scholarly journals Distribution of tet(H) among Pasteurella isolates from the United States and Canada.

1996 ◽  
Vol 40 (6) ◽  
pp. 1558-1560 ◽  
Author(s):  
L M Hansen ◽  
P C Blanchard ◽  
D C Hirsh
Keyword(s):  
United States ◽  
Transposable Element ◽  
Plasmid Dna ◽  
Pasteurella Multocida ◽  
The United States ◽  
Pasteurella Haemolytica ◽  
Chromosomal Dna ◽  
H Gene

Tetracycline-resistant isolates of Pasteurella multocida and Pasteurella haemolytica obtained from various locations in the United States and Canada were studied to determine the distribution of the tet(H) gene. Of the 31 isolates examined, 25 were found to contain the tet(H) gene. Chromosomal or plasmid DNA obtained from those that did not contain the tet(H) gene did not hybridize with probes specific for classes A through G, though chromosomal DNA from one isolate lacking tet(H) hybridized with a probe specific for class M. The tet(H) gene was found on plasmid as well as on chromosomal DNA, suggesting that it is carried on a transposable element.

Pulsed-field gel electrophoresis applied for comparing Listeria monocytogenes strains involved in outbreaks

1993 ◽  
Vol 39 (4) ◽  
pp. 395-401 ◽  
Author(s):  
C. Buchrieser ◽  
R. Brosch ◽  
B. Catimel ◽  
J. Rocourt
Keyword(s):  
United States ◽  
Listeria Monocytogenes ◽  
Gel Electrophoresis ◽  
The United States ◽  
Pulsed Field Gel Electrophoresis ◽  
Chromosomal Dna ◽  
Restriction Patterns ◽  
Pulsed Field ◽  
Dna Restriction Fragments ◽  
Dna Restriction

Recent food-borne outbreaks of human listeriosis as well as numerous sporadic cases have been mainly caused by Listeria monocytogenes serovar 4b strains. Thus, it was of interest to find out whether a certain clone or a certain few clones were responsible for these cases and especially for outbreaks., We used pulsed-field gel electrophoresis of large chromosomal DNA restriction fragments generated by ApaI, SmaI, or NotI to analyse 75 L. monocytogenes strains isolated during six major and eight smaller recent listeriosis outbreaks. These strains could be divided into 20 different genomic varieties. Thirteen of 14 strains isolated during major epidemics in Switzerland (1983–1987), the United States (California, 1985) and Denmark (1985–1987) demonstrated indistinguishable DNA restriction patterns. In contrast, strains responsible for the outbreaks in Canada (Nova Scotia, 1981), the United States (Massachusetts, 1983), France (Anjou, 1975–1976), New Zealand (1969), and Austria (1986) and some smaller outbreaks in France (1987, 1988, 1989) were each characterized by particular combinations of DNA restriction patterns. Seventy-seven percent of the tested strains could be classified into the previously described ApaI group A (Brosch et al. 1991), demonstrating a very close genomic relatedness. Because 49% of the epidemic strains selected for this study belonged to phagovar 2389/2425/3274/2671/47/108/340 or 2389/47/108/340, fifty-six additional strains of these phagovars, isolated from various origins, were also typed to determine whether differences in DNA restriction profiles between epidemic and randomly selected strains of the same phagovars could be pointed out. Variations in DNA patterns appeared more frequently within randomly selected strains than within epidemic strains.Key words: Listeria monocytogenes, listeriosis, typing, pulsed-field gel electrophoresis, epidemic.

scholarly journals Molecular Epidemiology of KPC-Producing Klebsiella pneumoniae Isolates in the United States: Clonal Expansion of Multilocus Sequence Type 258

2009 ◽  
Vol 53 (8) ◽  
pp. 3365-3370 ◽  
Author(s):  
Brandon Kitchel ◽  
J. Kamile Rasheed ◽  
Jean B. Patel ◽  
Arjun Srinivasan ◽  
Shiri Navon-Venezia ◽  
...  
Keyword(s):  
United States ◽  
Klebsiella Pneumoniae ◽  
Molecular Epidemiology ◽  
Plasmid Dna ◽  
Restriction Analysis ◽  
Clonal Expansion ◽  
The United States ◽  
Pulsed Field Gel Electrophoresis ◽  
Sequence Type ◽  
Control And Prevention

