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https://www.readbyqxmd.com/read/28403204/improving-specificity-of-bordetella-pertussis-detection-using-a-four-target-real-time-pcr
#1
Helena Martini, Liselot Detemmerman, Oriane Soetens, Erlangga Yusuf, Denis Piérard
The incidence of whooping cough, a contagious respiratory disease caused by Bordetella pertussis, is on the rise despite existing vaccination programmes. Similar, though usually milder, respiratory symptoms may be caused by other members of the Bordetella genus: B. parapertussis, B. holmesii, and B. bronchiseptica. Pertussis diagnosis is mostly done using PCR, but the use of multiple targets is necessary in order to differentiate the different Bordetella spp. with sufficient sensitivity and specificity. In this study we evaluate a multiplex PCR assay for the differentiation of B...
2017: PloS One
https://www.readbyqxmd.com/read/28403138/bordetella-bronchiseptica-exploits-the-complex-life-cycle-of-dictyostelium-discoideum-as-an-amplifying-transmission-vector
#2
Dawn L Taylor-Mulneix, Liron Bendor, Bodo Linz, Israel Rivera, Valerie E Ryman, Kalyan K Dewan, Shannon M Wagner, Emily F Wilson, Lindsay J Hilburger, Laura E Cuff, Christopher M West, Eric T Harvill
Multiple lines of evidence suggest that Bordetella species have a significant life stage outside of the mammalian respiratory tract that has yet to be defined. The Bordetella virulence gene (BvgAS) two-component system, a paradigm for a global virulence regulon, controls the expression of many "virulence factors" expressed in the Bvg positive (Bvg+) phase that are necessary for successful respiratory tract infection. A similarly large set of highly conserved genes are expressed under Bvg negative (Bvg-) phase growth conditions; however, these appear to be primarily expressed outside of the host and are thus hypothesized to be important in an undefined extrahost reservoir...
April 2017: PLoS Biology
https://www.readbyqxmd.com/read/28403055/immunogenicity-and-safety-of-10-valent-pneumococcal-nontypeable-haemophilus-influenzae-protein-d-conjugate-vaccine-phid-cv-administered-to-children-with-sickle-cell-disease-between-8-weeks-and-2-years-of-age-a-phase-iii-open-controlled-study
#3
Sodiomon B Sirima, Alfred Tiono, Zakaria Gansané, Mohamadou Siribié, Angèle Zongo, Alphonse Ouédraogo, Nancy François, Ana Strezova, Kurt Dobbelaere, Dorota Borys
BACKGROUND: Immunogenicity, safety and reactogenicity of the 10-valent pneumococcal nontypeable Haemophilus influenzae protein D conjugate vaccine (PHiD-CV) were evaluated in children with sickle cell disease (SCD), who are at increased risk for infections. METHODS: In this phase III, open-label, single-center, controlled study in Burkina Faso (NCT01175083), children with SCD (S) or without SCD (NS) were assigned to 6 groups (N = 300): children 8-11 weeks of age (<6 months; <6S and <6NS groups) received 3 primary doses and a booster dose of PHiD-CV coadministered with routine childhood vaccines; children 7-11 months of age (7-11S and 7-11NS groups) received 2 primary doses and a booster dose of PHiD-CV; children 12-23 months of age (12-23S and 12-23NS groups) received 2 catch-up doses of PHiD-CV...
May 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28397465/variation-of-housekeeping-genes-in-clinical-isolates-and-vaccine-strains-of-bordetella-pertussis
#4
Masoumeh Fathi, Faezeh Haghighi, Fereshteh Shahcheraghi, Ebrahim Abbasi, Seyed Saeed Eshraghi, Sedighe Ghourchian, Hojjat Zeraati, Mehdi Yaseri, Masoumeh Douraghi, Fazel Shokri
BACKGROUND: Bordetella pertussis causes serious contagious infections, primarily in childhood. A whole-cell vaccine, diphtheria-tetanus-whole cell pertussis (DTwP), has been used to protect against pertussis in children in Iran, but the pertussis cases have been increasing during recent years. We determined the allelic variation level of housekeeping genes in isolates recovered from pertussis patients and vaccine strains used in national vaccination program. METHODS: Five clinical isolates, 2 vaccine strains and a Tohama I strain were studied through multilocus sequence typing (MLST) of housekeeping genes...
