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https://www.readbyqxmd.com/read/29776375/range-wide-genetic-analysis-of-dermacentor-variabilis-and-its-francisella-like-endosymbionts-demonstrates-phylogeographic-concordance-between-both-taxa
#1
Emily L Kaufman, Nathan E Stone, Glen A Scoles, Crystal M Hepp, Joseph D Busch, David M Wagner
BACKGROUND: The American dog tick, Dermacentor variabilis, is an important vector of pathogens to humans, wildlife and domestic animals in North America. Although this tick species is widely distributed in the USA and Canada, knowledge of its range-wide phylogeographic patterns remains incomplete. METHODS: We carried out a phylogenetic analysis of D. variabilis using samples collected from 26 USA states and five Canadian provinces. Tick samples (n = 1053 in total) originated from two main sources: existing archives (2000-2011), and new collections made from 2012 to 2013...
May 18, 2018: Parasites & Vectors
https://www.readbyqxmd.com/read/29764368/airborne-geographical-dispersal-of-q-fever-from-livestock-holdings-to-human-communities-a-systematic-review-and-critical-appraisal-of-evidence
#2
Nicholas J Clark, Ricardo J Soares Magalhães
BACKGROUND: Q fever is a zoonotic disease caused by Coxiella burnetii. This bacterium survives harsh conditions and attaches to dust, suggesting environmental dispersal is a risk factor for outbreaks. Spatial epidemiology studies collating evidence on Q fever geographical contamination gradients are needed, as human cases without occupational exposure are increasing worldwide. METHODS: We used a systematic literature search to assess the role of distance from ruminant holdings as a risk factor for human Q fever outbreaks...
May 15, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29748120/diversity-of-coxiella-like-and-francisella-like-endosymbionts-and-rickettsia-spp-coxiella-burnetii-as-pathogens-in-the-tick-populations-of-slovakia-central-europe
#3
Eva Špitalská, Olivier Sparagano, Michal Stanko, Katarína Schwarzová, Zdenko Špitalský, Ľudovít Škultéty, Sabína Fumačová Havlíková
Ticks are important vectors of pathogens affecting humans and animals worldwide. They do not only carry pathogens but diverse commensal and symbiotic microorganisms are also present in ticks. A molecular screening for tick-borne pathogens and endosymbionts was carried out in Ixodes ricinus, Dermacentor reticulatus and Haemaphysalis inermis questing ticks collected in Slovakia. The presence of Rickettsia spp., Coxiella burnetii, Coxiella-like and Francisella-like microorganisms was evaluated by PCR in 605 individuals and by randomly sequencing 66 samples...
May 3, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29742157/an-optimal-set-of-features-for-predicting-type-iv-secretion-system-effector-proteins-for-a-subset-of-species-based-on-a-multi-level-feature-selection-approach
#4
Zhila Esna Ashari, Nairanjana Dasgupta, Kelly A Brayton, Shira L Broschat
Type IV secretion systems (T4SS) are multi-protein complexes in a number of bacterial pathogens that can translocate proteins and DNA to the host. Most T4SSs function in conjugation and translocate DNA; however, approximately 13% function to secrete proteins, delivering effector proteins into the cytosol of eukaryotic host cells. Upon entry, these effectors manipulate the host cell's machinery for their own benefit, which can result in serious illness or death of the host. For this reason recognition of T4SS effectors has become an important subject...
2018: PloS One
https://www.readbyqxmd.com/read/29692913/first-report-of-coxiella-burnetii-and-borrelia-burgdorferi-sensu-lato-in-poultry-red-mites-dermanyssus-gallinae-mesostigmata-acari-related-to-urban-outbreaks-of-dermatitis-in-italy
#5
D A Raele, D Galante, N Pugliese, G La Salandra, M Lomuto, M Assunta Cafiero
The poultry red mite (PRM), Dermanyssus gallinae, is a nonburrowing haematophagous nest-dwelling ectoparasite of birds; occasionally it bites humans, inducing dermatitis. The possibility that this parasite may also be involved in transmission of pathogens is an additional concern. We investigated the presence of zoonotic agents in PRMs from bird nests and pets, and related them to urban outbreaks of dermatitis. A total of 98 PRMs from 12 outbreaks of PRM dermatitis that occurred in Italian cities from 2001 to 2017 were molecularly investigated for detection of Coxiella spp...
