THE EFFECT OF ANTIBIOTICS AND ACIDIFIER TREATMENT ON THE COUNT OF LACTOBACILLUS SP., E. COLI AND CLOSTRIDIUM SP. IN THE INTESTINE OF CHICKENS | ||||
Kafrelsheikh Veterinary Medical Journal | ||||
Article 23, Volume 7, Issue 1, May 2009, Page 406-429 PDF (376.19 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/kvmj.2009.108423 | ||||
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Authors | ||||
H.F. Ellakany* 1; E.A Rayhan2; A.M. Awad1; H.S. Abd El-Hamid3 | ||||
1Poultry and Fish Diseases Dept., Fac. Vet. Med., Alexandria University | ||||
2Animal Health Research Institute, Damanhour Branch | ||||
3Fac. Vet. Med., Alexandria University, Damanhour Branch | ||||
Abstract | ||||
The effect of addition of some commonly used antibiotics and acidifier on the total bacterial count of defined intestinal microflora as Lactobacillus sp., E. coli, and Clostridium sp. with special reference to Cl. perfringens was studied. Two antibiotic doses were used: from 14-16th day of age and again from 29th -31st day of age. The second course was followed by an acidifier for 3 days. Results showed that doxycycline and amoxicillin had the most inhibitory effects on Lactobacillus sp. This inhibitory effect was more pronounced if an acidifier was used after these antibiotics than if they were used alone. Cephradin, spiramycin, doxycycline, tylosin, floramphenicol and enrofloxacin showed good inhibitory effects on E. coli. This result concerning E. coli can not be taken as a model of recommendation because the continuous change in the drug resistance of this bacterium. Spiramycin, cephradin, amoxicillin, doxycycline, tylosin, lincospectin and enrofloxacin were effective against Cl. perfringens and other Clostridium sp. The antibacterial action of these antibiotics was increased if an acidifier was used afterwards. One week after the end of the antibiotics and acidifier treatment, there was a decrease in both Lactobacillus sp., E. coli and Clostridium sp. counts in the intestine with one log lower (104) than that count in case of antibiotics without acidifier (105). This finding encourages us to recommend usage of acidifiers for chicken specially after antibiotic courses to prolong their antibacterial activity. | ||||
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Keywords | ||||
ANTIBIOTICS; ACIDIFIER; LACTOBACILLUS SP., E. COLI; CLOSTRIDIUM SP | ||||
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