April 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28396322/camp-elevating-capacity-of-the-adenylate-cyclase-toxin-hemolysin-is-sufficient-for-lung-infection-but-not-for-full-virulence-of-bordetella-pertussis
#5
Karolina Skopova, Barbora Tomalova, Ivan Kanchev, Pavel Rossmann, Martina Svedova, Irena Adkins, Ilona Bibova, Jakub Tomala, Jiri Masin, Nicole Guiso, Radim Osicka, Radislav Sedlacek, Marek Kovar, Peter Sebo
The adenylate cyclase toxin-hemolysin (CyaA, ACT or AC-Hly) of Bordetella pertussis targets phagocytic cells expressing the complement receptor 3 (CR3, Mac-1, αMβ2 integrin or CD11b/CD18). CyaA delivers into cells an N-terminal adenylyl cyclase (AC) enzyme domain that is activated by cytosolic calmodulin and catalyzes unregulated conversion of cellular ATP into cAMP, a key second messenger subverting bactericidal activities of phagocytes. In parallel, the hemolysin (Hly) moiety of CyaA forms cation-selective hemolytic pores that permeabilize target cell membranes...
April 10, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28396321/albumin-in-the-presence-of-calcium-elicits-a-massive-increase-in-extracellular-bordetella-adenylate-cyclase-toxin
#6
Laura A Gonyar, Mary C Gray, Gregory J Christianson, Borna Mehrad, Erik L Hewlett
Pertussis (whooping cough), caused by Bordetella pertussis (Bp), is resurging in the United States and worldwide. Adenylate cyclase toxin (ACT) is a critical factor in establishing infection with Bp and acts by specifically inhibiting the response of myeloid leukocytes to the pathogen. We report here that serum components, as discovered during growth in fetal bovine serum (FBS), elicit a robust increase in the amount of ACT, and ≥90% of this ACT is localized to the supernatant, unlike growth without FBS in which ≥90% is associated with the bacterium...
April 10, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28394915/development-of-a-qualitative-assay-for-screening-of-bordetella-pertussis-isolates-for-pertussis-toxin-production
#7
Irina Gates, Marina DuVall, Hong Ju, M Lucia Tondella, Lucia Pawloski
Bordetella pertussis infection has been increasing in the US, with reported cases reaching over 50,000 in 2012, a number last observed in the 1950s. Concurrently, B. pertussis lacking the pertactin protein, one of the immunogens included in the acellular vaccine formulations, has rapidly emerged since 2010, and has become the predominant circulating phenotype. Monitoring the production of the remaining acellular vaccine immunogens, such as pertussis toxin (Pt), is a critical next step. To date, methods for screening Pt have been either through genomic sequencing means or by conventional ELISAs...
2017: PloS One
https://www.readbyqxmd.com/read/28394806/immunogenicity-of-pertussis-booster-vaccination-in-children-and-adolescents-with-inflammatory-bowel-disease-a-controlled-study
#8
Aleksandra Banaszkiewicz, Agnieszka Gawronska, Beata Klincewicz, Anna Kofla-Dłubacz, Urszula Grzybowska-Chlebowczyk, Ewa Toporowska-Kowalska, Ilona Malecka, Joanna Stryczynska-Kazubska, Wojciech Feleszko, Izabella Lazowska-Przeorek, Katarzyna Karolewska-Bochenek, Jarosław Walkowiak, Janusz Slusarczyk, Andrzej Radzikowski, Urszula Demkow, Piotr Albrecht
BACKGROUND: There are limited data on antibody response to vaccination in patients with inflammatory bowel disease (IBD). In this study, we aimed to assess the immunogenicity of a booster dose of pertussis vaccine in pediatric patients with IBD and to compare their response with healthy controls. METHODS: We performed a multicenter, prospective, and controlled trial. Eligible for inclusion were children and adolescents (11-18 year olds), with no history of pertussis booster immunization after the age of 6 years or history of pertussis...
May 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28384882/polymyxin-b-induced-diffuse-cutaneous-hyperpigmentation
#9
Sandeep Lahiry, Shouvik Choudhury, Ayan Mukherjee, Prajesh Kiran Bhunya, Moumita Bala
Polymyxin B is a polypeptide-antibiotic, primarily used for resistant Gram-negative infections, first obtained from bacterium Bacillus polymyxa in the late 1940s. Antibiotic spectrum are restricted to mainly gram negative bacterias like Enterobacter, E. coli, Klebsiella, Salmonella, Pasteurella, Bordetella, Shigella; and particularly organisms like Pseudomonas aeruginosa and Acinetobacter baumannii, which are extremely potent to acquire antibiotic resistance. Side effects include neurotoxicity and acute renal tubular necrosis...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28377885/draft-genome-of-bordetella-pseudohinzii-bh370-isolated-from-trachea-and-lung-tissues-of-a-laboratory-mouse
#10
Shih Keng Loong, Kim-Kee Tan, Syuhaida Sulaiman, Pooi Fong Wong, Sazaly AbuBakar
In this study, we present the draft genome sequence of B. pseudohinzii BH370 recovered from the trachea and lung tissues of an ICR mouse in Malaysia. The genome consists of 4,474,040 bp with a GC content of 66.4%. Annotation using RAST algorithm displayed 5119 protein encoding and 52 RNA genes. The CRISPR-cas genomic sequences previously reported in B. pseudohinzii were identified. The nucleotide sequences of BH370 was deposited into the European Nucleotide Archive under the genome assembly accession number FPJN01000000...