May 2018: New Microbes and New Infections
https://www.readbyqxmd.com/read/29692911/comparison-of-genomes-of-coxiella-burnetii-strains-using-formal-order-analysis
#6
S N Shpynov, I V Tarasevich, A A Skiba, N N Pozdnichenko, A S Gumenuk
The  Coxiella burnetii strain NL3262 was isolated during the Q fever outbreak in the Netherlands in 2007-2010. Formal-order analysis (FOA) was used to study the similarity of the genome (chromosome and plasmid) of this strain with the genomes from other strains. Chromosomes from ten C. burnetii strains and eight plasmids were studied with FOA tools such as 'Map of genes' and 'Matrix of similarity.' The 'Map of genes' tool showed that the chromosome of strain C. burnetii str. NL3262 distanced itself by the index of average remoteness ( g ) of 1...
May 2018: New Microbes and New Infections
https://www.readbyqxmd.com/read/29685511/primary-and-secondary-arterial-fistulas-during-chronic-q-fever
#7
Steffi Karhof, Sonja E van Roeden, Jan J Oosterheert, Chantal P Bleeker-Rovers, Nicole H M Renders, Gert J de Borst, Linda M Kampschreur, Andy I M Hoepelman, Olivier H J Koning, Peter C Wever
OBJECTIVE: After primary infection with Coxiella burnetii, patients may develop acute Q fever, which is a relatively mild disease. A small proportion of patients (1%-5%) develop chronic Q fever, which is accompanied by high mortality and can be manifested as infected arterial or aortic aneurysms or infected vascular prostheses. The disease can be complicated by arterial fistulas, which are often fatal if they are left untreated. We aimed to assess the cumulative incidence of arterial fistulas and mortality in patients with proven chronic Q fever...
April 20, 2018: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/29680799/rare-case-of-otomastoiditis-due-to-coxiella-burnetii-chronic-infection
#8
Mariana Gonçalves, Sónia Moreira, Elsa Gaspar, Lèlita Santos
Q fever is a zoonotic disease caused by Coxiella burnetii that usually presents with non-specific or benign constitutional symptoms. Diagnosis is often challenging and, after acute Q fever, 1%-5% of patients can develop chronic disease. We present an 80-year-old male patient who was admitted due to a 3 months history of fever, productive cough, myalgia, weight loss, headache and hearing loss. Chronic Q fever was confirmed by positive antiphase I immunoglobulin G. Frequent locations of chronic infection was discarded, and ear CT revealed a right mastoid infection...
April 21, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29678402/golden-jackals-canis-aureus-as-hosts-for-ticks-and-tick-borne-pathogens-in-serbia
#9
Ratko Sukara, Dimosthenis Chochlakis, Duško Ćirović, Aleksandra Penezić, Darko Mihaljica, Sanja Ćakić, Miroslav Valčić, Yannis Tselentis, Anna Psaroulaki, Snežana Tomanović
The golden jackal (Canis aureus) is a medium-sized canid species native to Europe. This species is characterized by rapid large-scale expansion. A similar trend is also observed in Serbia, where the species is now distributed in more than a half of the territory. Although jackals prefer habitats in human-dominated landscapes, these animals have not been studied well enough from an eco-epidemiological point of view, and little is known about their potential for carrying zoonotic pathogens. In a study conducted during a three-year period (01/2010-02/2013), a total of 216 hunted or road-killed golden jackals were collected from 10 localities in Serbia...
April 10, 2018: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/29677211/correction-mechanisms-of-action-of-coxiella-burnetii-effectors-inferred-from-host-pathogen-protein-interactions
#10
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0188071.].
