Quantitative expression of cholera toxin mRNA in Vibrio cholerae isolates with different CTX cassette arrangements.

Abstract:

:Cholera toxin (CT) is the major virulence factor produced by Vibrio cholerae. Several genomic arrangements within the CTX cassette have been elucidated in V. cholerae. Previously, it was shown that three different CTX cassette arrangements, one complete CTX cassette (arrangement A), one complete and two incomplete CTX cassettes (arrangement B), and two complete CTX cassettes (arrangement C), exist within V. cholerae isolates. In the present study, the level of CT expression by V. cholerae isolates carrying different CTX cassette arrangements was evaluated. Real-time quantitative PCR analysis showed unequal production of CT mRNA in V. cholerae isolates with different CTX arrangements. V. cholerae with the CTX arrangement C expressed more CT mRNA than isolates with the other CTX arrangements. In addition, CT mRNA was expressed more in the isolates with CTX arrangement B than in those with arrangement A. Overall, these results suggest that the arrangement and number of regulatory elements (rstA) within the CTX cassette could affect the level of expression of CT.

journal_name

J Med Microbiol

authors

Amin Marashi SM,Bakhshi B,Imani Fooladi AA,Tavakoli A,Sharifnia A,Pourshafie MR

doi

10.1099/jmm.0.038752-0

subject

Has Abstract

pub_date

2012-08-01 00:00:00

pages

1071-1073

issue

Pt 8

eissn

0022-2615

issn

1473-5644

journal_volume

61

pub_type

杂志文章
  • In vitro detection of bacterial contamination in platelet concentrates by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry: a preliminary study.

    abstract:PURPOSE:Platelet concentrates are at risk of transfusion-related sepsis. The microbial detection methods currently available have reached their limits, as they do not completely prevent transfusion-related bacterial contamination.The aim of this study was to develop a new strategy to detect the risk of platelet transfu...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.000533

    authors: Chetouane Y,Dubourg G,Gallian P,Delerce J,Levasseur A,Flaudrops C,Chabrière E,Chiaroni J,Raoult D,Camoin-Jau L

    更新日期:2017-11-01 00:00:00

  • In vitro activity of azithromycin, newer quinolones and cephalosporins in ciprofloxacin-resistant Salmonella causing enteric fever.

    abstract::The therapeutic alternatives available for use against ciprofloxacin-resistant enteric fever isolates in an endemic area are limited. The antibiotics currently available are the quinolones, third-generation cephalosporins and conventional first-line drugs. In this study, the MICs of various newer drugs were determined...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.47353-0

    authors: Capoor MR,Rawat D,Nair D,Hasan AS,Deb M,Aggarwal P,Pillai P

    更新日期:2007-11-01 00:00:00

  • Analysis of quorum sensing-deficient clinical isolates of Pseudomonas aeruginosa.

    abstract::Pseudomonas aeruginosa produces multiple virulence factors and causes different types of infections. Previous clinical studies identified P. aeruginosa isolates that lack individual virulence factors. However, the impact of losing several virulence factors simultaneously on the in vivo virulence of P. aeruginosa is no...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.45617-0

    authors: Schaber JA,Carty NL,McDonald NA,Graham ED,Cheluvappa R,Griswold JA,Hamood AN

    更新日期:2004-09-01 00:00:00

  • Persistence of RSV promotes proliferation and epithelial-mesenchymal transition of bronchial epithelial cells through Nodal signaling.

    abstract:PURPOSE:Nodal may play an important role in the development of cancers. The present study was designed to determine the effects of Nodal induced by respiratory syncytial virus (RSV) infection on the occurrence and development of lung cancer and the underlying mechanisms. METHODOLOGY:After verification of RSV infection...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.000581

    authors: Xiang Z,Liang Z,Yanfeng H,Leitao K

    更新日期:2017-10-01 00:00:00

  • Balamuthia mandrillaris resistance to hostile conditions.

