Abstract
Samples of internal organs (liver, heart, spleen, kidney and intestinal contents) were aseptically collected from 120 freshly died newly weanling rabbits and subjected to isolation and identification of the causative bacterial pathogens. The causative pathogens were isolated and identified biochemically. E.coli and Salmonella (the major associated pathogens) were typed serologically and tested for antimicrobial agents. The bacterial infection prevalence rate was Escherichia coli (56.6%), Salmonella spp. (27.5%), Enterobacter spp. (7.5%), Citrobacter spp. (5%) and Proteus spp. (3.3%). Out of the 68 infections with E.coli, 30 were serotyped as O125 (ten), O127 (six), O128 (five), O86 (five) and untyped (four). Out of the 33 Salmonella infections, seven were serotyped as serovar S. goldcoast (four) and serovars S. magherafelt (three). E.coli serogroups were resistant to the majority of used antimicrobial and were sensitive only to Sulphamethazole. Both Salmonella serovars were sensitive to most antimicrobial used in this study but they were resistant to amoxicillin. Both infected rabbit groups with E.coli and Salmonella demonstrated obvious histopathological alterations in the intestine, liver and spleen. Both E.coli (O86) and Salmonella goldcoast were used for experimental infection of weanling rabbits (6-8 weeks). Five days post-infection and after observation of the clinical symptoms, animals were sacrificed and tissue samples from the intestine, liver, kidney and spleen were examined histopathologically.Utmost care must be taken around the time of weaning in rabbits.
Highlights
Utmost care must be taken around the time of weaning in rabbits
The current study aims to precisely verify the actual role of E.coli and Salmonella in enteric infections that cause losses in weanling rabbits, detection of other pathogens causing mortalities and detect the most frequent isolates and use drug of choice according to sensitivity test for treatment
Bacteriological examination In this study, the bacteriological examination of internal organs from 120 freshly dead weanling rabbits was carried out and showed that the bacterial infection prevalence rate was Escherichia coli (56.6%), Salmonella spp. (27.5%), Enterobacter spp. (7.5%), Citrobacter spp. (5%) and Proteus spp. (3.3% (Table 1)
Summary
Both Salmonella serovars were sensitive to most antimicrobial used in this study but they were resistant to amoxicillin Both infected rabbit groups with E.coli and Salmonella demonstrated obvious histopathological alterations in the intestine, liver and spleen. Both E.coli (O86) and Salmonella goldcoast were used for experimental infection of weanling rabbits (6-8 weeks). (Newton et al, 2004) reported that E. coli was affect the profitability of a rabbit enterprise, the predominant bacteria isolated from colon and because of its consequence on productive traits, caecum of diarrheic rabbits. Some strains of Clostridium species, Escherichia coli, Staphylococcus aureus, Pseudomonas species, Coccidia and Salmonella species were widely
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