STUDIES ON LYMPHOID TISSUE ABSCESSES IN CAMELS (Camelus dromedarius) SLAUGHTERED AT NYALA SLAUGHTERHOUSE, SOUTH DARFOUR STATE, SUDAN.

Abstract

This study was carried out at Nyala slaughterhouse South Darfur State, Sudan
to determine the prevalence of abscesses in lymph nodes and spleen and identify
bacterial species involved in .A total of 786 slaughtered camels were inspected from
2009 to 2011. 92 camels exhibited 103 abscesses with prevalence rate of 12% (more
than one abscesses in some camels).Specimens from these abscesses; 90 in lymph
nodes and 13 in spleens were obtained for bacterial isolation and histopathological
examination.. Growth was observed in 86 of the specimens. A total of 119 bacterial
species was isolated and identified as Corynebacterium spp. (42.9%),
Staphylococcus spp. (20.2%), Arcanobacterium spp. (11.8%), Streptococcus spp.
(5.1%), Pseudomonas aeruginosa (4.2%), Micrococcus luteus (2.5%), Bacillus spp.
(2.5%), Enterobacter spp. (2.5%), Proteus spp. (2.5%), Rhodococcus equi (1.7%),
Citrobacter rodentium (1.7%), Enterococcus durans (0.8%), Escherichia coli
(0.8%), and Actinobacillus lignieresii (0.8%). Small necrotic abscesses were seen in
most histopathological sections of lymph nodes with infiltration of inflammatory
cells. Other sections showed depletion of lymphocytic cells (white pulp), and
hyperplasia and hypotrophy of blood vessels were also seen. Moreover, amass of
thin-walled blood vessels filled with blood and separated by courageous stroma and
surrounded by fibrous tissues. Our findings indicate that abscesses in lymph nodes
were caused by Corynebacterium pseudotuberculosis, Staphylococcus aureus,
Arcanobacterium pyogenes, and Corynebacterium ulcerans, whereas splenic
abscesses were caused by S. aureus, A. pyogenes, C. pseudotuberculosis,
Streptococcus pyogenes and Ps. aeruginosa. Therefore, Corynebacterium ulcerans,
Arcanobacterium pyogenes, Rhodococcus equi and Streptococcus ubaris were first
reporting in The Sudan as camel lymphoid tissue pathogens