    abstract::The resistance of Balamuthia mandrillaris to physical, chemical and radiological conditions was tested. Following treatments, viability was determined by culturing amoebae on human brain microvascular endothelial cells for up to 12 days. B. mandrillaris cysts were resistant to repeated freeze-thawing (five times), tem...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.47694-0

    authors: Siddiqui R,Ortega-Rivas A,Khan NA

    更新日期:2008-04-01 00:00:00

  • Denaturing gradient gel electrophoresis analysis for the detection of point mutations in the Chlamydia trachomatis major outer-membrane protein gene.

    abstract::Fifty clinical strains of Chlamydia trachomatis were studied by denaturing gradient gel electrophoresis (DGGE) of bacterial DNA amplified by the polymerase chain reaction (PCR). The strains belonged to the three most commonly encountered serovars in developed countries--D, E and F. Six reference strains, including the...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-43-1-14

    authors: Sayada C,Denamur E,Grandchamp B,Orfila J,Elion J

    更新日期:1995-07-01 00:00:00

  • Multi-drug resistant Vibrio cholerae O1 variant El Tor isolated in northern Vietnam between 2007 and 2010.

    abstract::Since 2007, there has been a re-emergence of cholera outbreaks in northern Vietnam. To understand the molecular epidemiological relatedness and determine the antibiotic susceptibility profiles of responsible V. cholerae O1 outbreak strains, a representative collection of 100 V. cholerae O1 strains was characterized. V...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.034744-0

    authors: Tran HD,Alam M,Trung NV,Van Kinh N,Nguyen HH,Pham VC,Ansaruzzaman M,Rashed SM,Bhuiyan NA,Dao TT,Endtz HP,Wertheim HFL

    更新日期:2012-03-01 00:00:00

  • Induction of proinflammatory cytokines in human lung epithelial cells during Rhodococcus equi infection.

    abstract::Rhodococcus equi is an opportunistic human pathogen associated with immunosuppressed people. While the interaction of R. equi with macrophages has been comprehensively studied, little is known about its interactions with non-phagocytic cells. Here, we characterized the entry process of this bacterium into human lung e...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.056234-0

    authors: Remuzgo-Martínez S,Pilares-Ortega L,Álvarez-Rodríguez L,Aranzamendi-Zaldunbide M,Padilla D,Icardo JM,Ramos-Vivas J

    更新日期:2013-08-01 00:00:00

  • Restoring the activity of the antibiotic aztreonam using the polyphenol epigallocatechin gallate (EGCG) against multidrug-resistant clinical isolates of Pseudomonas aeruginosa.

    abstract::Introduction. Pseudomonas aeruginosa is an important Gram-negative pathogen that is intrinsically multidrug-resistant (MDR) and frequently associated with healthcare-associated outbreaks. With increasing resistance to antibiotics and with very few novel drugs under development, clinicians often use combinations to tre...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.001060

    authors: Betts JW,Hornsey M,Higgins PG,Lucassen K,Wille J,Salguero FJ,Seifert H,La Ragione RM

    更新日期:2019-10-01 00:00:00

  • Detection and identification of bacteria in clinical samples by 16S rRNA gene sequencing: comparison of two different approaches in clinical practice.

    abstract::Amplification and sequence analysis of the 16S rRNA gene can be applied to detect and identify bacteria in clinical samples. We examined 75 clinical samples (17 culture-positive, 58 culture-negative) prospectively by two different PCR protocols, amplifying either a single fragment (1343 bp) or two fragments (762/598 b...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.030387-0

    authors: Jenkins C,Ling CL,Ciesielczuk HL,Lockwood J,Hopkins S,McHugh TD,Gillespie SH,Kibbler CC

    更新日期:2012-04-01 00:00:00

  • Bacterial adhesion and biofilm formation on yttria-stabilized, tetragonal zirconia and titanium oral implant materials with low surface roughness - an in situ study.

