scholarly journals Antimicrobial Susceptibility Profiles and Strain Type Diversity of Campylobacter jejuni Isolates from Turkeys in Eastern North Carolina

2008 ◽  
Vol 75 (2) ◽  
pp. 474-482 ◽  
Author(s):  
Weimin Gu ◽  
Robin M. Siletzky ◽  
Sandra Wright ◽  
Mohammed Islam ◽  
Sophia Kathariou
Keyword(s):  
North Carolina ◽  
Campylobacter Jejuni ◽  
Drug Of Choice ◽  
Ca 50 ◽  
Strain Type ◽  
Eastern North Carolina ◽  
Susceptibility Profiles ◽  
Genomic Cluster ◽  
Sequence Types ◽  
Human Campylobacteriosis

ABSTRACT Campylobacter jejuni is one of the most common bacterial causes of human gastroenteritis, and recent findings suggest that turkeys are an important reservoir for this organism. In this study, 80 C. jejuni isolates from eastern North Carolina were characterized for resistance to nine antimicrobials, and strain types were determined by fla typing, pulsed-field gel electrophoresis (PFGE) with SmaI and KpnI, and (for 41 isolates) multilocus sequence typing (MLST). PFGE analysis suggested that many of the isolates (37/40 [ca. 93%]) in a major genomic cluster had DNA that was partially methylated at SmaI sites. Furthermore, 12/40 (30%) of the isolates in this cluster were completely resistant to digestion by KpnI, suggesting methylation at KpnI sites. MLST of 41 isolates identified 10 sequence types (STs), of which 4 were new. Three STs (ST-1839, ST-2132 and the new ST-2934) were predominant and were detected among isolates from different farms. The majority of the isolates (74%) were resistant to three or more antimicrobials, and resistance to ciprofloxacin was common (64%), whereas resistance to the other drug of choice for treatment of human campylobacteriosis, erythromycin, was never encountered. Most (33/34) of the kanamycin-resistant isolates were also resistant to tetracycline; however, only ca. 50% of the tetracycline-resistant isolates were also kanamycin resistant. Isolates with certain antimicrobial resistance profiles had identical or closely related strain types. Overall, the findings suggest dissemination of certain clonal groups of C. jejuni isolates in the turkey production industry of this region.

Longitudinal Study of Prevalence of Campylobacter jejuni and Campylobacter coli from Turkeys and Swine Grown in Close Proximity

2008 ◽  
Vol 71 (9) ◽  
pp. 1791-1796 ◽  
Author(s):  
S. L. WRIGHT ◽  
D. K. CARVER ◽  
R. M. SILETZKY ◽  
S. ROMINE ◽  
W. E. M. MORROW ◽  
...  
Keyword(s):  
North Carolina ◽  
Campylobacter Jejuni ◽  
The United States ◽  
Campylobacter Coli ◽  
Swine Production ◽  
Close Proximity ◽  
Relative Prevalence ◽  
Eastern North Carolina ◽  
Sampling Times ◽  
Turkey Flock

Eastern North Carolina is a major contributor to both turkey and swine production in the United States. In this region, turkeys and swine are frequently grown in close proximity and by common growers. To further characterize colonization of turkeys and swine with Campylobacter in such a setting, we investigated the prevalence of thermophilic campylobacters in eight paired operations involving turkey farms in close proximity to finishing swine farms. All 15 surveyed flocks and 15 herds were Campylobacter positive at one or more sampling times. Campylobacter was isolated from 1,310 (87%) of the 1,512 turkey samples and 1,116 (77%) of the 1,448 swine samples. Most (>99%) campylobacters from swine samples were Campylobacter coli, found in 59 to 97% of the samples from the different herds. Both Campylobacter jejuni and C. coli were recovered from the turkey flocks (overall prevalences of 52 and 35%, respectively). Prevalence among flocks ranged from 31 to 86% for C. jejuni and 0 to 67% for C. coli, and both species were recovered from most flocks. Relative prevalence of C. coli was higher in young birds (brooders), whereas C. jejuni predominated in grow-out birds (P < 0.0001). The prevalence of C. coli in a swine herd was generally not a good predictor for prevalence of this species in the corresponding turkey flock. These findings indicate that even though turkeys and swine grown in proximity to each other were commonly colonized with thermophilic campylobacters, the relative prevalences of C. jejuni and C. coli appear to be host associated.

scholarly journals Molecular typing and antimicrobial susceptibility profiles of Campylobacter jejuni isolates from north China

2010 ◽  
Vol 59 (10) ◽  
pp. 1171-1177 ◽  
Author(s):  
Maojun Zhang ◽  
Yixin Gu ◽  
Lihua He ◽  
Lu Ran ◽  
Shengli Xia ◽  
...  
Keyword(s):  
Campylobacter Jejuni ◽  
Antimicrobial Susceptibility ◽  
Molecular Typing ◽  
North China ◽  
Clonal Complex ◽  
Resistance Testing ◽  
Genetic Characteristics ◽  
Drug Resistance Testing ◽  
Susceptibility Profiles ◽  
Sequence Types

