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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Detection of Genetic Diversity in Campylobacter jejuni Isolated from a Commercial Turkey Flock Using flaA Typing, MLST Analysis and Microarray Assay
PLoS ONE, Volume 8, No. 2, Article e51582, Year 2013
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Description
Campylobacter is genetically highly diverse and undergoes frequent intraspecific recombination. Turkeys have been identified as an important reservoir for Campylobacter jejuni which is of public health significance. The assessment of the genetic diversity among Campylobacter population is critical for our understanding of the epidemiology of this bacterium. The genetic profiles were different according to the molecular typing methods used. The performance of established flaA genotyping, multilocus sequencing typing (MLST) and DNA microarray assay based on the ArrayTube™ technology was evaluated using 14 Campylobacter jejuni isolated from a commercial turkey flock. The flaA typing was performed using PCR-RFLP with restriction enzymes Sau3AI, AluI, a 'composite' flaA analysis of AluI and Sau3AI and DdeI. The 14 isolates were differentiated into 3, 5, 7 and 9 genotypes, respectively. Entire flaA gene and short variable region (SVR) sequences were analysed. Sequencing of the entire flaA provided 11 different genotypes. flaA-SVR sequence analysis detected 8 flaA alleles and 4 flaA peptides. One new flaA allele type (528) was identified. MLST analysis represented 10 different sequence types (STs) and 5 clonal complexes (CCs). The microarray assay recognised 14 different genotypes. The discriminatory indices were 0.560, 0.802, 0.857, and 0.912 for flaA-RFLP depending on the used enzymes, 0.890 for flaA-SVR, 0.967 for entire flaA sequencing, 0.945 for MLST and 1.00 for the DNA microarray assay. The flaA gene was genetically stable over 20 passages on blood agar. In conclusion, the different typing tools demonstrated a high level of genetic heterogeneity of Campylobacter jejuni in a turkey flock, indicating that a single flock can be infected by multiple genotypes within one rearing cycle. DNA microarray-based assays had the highest discriminatory power when compared with other genotyping tools. © 2013 El-Adawy et al.
Authors & Co-Authors
El-Adawy, Hosny
Germany, Tubingen
Friedrich-loeffler-institute
Germany, Berlin
Freie Universität Berlin
Egypt, Kafr El-sheikh
Faculty of Veteinary Medicine
Hotzel, Helmut
Germany, Tubingen
Friedrich-loeffler-institute
Tomaso, Herbert
Germany, Tubingen
Friedrich-loeffler-institute
Neubauer, Heinrich K.J.
Germany, Tubingen
Friedrich-loeffler-institute
Taboada, Eduardo N.
Canada, Ottawa
Public Health Agency of Canada
Ehricht, Ralf
Germany, Jena
Alere Technologies Gmbh
Hafez, Hafez Mohamed
Germany, Berlin
Freie Universität Berlin
Statistics
Citations: 32
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1371/journal.pone.0051582
e-ISSN:
19326203
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study