    abstract::Bacterially-driven mucosal inflammation and the development of periimplantitis can lead to oral implant failure. In this study, initial bacterial adhesion after 2 h, and biofilm formation after 1 day and 3 days, were analysed in situ on novel 3 mol % yttria-stabilized tetragonal zirconia polycrystal samples, as well a...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.000267

    authors: Al-Ahmad A,Karygianni L,Schulze Wartenhorst M,Bächle M,Hellwig E,Follo M,Vach K,Han JS

    更新日期:2016-07-01 00:00:00

  • Comparative performance of the Roche COBAS Amplicor assay and an in-house real-time PCR assay for diagnosis of Chlamydia trachomatis infection.

    abstract::This study investigated the comparative performance of the Amplicor assay and an in-house semi-automated, multiplex real-time PCR for the diagnosis of genital chlamydial infection. Four different assays, the COBAS Amplicor CT test (Amplicor PCR), in-house real-time PCR (IHRT-PCR), in-house nested cryptic plasmid PCR a...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.46762-0

    authors: Jalal H,Al-Suwaine A,Stephen H,Carne C,Sonnex C

    更新日期:2007-03-01 00:00:00

  • Molecular characterisation of the dominant UK methicillin-resistant Staphylococcus aureus strains, EMRSA-15 and EMRSA-16.

    abstract::Epidemic methicillin-resistant Staphylococcus aureus types 15 and 16 (EMRSA-15 and EMRSA-16) are the dominant types of MRSA found in UK hospitals, but accurate designation of strains has been difficult. Restriction fragment length polymorphism (RFLP) profiles of seven core virulence genes were used to classify unambig...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/0022-1317-51-6-516

    authors: Moore PCL,Lindsay JA

    更新日期:2002-06-01 00:00:00

  • The resolution of bacteroides lipopolysaccharides by polyacrylamide gel electrophoresis.

    abstract::The lipopolysaccharides (LPS) of the 10 species of the genus Bacteroides (sensu stricto) were extracted by the proteinase K method and their resolution compared by several methods of polyacrylamide gel electrophoresis (PAGE). These included sodium dodecyl sulphate (SDS)-PAGE with and without urea, polyacrylamide gradi...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-34-5-253

    authors: Maskell JP

    更新日期:1991-05-01 00:00:00

  • PCR detection of toxic shock syndrome toxin of Staphylococcus aureus from Tripoli, Libya.

    abstract::Sixty-three Staphylococcus aureus strains (40 from clinical sources and 23 from food sources) were examined for toxic shock syndrome toxin-1 (TSST-1) using PCR, phage typed using the international phage set (IPS) and tested for their susceptibility to antibiotics. Only three strains (all from clinical sources) were po...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.46162-0

    authors: El-Ghodban A,Ghenghesh KS,Márialigeti K,Esahli H,Tawil A

    更新日期:2006-02-01 00:00:00

  • Age-specific prevalence of diffusely adherent Escherichia coli in Brazilian children with acute diarrhoea.

    abstract::In a prospective study between February 2003 and June 2004, stool specimens of children less than 2 years of age with diarrhoea (n=218) and without diarrhoea (n=86), living in Vitória, Espírito Santo, Brazil, were examined for the presence of diarrhoeagenic Escherichia coli. E. coli isolates were tested by colony blot...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.47660-0

    authors: Spano LC,Sadovsky ADI,Segui PN,Saick KW,Kitagawa SMS,Pereira FEL,Fagundes-Neto U,Scaletsky ICA

    更新日期:2008-03-01 00:00:00

  • Bacterial growth and toxin production in ileostomy effluents.

    abstract::Escherichia coli (2), Vibrio cholerae (2) and Aeromonas sobria (1) strains were examined for their ability to grow and produce toxins in samples of ileostomy fluid. Three categories of response were observed: no detectable growth, growth without detectable toxin, and growth with detectable toxin. Clear differences wer...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-28-4-287

    authors: Ala Aldeen DA,Barer MR

    更新日期:1989-04-01 00:00:00

  • Influence of bacteria from the duodenal microbiota of patients with symptomatic giardiasis on the pathogenicity of Giardia duodenalis in gnotoxenic mice.