June 2017: Genomics Data
https://www.readbyqxmd.com/read/28376777/assessment-of-safety-and-efficacy-against-bordetella-pertussis-of-a-new-tetanus-reduced-dose-diphtheria-acellular-pertussis-vaccine-in-a-murine-model
#11
Hyo Jin Kwon, Seung Beom Han, Bo Ram Kim, Kyu Ri Kang, Dong Ho Huh, Gi Sub Choi, Dong Ho Ahn, Jin Han Kang
BACKGROUND: Tetanus-reduced dose diphtheria-acellular pertussis (Tdap) vaccination during adolescence was introduced in response to the resurgence of pertussis in various countries. A new Tdap vaccine was manufactured in Korea as a countermeasure against a predicted Tdap vaccine shortage. This study was performed to evaluate the immunogenicity, safety, and protection efficacy against Bordetella pertussis of the new Tdap vaccine in a murine model. METHODS: Four-week-old BABL/c mice were used for assessment of immunogenicity and protection efficacy...
April 4, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28376739/seroprevalence-of-bordetella-pertussis-antibodies-in-adults-in-hungary-results-of-an-epidemiological-cross-sectional-study
#12
Péter Torzsa, Raghavendra Devadiga, Monica Tafalla
BACKGROUND: Pertussis (whooping cough) is well known to be underreported, particularly among adults, who can act as an infectious reservoir, potentially putting susceptible newborns at risk of serious illness. The purpose of this study was to estimate the seroprevalence of pertussis in adults in Hungary. METHODS: This epidemiological, cross-sectional study was conducted in adults in five general practitioners' practices in Hungary. Serum anti-pertussis toxin immunoglobulin G (anti-PT IgG) antibody levels were analyzed using enzyme-linked immunosorbent assay...
April 4, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28376442/prevalence-of-atypical-pathogens-in-patients-with-cough-and-community-acquired-pneumonia-a-meta-analysis
#13
REVIEW
Christian Marchello, Ariella Perry Dale, Thuy Nhu Thai, Duk Soo Han, Mark H Ebell
PURPOSE: Community-acquired pneumonia (CAP), acute cough, bronchitis, and lower respiratory tract infections (LRTI) are often caused by infections with viruses or Streptococcus pneumoniae. The prevalence of atypical pathogens Mycoplasma pneumoniae, Chlamydophila pneumoniae, Legionella pneumophila, and Bordetella pertussis among patients with these illnesses in the ambulatory setting has not been previously summarized. We set out to derive prevalence information from the existing literature...
November 2016: Annals of Family Medicine
https://www.readbyqxmd.com/read/28374129/dot-immunoassay-for-the-simultaneous-determination-of-postvaccination-immunity-against-pertussis-diphtheria-and-tetanus
#14
Pavel Khramtsov, Maria Bochkova, Valeria Timganova, Svetlana Zamorina, Mikhail Rayev
A dot immunoassay for simultaneous semiquantitative detection of IgG against tetanus toxoid (Ttx) and diphtheria toxoid (Dtx) and qualitative detection of anti-Bordetella pertussis IgGs in human blood serum using carbon nanoparticles functionalized with streptococcal protein G was developed. Inactivated B. pertussis cells in suspension form were used as an antigen in the immunoassay. Pertussis, tetanus, and diphtheria antigens were separately spotted onto nitrocellulose strips, and then the immunostrips were successively incubated with blood sera and a suspension of carbon nanoparticles...
April 3, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28369675/analysis-of-membrane-protein-interactions-with-a-bacterial-adenylate-cyclase-based-two-hybrid-bacth-technique
#15
Scot P Ouellette, Gouzel Karimova, Marilyne Davi, Daniel Ladant
The bacterial two-hybrid (BACTH, for "Bacterial Adenylate Cyclase-based Two-Hybrid") technique is a simple and fast genetic approach to analyze protein-protein interactions in vivo. In this system, the proteins of interest are genetically fused to two complementary fragments from the catalytic domain of Bordetella pertussis adenylate cyclase and co-expressed in strains of Escherichia coli deficient in adenylate cyclase. Association of the hybrid proteins restores synthesis of cyclic AMP (cAMP), which then triggers the expression of catabolic operons such as the lactose operon or the maltose regulon...
