended as a screening test, since it is cheap, quick, and easy to carry-out. The other three can be used to establish respective antibody titres. The organs condemned at inspections are due to inflammatory processes that can be associated with brucellosis or other zoonotic diseases. Standard biosecurity measures at slaughterhouses and farms be enhanced the control and prevention of Brucella infection to animals and human.
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