    abstract::Recent studies have shown that the intestinal microbiota is essential for the pathogenicity but not for the multiplication of Giardia duodenalis in the intestinal lumen. The microbial components responsible for this phenomenon are not known. Twenty-eight facultative and three strictly anaerobic micro-organisms were is...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/0022-1317-49-3-209

    authors: Torres MF,Uetanabaro APT,Costa AF,Alves CA,Farias LM,Bambirra EA,Penna FJ,Vieira EC,Nicoli JR

    更新日期:2000-03-01 00:00:00

  • Structural analysis of a p44/msp2 expression site of Anaplasma phagocytophilum in naturally infected ticks in Japan.

    abstract::Anaplasma phagocytophilum, an agent of human granulocytic anaplasmosis, infects neutrophils and causes an emerging tickborne febrile disease. The genome of this bacterium contains a large number of p44/msp2-related genes encoding 44 kDa major outer-membrane proteins, and it is known that a specific p44/msp2 gene is pr...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.011775-0

    authors: Wuritu,Ozawa Y,Gaowa,Kawamori F,Masuda T,Masuzawa T,Fujita H,Ohashi N

    更新日期:2009-12-01 00:00:00

  • High frequency of cultivable human subgroup F adenoviruses in stool samples from a paediatric population admitted to hospital with acute gastroenteritis.

    abstract::The family Adenoviridae consists of five genera of which the genus Mastadenovirus includes human viruses classified into 57 serotypes clustered into seven subgroups (A-G). Serotypes 40 and 41 (subgroup F) are specifically associated with childhood gastroenteritis and are the most common cause of acute gastroenteritis ...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.072413-0

    authors: Arcangeletti MC,Germini D,Martorana D,Rodighiero I,De Conto F,Medici MC,Chezzi C,Calderaro A

    更新日期:2014-06-01 00:00:00

  • The effects of iclaprim on exotoxin production in methicillin-resistant and vancomycin-intermediate Staphylococcus aureus.

    abstract:PURPOSE:Extracellular protein toxins contribute to the pathogenesis of Staphylococcus aureus infections. The present study compared the effects of iclaprim and trimethoprim - two folic acid synthesis inhibitors - with nafcillin and vancomycin on production of Panton-Valentine leukocidin (PVL), alpha haemolysin (AH) and...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.000929

    authors: Bryant AE,Gomi S,Katahira E,Huang DB,Stevens DL

    更新日期:2019-03-01 00:00:00

  • Wild birds as biological indicators of environmental pollution: antimicrobial resistance patterns of Escherichia coli and enterococci isolated from common buzzards (Buteo buteo).

    abstract::A total of 36 Escherichia coli and 31 enterococci isolates were recovered from 42 common buzzard faecal samples. The E. coli isolates showed high levels of resistance to streptomycin and tetracycline. The following resistance genes were detected: bla(TEM) (20 of 22 ampicillin-resistant isolates), tet(A) and/or tet(B) ...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.038364-0

    authors: Radhouani H,Poeta P,Gonçalves A,Pacheco R,Sargo R,Igrejas G

    更新日期:2012-06-01 00:00:00

  • Association of Aeromonas spp. with travellers' diarrhoea in Finland.

    abstract::The association of Aeromonas spp. with travellers' diarrhoea was studied among 978 Finnish tourists travelling to Morocco in winter (n = 398) and autumn (n = 580) in 1989. Fifty-five isolates from diarrhoeal patients with (n = 16) or without (n = 39) a recent travelling history in a developing country were also includ...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-42-1-26

    authors: Hänninen ML,Salmi S,Mattila L,Taipalinen R,Siitonen A

    更新日期:1995-01-01 00:00:00

  • Induction of granulomas in interferon-gamma gene-disrupted mice by avirulent but not by virulent strains of Mycobacterium tuberculosis.