April 3, 2017: Current Protocols in Molecular Biology
https://www.readbyqxmd.com/read/28369240/do-pertussis-vaccines-protect-against-bordetella-parapertussis
#16
Juventila Liko, Steve G Robison, Paul R Cieslak
We calculated the effectiveness of pertussis vaccine in preventing parapertussis among Oregon children 2 months to 10 years of age using two methods. During 2011-2016, the two VE methods found 66% (95% CI 59-75%) and 82% (95% CI 69-90%) effectiveness against parapertussis. Pertussis vaccine may induce cross-immunity.
March 22, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28355615/bordetella-pertussis-infections-in-travelers-data-from-the-geosentinel-global-network
#17
Felipe Barbosa, Elizabeth D Barnett, Philippe Gautret, Patricia Schlagenhauf, Perry J J van Genderen, Martin P Grobusch, Bradley A Connor, Davidson H Hamer, Natasha S Hochberg
Background: Pertussis is a highly contagious, vaccine-preventable respiratory infection that is endemic worldwide. There are limited data regarding the occurrence of pertussis in travelers. The objective of this study is to identify travel-related pertussis cases reported to the GeoSentinel Surveillance Network. Methods: This is a descriptive, retrospective analysis of GeoSentinel records from 25 travel/tropical medicine clinics in 16 countries. Frequencies of demographic and travel-related characteristics and symptoms of 74 cases of pertussis in travelers and new immigrants from 1999 to 2015 were analysed...
May 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28348142/survey-of-susceptibility-to-marbofloxacin-in-bacteria-isolated-from-diseased-pigs-in-europe
#18
F El Garch, S Kroemer, D Galland, I Morrissey, F Woehrle
A monitoring programme of marbofloxacin susceptibility of bacteria from Europe causing respiratory tract infection and meningitis in pigs has been active since 1994 and 2002, respectively. Monitoring digestive, metritis and urinary tract infection (UTI) in pigs has been active since 2005 and susceptibility results until 2013 are presented. Minimum inhibitory concentration (MIC) was determined by broth microdilution. For MIC interpretation, Vétoquinol-evaluated breakpoints were applied. For digestive pathogens, Escherichia coli and Salmonella species (1717 and 300 isolates, respectively) exhibited 7...
March 27, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28348085/the-extent-of-the-temperature-induced-membrane-remodeling-in-two-closely-related-bordetella-species-reflects-their-adaptation-to-diverse-environmental-niches
#19
Gabriela Seydlova, Jana Beranova, Ilona Bibova, Ana Dienstbier, Jakub Drzmisek, Jiri Masin, Radovan Fiser, Ivo Konopasek, Branislav Vecerek
Changes in environmental temperature represent one of the major stresses faced by microorganisms as it affects the function of the cytoplasmic membrane. In this study we have analyzed the thermal adaptation in two closely related respiratory pathogens Bordetella pertussis and Bordetella bronchiseptica. While B. pertussis represents a pathogen strictly adapted to the human body temperature, B. bronchiseptica causes infection in a broad range of animals and survives also outside of the host. We applied GC-MS to determine the fatty acids of both Bordetella species grown at different temperatures and analyzed the membrane fluidity by fluorescence anisotropy measurement...
March 27, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28344193/polyphasic-insights-into-the-microbiomes-of-the-takamatsuzuka-tumulus-and-kitora-tumulus
#20
Junta Sugiyama, Tomohiko Kiyuna, Miyuki Nishijima, Kwang-Deuk An, Yuka Nagatsuka, Nozomi Tazato, Yutaka Handa, Junko Hata-Tomita, Yoshinori Sato, Rika Kigawa, Chie Sano
Microbial outbreaks and related biodeterioration problems have affected the 1300-year-old multicolor (polychrome) mural paintings of the special historic sites Takamatsuzuka Tumulus (TT) and Kitora Tumulus (KT). Those of TT are designated as a national treasure. The microbiomes of these tumuli, both located in Asuka village, Nara, Japan, are critically reviewed as the central subject of this report. Using culture-dependent methods (conventional isolation and cultivation), we conducted polyphasic studies of the these microbial communities and identified the major microbial colonizers (Fusarium spp...
March 24, 2017: Journal of General and Applied Microbiology
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