A Preliminary Survey of Salmonellae in Cattle Slaughtered at Tile Addis Ababa and Dire Dai'ia Abattoirs
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Date
1983-06
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Addis Ababa University
Abstract
In an attempt to assess the incidence of Salmonellae
in apparently healthy cattle slaughtered at the Addis Ababa
and Dire Dawa abattoirs, a total of 1571 organ samples were
collected, out of which 971 were obtained from the former
and 600 from the latter.
The 971 samples from Addis Ababa abattoirs included
315 spleen, 303 mesenteric lymph node and 353 small intestine
samples and these yielded 16 (5.1%), 10 (3.3%) and 8 (2.3:')
strains of Salmonellae, respectively. The remaining 600 samples
collected from cattle slaughtered at the Dire Dawa abattoir
were 200 spleen, 200 mesenteric lymph node and 200 small
intestine samples and from these 14 (7/1,),3(1.5%) and 8 (4%)
strains of Salmonellae \~ere isolated, respec tively. From
this finding the incidence of Salmonellae in the cattle
slaughtered at the Addis Ababa and Dire Dawa abattoirs was
found to be 5.1% and 7% respectively. No significant difference
was observed ( p~ 0.05).
Serogrouping of the 59 Salmonella isolates recovered from
the 1571 samples showed that, \~i th 24 (40.7%) strains, group
D was the most frequent serogroup, to be followed by C1 with
13 (22%) strains, B with 11 (18.6%), C
2
with 6 (10.2')1,) and
E with 5 (8.5%). A comparision of the relative frequency
of the serogroups in the samples from the two abattoirs also revealed that the most frequent sero['.roup Vias D. The
relative incidence of the rest of the serogroups was, however,
found to be variable.
Of the two culture media used viz., Desoxycholate
Citrate Agar and Brilliant Green l>1acConkey Agar, the former
was found to be slightly superior in supporting the growth
of more strains, both in number ffild type, of Salmonellae
encountered in this work
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Biology