Incidence and Tracking of Clostridium perfringens Through an Integrated Broiler Chicken Operation

10.1637/6010 ◽  
2003 ◽  
Vol 47 (3) ◽  
pp. 707-711 ◽  
Author(s):  
S. E. Craven ◽  
N. A. Cox ◽  
J. S. Bailey ◽  
D. E. Cosby
2019 ◽  
Vol 98 (10) ◽  
pp. 5074-5088 ◽  
Author(s):  
Jaclyn L MacMillan ◽  
Sara D Vicaretti ◽  
Benjamin Noyovitz ◽  
Xiaohui Xing ◽  
Kristin E Low ◽  
...  

2008 ◽  
Vol 46 (12) ◽  
pp. 3957-3964 ◽  
Author(s):  
G. Chalmers ◽  
H. L. Bruce ◽  
D. B. Hunter ◽  
V. R. Parreira ◽  
R. R. Kulkarni ◽  
...  

2021 ◽  
Vol 58 (04) ◽  
pp. 1367-1372
Author(s):  
Zain Ul Abadeen

Necrotic enteritis (NE) is one of the important enteric disease in the poultry industry worldwide, caused by C. perfringens type A. This study describes the isolation, identification, and toxinotyping of C. perfringens in necrotic enteritis affected broiler chicken in Pakistan. A total of 430 intestinal samples from dead carcasses and birds suspected of NE outbreak, in and around Faisalabad, Pakistan were collected from 36 broiler farms which yielded 87 alpha toxin gene (cpa) positive C. perfringens type A isolates. The birds having 4-5 weeks of age, clinical signs, and reared in open (conventional) sheds showed higher C. perfringens isolation rate. The study concluded netB negative C. perfringens type A as a causative agent for NE outbreaks in broiler birds in Faisalabad, Pakistan.


2008 ◽  
Vol 7 (6) ◽  
pp. 601-609 ◽  
Author(s):  
Arunava Das ◽  
Yahya Mazumder ◽  
Biman Kumar Dutta ◽  
Bibek Ranjan Shome ◽  
Komal Molla Bujarbarua ◽  
...  

2006 ◽  
Vol 189 (5) ◽  
pp. 1633-1640 ◽  
Author(s):  
Menglin Ma ◽  
Kaori Ohtani ◽  
Tohru Shimizu ◽  
Naoaki Misawa

ABSTRACTA DNA insertion of 834 bp, designated CPF-G2Im, was identified within the alpha toxin gene (cpa) ofClostridium perfringensstrain CPBC16ML, isolated from a broiler chicken. Sequence analysis of CPF-G2Im indicated that it was integrated 340 nucleotides downstream of the start codon ofcpa. However, the insertion did not abolish the phospholipase C and hemolytic activities of CPBC16ML. To investigate the expression of its alpha toxin, the intact copy ofcpawas cloned into an expression vector and transformed intoEscherichia coliM15 cells. Immunoblotting analysis showed that the protein expressed from the transformant as well as in the culture supernatant ofC. perfringensstrain CPBC16ML had the expected molecular weight detected in reference strains ofC. perfringens. Northern hybridization and reverse transcriptase PCR (RT-PCR) analysis revealed that the entire CPF-G2Im insertion was completely spliced from thecpaprecursor mRNA transcripts. The sequence of the insertion fragment has 95% and 97% identity to two noncoding regions corresponding to sequences that flank a predicted group II RT gene present in the pCPF4969 plasmid ofC. perfringens. However, an RT was not encoded by the CPF-G2Im fragment. Based on the secondary structure prediction analysis, CPF-G2Im revealed typical features of group II introns. The present study shows that CPF-G2Im is capable of splicing in bothC. perfringensandE. coli. To our knowledge, this is the first report that a group II intron without an open reading frame (ORF) is located in thecpaORF ofC. perfringens.


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