ABSTRACT Klebsiella pneumoniae carbapenemase (KPC)-producing Enterobacteriaceae have become more common in the United States and throughout the world. We used pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) to examine the molecular epidemiology of KPC-producing K. pneumoniae isolates sent to the Centers for Disease Control and Prevention (CDC) for reference testing from 1996 to 2008. A dominant strain, sequence type 258 (ST 258), was found and likely accounts for 70% of the CDC's K. pneumoniae PFGE database. Isolates with PFGE patterns related to ST 258 were identified in 10 of the 19 U.S. states currently reporting KPC-producing K. pneumoniae, in addition to one isolate from Israel. KPC subtyping and analysis of the surrounding genetic environment were subsequently performed on 23 representative isolates. Thirteen isolates identified as ST 258 possessed either bla KPC-2 or bla KPC-3 and some variability in the Tn4401 element upstream of the bla KPC gene. Escherichia coli DH10B was successfully transformed by electroporation with KPC-encoding plasmid DNA from 20 of the 23 isolates. Restriction analysis of plasmid DNA prepared from transformants revealed a diversity of band patterns, suggesting the presence of different plasmids harboring the bla KPC gene, even among isolates of the same ST.

scholarly journals Draft Genome Sequence of Pasteurella multocida Isolate P1062, Isolated from Bovine Respiratory Disease

2015 ◽  
Vol 3 (5) ◽  
Author(s):  
Juan E. Abrahante ◽  
Samuel S. Hunter ◽  
Samuel K. Maheswaran ◽  
Melissa J. Hauglund ◽  
Fred M. Tatum ◽  
...  
Keyword(s):  
United States ◽  
Respiratory Disease ◽  
Genome Sequence ◽  
Pasteurella Multocida ◽  
Bovine Respiratory Disease ◽  
Draft Genome ◽  
The United States ◽  
Draft Genome Sequence

Here, we report the draft genome of Pasteurella multocida isolate P1062 recovered from pneumonic bovine lung in the United States in 1959.

Plasmid Diversity in Salmonella enteritidis of Animal, Poultry, and Human Origin

1994 ◽  
Vol 57 (1) ◽  
pp. 4-11 ◽  
Author(s):  
LOIS A. BICHLER ◽  
KAKAMBI V. NAGARAJA ◽  
BENJAMIN S. POMEROY
Keyword(s):  
United States ◽  
Disease Control ◽  
Plasmid Dna ◽  
Salmonella Enteritidis ◽  
Extraction Procedure ◽  
The United States ◽  
Plasmid Profile ◽  
Veterinary Services ◽  
Centers For Disease Control ◽  
Animal Isolates

One hundred thirty-eight isolates of Salmonella enteritidis from human, animal, and avian species were analyzed for the presence of plasmid DNA. Plasmid DNA from S. enteritidis isolates were extracted by a modification of a high alkaline extraction procedure. Comparisons were made between samples based on the number of plasmids present and their molecular weights. There were seven different profiles seen among the 15 human isolates from the Centers for Disease Control. These seven profiles were recognized with the animal isolates from the National Veterinary Services Laboratory, the chicken isolates from the northeastem (NE) region of the United States, and the turkey isolates from Minnesota (MN). There were no shared profdes between the human isolates and the chicken isolates from MN. The greatest relationship existed between the human isolates and the chicken isolates from the NE region of the United States, sharing four common profiles. Every Centers for Disease Control isolate shared a plasmid profile with chicken isolates from the NE region of the United States. The chicken isolates from MN had no profiles in common with any isolates from any other groups. The majority of animal isolates from National Veterinary Services Laboratory and the turkey isolates from MN possessed the virulence-associated 54 kb plasmid alone. This paper describes how plasmid profiles can be used as a tool in epidemiological investigations.

scholarly journals Assessment of FTA card employment for Pasteurella multocida DNA transport and detection of virulence-associated genes in strains isolated from fowl cholera in the United States

2018 ◽  
Vol 70 (6) ◽  
pp. 1855-1861 ◽  
Author(s):  
C.N. Almeida ◽  
T.Q. Furian ◽  
K.A. Borges ◽  
G. Perdoncini ◽  
M.J. Mauel ◽  
...  
Keyword(s):  
United States ◽  
Pasteurella Multocida ◽  
Virulence Genes ◽  
Genetic Material ◽  
Storage Period ◽  
The United States ◽  
Material Transport ◽  
Dna Transport ◽  
Fowl Cholera ◽  
Fta Cards