    abstract::To gain a better understanding of the pathological role of interferon-gamma (IFN-gamma) in specific granuloma formation, IFN-gamma gene-deficient mice (BALB/c and C57BL/6) were produced. The IFN-gamma gene in embryonic stem (ES) cells was disrupted by inserting the beta-galactosidase gene (lacZ) and the neomycin resis...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-47-10-871

    authors: Sugawara I,Yamada H,Kazumi Y,Doi N,Otomo K,Aoki T,Mizuno S,Udagawa T,Tagawa Y,Iwakura Y

    更新日期:1998-10-01 00:00:00

  • Liposomal encapsulation augments delayed hypersensitivity reactions to tuberculin proteins.

    abstract::Encapsulation of purified tuberculoproteins in liposomes augmented their ability to elicit delayed hypersensitivity reactions in BCG-immune rats. The effect was most marked with a low-molecular-weight tuberculopeptide that was relatively poor at eliciting reactions when in free form. These findings indicate that, in a...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-18-3-429

    authors: Pimm MV,Baldwin RW

    更新日期:1984-12-01 00:00:00

  • The immunoglobulin response to individual HSV-1 viral polypeptides: kinetics of the response during primary and secondary experimental infection with herpes simplex virus.

    abstract::We studied the immunoglobulin response to individual viral polypeptides in experimental primary and secondary infection with herpes simplex virus (HSV)-1 in mice. After a single footpad inoculation with 10(5.6) pfu of HSV-1, immunoglobulin to proteins mol. wts (10(3)) 44 and 75 appeared on day 7. Antibodies to gB, gC,...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-25-1-59

    authors: McKendall RR,Pettit M,Woo W

    更新日期:1988-01-01 00:00:00

  • Mechanism of persistent infection associated with peritoneal implants.

    abstract::The ability of rabbits to clear an intraperitoneal injection of Pseudomonas aeruginosa in the presence or absence of a surgically implanted peritoneal device was investigated. Sham-operated rabbits without an implant eliminated a P. aeruginosa challenge of 5 x 10(6) cfu/ml; lavage fluid and peritoneal tissues became c...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-36-6-406

    authors: Ward KH,Olson ME,Lam K,Costerton JW

    更新日期:1992-06-01 00:00:00

  • Molecular epidemiology of an outbreak of multiresistant Klebsiella pneumoniae in a Tunisian neonatal ward.

    abstract::During the first quarter of 1996, a major outbreak of clinical infection caused by multiresistant Klebsiella pneumoniae (MRKP) occurred in the neonatal ward of the 'Maternité Wassila Bourguiba' in Tunis, Tunisia. In total, 32 isolates of MRKP, comprising 23 clinical isolates and nine surveillance isolates, were recove...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/jmm.0.04981-0

    authors: Ben-Hamouda T,Foulon T,Ben-Cheikh-Masmoudi A,Fendri C,Belhadj O,Ben-Mahrez K

    更新日期:2003-05-01 00:00:00

  • The importance of prolonged incubation for the synthesis of dimethylnitrosamine by enterobacteria.

    abstract::Tests with 140 strains representing Escherichia coli, Klebsiella aerogenes, K. ozaenae, Proteus mirabilis, P. vulgaris, P. rettgeri and P. morganii in a defined medium supplemented with 0-09M dimethylamine (DMA) and 0-1M potassium nitrate showed that at least 89% of the 136 strains able to reduce nitrates produced up ...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-9-2-211

    authors: Coloe PJ,Hayward NJ

    更新日期:1976-05-01 00:00:00

  • Lior-serotype variants in Campylobacter isolates from the same stool sample.

    abstract::Campylobacter strains isolated from the same stool sample were characterised by determination of biochemical properties and both heat-labile (Lior) and heat-stable (Lauwers) serotypes. In six of 60 campylobacter-infected stools, two or three strains differing in Lior-serotype were isolated from the same stool. In four...

    journal_title:Journal of medical microbiology

    pub_type: 杂志文章

    doi:10.1099/00222615-38-1-3

    authors: Zöllner B,Wuthe HH

    更新日期:1993-01-01 00:00:00