To obtain the genotype and antimicrobial susceptibility profiles of Campylobacter jejuni isolates from north China, 93 C. jejuni isolates (56 isolates from patients with diarrhoea, 7 isolates from Guillain–Barré syndrome patients and 30 isolates from chicken stools) were selected for multilocus sequence typing (MLST), PFGE and drug resistance testing. A total of 49 sequence types (STs) were identified from the entire panel of 93 C. jejuni isolates. Fifty-six isolates belonged to 14 clonal complexes, while 37 isolates could not be assigned to any known clonal complex. The most frequently observed clonal complexes were ST-21 (11 isolates), ST-353 (10 isolates) and ST-443 (6 isolates). Fifty-three PFGE SmaI patterns were identified among 93 isolates. No erythromycin-, gentamicin- or streptomycin-resistant isolates were found among the 44 strains isolated in 2008. Resistance to nalidixic acid, levofloxacin and ciprofloxacin was observed in 100 % (44/44) of the tested isolates. This study has shown the genetic characteristics of C. jejuni isolates in north China. In addition, overlapping clonal groups were defined by both MLST and PFGE for C. jejuni human and chicken isolates.

scholarly journals Genetic Diversity of Campylobacter jejuni Isolates from Farm Animals and the Farm Environment

2003 ◽  
Vol 69 (12) ◽  
pp. 7409-7413 ◽  
Author(s):  
F. M. Colles ◽  
K. Jones ◽  
R. M. Harding ◽  
M. C. J. Maiden
Keyword(s):  
Genetic Diversity ◽  
Campylobacter Jejuni ◽  
Human Disease ◽  
Clonal Complex ◽  
Food Samples ◽  
Complex Model ◽  
Farm Animals ◽  
Significant Genetic Differentiation ◽  
Sequence Types ◽  
Retail Food

ABSTRACT The genetic diversity of Campylobacter jejuni isolates from farm animals and their environment was investigated by multilocus sequence typing (MLST). A total of 30 genotypes, defined by allelic profiles (assigned to sequence types [STs]), were found in 112 C. jejuni isolates originating in poultry, cattle, sheep, starlings, and slurry. All but two of these genotypes belonged to one of nine C. jejuni clonal complexes previously identified in isolates from human disease and retail food samples and one clonal complex previously associated with an environmental source. There was some evidence for the association of certain clonal complexes with particular farm animals: isolates belonging to the ST-45 complex predominated among poultry isolates but were absent among sheep isolates, while isolates belonging to the ST-61 and ST-42 complexes were predominant among sheep isolates but were absent from the poultry isolates. In contrast, ST-21 complex isolates were distributed among the different isolation sources. Comparison with MLST data from 91 human disease isolates showed small but significant genetic differentiation between the farm and human isolates; however, representatives of six clonal complexes were found in both samples. These data demonstrate that MLST and the clonal complex model can be used to identify and compare the genotypes of C. jejuni isolates from farm animals and the environment with those from retail food and human disease.

Abstract WP345: Stroke Risk Factors Screening and Education: A Regional Strategy to Address Stroke Prevalence and Mortality in Eastern North Carolina

Stroke ◽  
2013 ◽  
Vol 44 (suppl_1) ◽  
Author(s):  
Terry M Congleton ◽  
Cristine W Small ◽  
Susan D Freeman
Keyword(s):  
Risk Factors ◽  
North Carolina ◽  
Stroke Risk ◽  
Stroke Mortality ◽  
Transient Ischemia ◽  
Stroke Risk Factor ◽  
Stroke Risk Factors ◽  
Regional Collaboration ◽  
Stroke Prevalence ◽  
Eastern North Carolina

Background: Eastern North Carolina (ENC) stroke mortality is 12 percent higher than the rest of the state. Often, geographical and sociological barriers prevent people residing in our rural communities from seeking routine health care. Stroke risk factors are known. The purpose of this initiative is to reduce the stroke prevalence and mortality in ENC through community risk factors screening and education. Methods: Medical center volunteers’ staff the screening and volunteer hours are recorded in a community benefit database. Each participant completes a standardized evidenced based assessment. Information collected at each screening includes demographic data, cardiovascular history, knowledge of stroke/transient ischemia signs and symptoms. Clinical metrics obtained are finger stick for random lipid panel and blood glucose, body mass index, hip to waist ratio and carotid bruit screen. Based on the screening results, education, recommendations and referrals are reviewed with every participant. Results: From 2007-2010 the screening volume doubled. In 2011, there was a reduction in screening volume as our system hospitals expanded their community stroke outreach efforts. Approximately 4900 community screenings have been conducted from 2007-2011. Elevated blood pressure and cholesterol respectively are most frequently occurring stroke risks factor found, which is consistent with national trends. Stroke mortality has decreased in the region while transient ischemia attack admissions volume has increased at our certified primary stroke center and regional referral center. Conclusions: In conclusion, primary and secondary prevention through community outreach education, risk factors screening and regional collaboration has made a difference. The region has seen a decrease in stroke prevalence and mortality in ENC. Further reduction is necessary to continue to make an even greater impact. Future directions for the stroke risk factor identification screening is to further integrate community efforts and seeks grant opportunities to establish stroke prevention and management clinics throughout the region.