ABSTRACT Fowl Cholera (FC) is a disease caused by Pasteurella multocida. The severity of this disease is partly caused by virulence factors. Genes encoding fimbriae, capsule, sialidases and proteins for iron metabolism may be related to P. multocida’s ability to infect the host. Besides to examining DNA for the presence of virulence genes, DNA is essential for the diagnostic and FTA cards are an alternative for genetic material transport. The study aims to evaluate the viability of P. multocida DNA transport using the cards and to detect 14 virulence genes in 27 strains isolated from FC cases in the United States by multiplex-PCR. No growth was observed in any of the FTA cards, which was essential to assess the security. Furthermore, DNA detection was possible in 100% of the samples, independent of the storage period (7 to 35 days) and temperature (4°C and 37°C). ptfA, exbd-tonB, hgbA, nanB, oma87, hyaD-hyaC, sodC, hgbB, sodA, nanH and pfhA genes were detected in more than 80% of the samples. FTA cards have proven to be a viable and safe tool for DNA transport of P. multocida. A majority of genes showed a high frequency, which was similar to strains isolated from FC cases.

scholarly journals Streptococcus agalactiae Strains with Chromosomal Deletions Evade Detection with Molecular Methods

2019 ◽  
Vol 57 (4) ◽  
Author(s):  
Isabella A. Tickler ◽  
Fred C. Tenover ◽  
Scott Dewell ◽  
Victoria M. Le ◽  
Rachel N. Blackman ◽  
...  
Keyword(s):  
United States ◽  
Streptococcus Agalactiae ◽  
The United States ◽  
Molecular Diagnostic ◽  
Chromosomal Dna ◽  
Convenience Sample ◽  
Geographic Locations ◽  
Content Type ◽  
Chromosomal Deletions ◽  
Group B

ABSTRACT Surveillance of circulating microbial populations is critical for monitoring the performance of a molecular diagnostic test. In this study, we characterized 31 isolates of Streptococcus agalactiae (group B Streptococcus [GBS]) from several geographic locations in the United States and Ireland that contain deletions in or adjacent to the region of the chromosome that encodes the hemolysin gene cfb, the region targeted by the Xpert GBS and GBS LB assays. PCR-negative, culture-positive isolates were recognized during verification studies of the Xpert GBS assay in 12 laboratories between 2012 and 2018. Whole-genome sequencing of 15 GBS isolates from 11 laboratories revealed four unique deletions of chromosomal DNA ranging from 181 bp to 49 kb. Prospective surveillance studies demonstrated that the prevalence of GBS isolates containing deletions in the convenience sample was <1% in three geographic locations but 7% in a fourth location. Among the 15 isolates with chromosomal deletions, multiple pulsed-field gel electrophoresis types were identified, one of which appears to be broadly dispersed across the United States.

scholarly journals Emerging Plasmid-Mediated Quinolone Resistance Associated with the qnr Gene in Klebsiella pneumoniae Clinical Isolates in the United States

2004 ◽  
Vol 48 (4) ◽  
pp. 1295-1299 ◽  
Author(s):  
Minggui Wang ◽  
Daniel F. Sahm ◽  
George A. Jacoby ◽  
David C. Hooper
Keyword(s):  
United States ◽  
Escherichia Coli ◽  
Klebsiella Pneumoniae ◽  
Plasmid Dna ◽  
Southern Hybridization ◽  
The United States ◽  
Quinolone Resistance ◽  
Clinical Isolates ◽  
E Coli ◽  
Agarose Gels

ABSTRACT Although quinolone resistance commonly results from chromosomal mutation, recent studies indicate that such resistance can also be transferred on plasmids carrying the gene responsible, qnr. One hundred ten ciprofloxacin-resistant clinical isolates of Klebsiella pneumoniae and Escherichia coli from the United States were screened for the qnr gene by PCR and Southern hybridization of plasmid DNA. Conjugation experiments were done with azide-resistant E. coli J53 as the recipient and selection with azide and sulfonamide, a resistance frequently linked to qnr. EcoRI and BamHI digests of qnr-hybridizing plasmids were subjected to electrophoresis on agarose gels and probed with qnr by Southern hybridization. qnr was detected in 8 (11.1%) of 72 K. pneumoniae strains. These eight positive strains were from six states in the United States. qnr was not found in any of the 38 E. coli strains tested. Quinolone resistance was transferred from seven of the eight probe-positive strains. Transconjugants with qnr-hybridizing plasmids had 32-fold increases in ciprofloxacin MICs relative to E. coli J53. For all eight strains, the sequence of qnr was identical to that originally reported. By size and restriction digests, four plasmids were related to the first-reported plasmid, pMG252, and three were different. Five new qnr plasmids encoded FOX-5 β-lactamase, as did pMG252, but two others produced SHV-7 extended-spectrum β-lactamase. Transferable plasmid-mediated quinolone resistance associated with qnr is now widely distributed in quinolone-resistant clinical strains of K. pneumoniae in the United States. Plasmid-determined quinolone resistance contributes to the increasing quinolone resistance of K. pneumoniae isolates and to the linkage previously observed between resistance to quinolones and the latest β-lactam antibiotics.

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