scholarly journals Campylobacteriosis in returning travellers and potential secondary transmission of exotic strains

2013 ◽  
Vol 142 (6) ◽  
pp. 1277-1288 ◽  
Author(s):  
L. MUGHINI-GRAS ◽  
J. H. SMID ◽  
J. A. WAGENAAR ◽  
A. DE BOER ◽  
A. H. HAVELAAR ◽  
...  
Keyword(s):  
Risk Factors ◽  
Campylobacter Jejuni ◽  
Western Europe ◽  
Southern Europe ◽  
Factors Associated ◽  
Chronic Enteropathies ◽  
Returning Travellers ◽  
The Caribbean ◽  
Sequence Types ◽  
Undercooked Pork

SUMMARYMultilocus sequence types (STs) were determined for 232 and 737Campylobacter jejuni/coliisolates from Dutch travellers and domestically acquired cases, respectively. Putative risk factors for travel-related campylobacteriosis, and for domestically acquired campylobacteriosis caused by exotic STs (putatively carried by returning travellers), were investigated. Travelling to Asia, Africa, Latin America and the Caribbean, and Southern Europe significantly increased the risk of acquiring campylobacteriosis compared to travelling within Western Europe. Besides eating chicken, using antacids, and having chronic enteropathies, we identified eating vegetable salad outside Europe, drinking bottled water in high-risk destinations, and handling/eating undercooked pork as possible risk factors for travel-related campylobacteriosis. Factors associated with domestically acquired campylobacteriosis caused by exotic STs involved predominantly person-to-person contacts around popular holiday periods. We concluded that putative determinants of travel-related campylobacteriosis differ from those of domestically acquired infections and that returning travellers may carry several exotic strains that might subsequently spread to domestic populations even through limited person-to-person transmission.

scholarly journals Population Genetics and Characterization ofCampylobacter jejuniIsolates from Western Jackdaws and Game Birds in Finland

2018 ◽  
Vol 85 (4) ◽  
Author(s):  
Sara Kovanen ◽  
Mirko Rossi ◽  
Mari Pohja-Mykrä ◽  
Timo Nieminen ◽  
Mirja Raunio-Saarnisto ◽  
...  
Keyword(s):  
Host Specificity ◽  
Campylobacter Jejuni ◽  
Multilocus Sequence Typing ◽  
Wild Birds ◽  
Whole Genome ◽  
Mallard Duck ◽  
Content Type ◽  
Game Birds ◽  
Hygienic Measures ◽  
Sequence Types

ABSTRACTPoultry are considered a major reservoir and source of human campylobacteriosis, but the roles of environmental reservoirs, including wild birds, have not been assessed in depth. In this study, we isolated and characterizedCampylobacter jejunifrom western jackdaws (n= 91, 43%), mallard ducks (n= 82, 76%), and pheasants (n= 9, 9%). Most of the western jackdaw and mallard duckC. jejuniisolates represented multilocus sequence typing (MLST) sequence types (STs) that diverged from those previously isolated from human patients and various animal species, whereas all pheasant isolates represented ST-19, a common ST among human patients and other hosts worldwide. Whole-genome MLST revealed that mallard duck ST-2314 and pheasant ST-19 isolates represented bacterial clones that were genetically highly similar to human isolates detected previously. Further analyses revealed that in addition to a divergent ClonalFrame genealogy, certain genomic characteristics of the western jackdawC. jejuniisolates, e.g., a novelcdtABCgene cluster and the type VI secretion system (T6SS), may affect their host specificity and virulence. Game birds may thus pose a risk for acquiring campylobacteriosis; therefore, hygienic measures during slaughter and meat handling warrant special attention.IMPORTANCEThe roles of environmental reservoirs, including wild birds, in the molecular epidemiology ofCampylobacter jejunihave not been assessed in depth. Our results showed that game birds may pose a risk for acquiring campylobacteriosis, because they hadC. jejunigenomotypes highly similar to human isolates detected previously. Therefore, hygienic measures during slaughter and meat handling warrant special attention. On the contrary, a unique phylogeny was revealed for the western jackdaw isolates, and certain genomic characteristics identified among these isolates are hypothesized to affect their host specificity and virulence. Comparative genomics within sequence types (STs), using whole-genome multilocus sequence typing (wgMLST), and phylogenomics are efficient methods to analyze the genomic relationships ofC. jejuniisolates.

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