2018: PloS One
https://www.readbyqxmd.com/read/29675780/seroprevalence-of-brucellosis-and-q-fever-coxiellosis-in-cattle-herds-in-maigana-and-birnin-gwari-agro-ecological-zone-of-kaduna-state-nigeria
#11
S G Adamu, J Kabir, J U Umoh, M A Raji
A cross sectional study was conducted to determine the seroprevalence and risk factors of brucellosis and Q fever in cattle in Maigana and Birnin Gwari agro-ecological zone of Kaduna State, Nigeria. This study aimed at determining the significance of Brucella spp. and Coxiella burnetti infections in cattle. A total of 400 sera samples (139 from males and 261 from females cattle) were collected and screened for brucellosis using Rose Bengal Plate test (RBPT) and competitive enzyme linked immunosorbent assay (cELISA) for brucellosis and indirect enzyme-linked immunosorbent assay (iELISA) for Q fever...
April 19, 2018: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/29668757/actin-polymerization-in-the-endosomal-pathway-but-not-on-the-coxiella-containing-vacuole-is-essential-for-pathogen-growth
#12
Heather E Miller, Charles L Larson, Robert A Heinzen
Coxiella burnetii is an intracellular bacterium that replicates within an expansive phagolysosome-like vacuole. Fusion between the Coxiella-containing vacuole (CCV) and late endosomes/multivesicular bodies requires Rab7, the HOPS tethering complex, and SNARE proteins, with actin also speculated to play a role. Here, we investigated the importance of actin in CCV fusion. Filamentous actin patches formed around the CCV membrane that were preferred sites of vesicular fusion. Accordingly, the mediators of endolysosomal fusion Rab7, VAMP7, and syntaxin 8 were concentrated in CCV actin patches...
April 18, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29665869/review-risks-of-disease-transmission-through-semen-in-cattle
#13
M D Givens
The purpose of this paper is to review scientific evidence concerning pathogens that could potentially be transmitted via bovine semen. As a result of a careful analysis of the characteristics of infections that may cause transmission of disease through semen, effective control procedures can be identified that provide minimal constraint to the introduction of new bulls into herds for natural breeding and importation of valuable novel genetics through artificial insemination. The potential for transmission through bovine semen and corresponding effective control procedures are described for bovine herpesvirus 1, bovine viral diarrhea virus, bovine leukemia virus, lumpy skin disease virus, bluetongue virus, foot-and-mouth disease virus, and Schmallenberg virus...
April 18, 2018: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/29665523/revealing-the-microbiota-of-marketed-edible-insects-through-pcr-dgge-metagenomic-sequencing-and-real-time-pcr
#14
Andrea Osimani, Vesna Milanović, Cristiana Garofalo, Federica Cardinali, Andrea Roncolini, Riccardo Sabbatini, Francesca De Filippis, Danilo Ercolini, Claudia Gabucci, Annalisa Petruzzelli, Franco Tonucci, Francesca Clementi, Lucia Aquilanti
The present study aimed to identify the microbiota present in six species of processed edible insects produced in Thailand and marketed worldwide via the internet, namely, giant water bugs (Belostoma lutarium), black ants (Polyrhachis), winged termites (alates, Termitoidae), rhino beetles (Hyboschema contractum), mole crickets (Gryllotalpidae), and silkworm pupae (Bombyx mori). For each species, two samples of boiled, dried and salted insects were purchased. The microbial DNA was extracted from the insect samples and subjected to polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE), high-throughput sequencing and qualitative real-time PCR assays...
April 11, 2018: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29664950/body-lice-of-homeless-people-reveal-the-presence-of-several-emerging-bacterial-pathogens-in-northern-algeria
#15
Meriem Louni, Nassima Mana, Idir Bitam, Mustapha Dahmani, Philippe Parola, Florence Fenollar, Didier Raoult, Oleg Mediannikov
BACKGROUND: Human lice, Pediculus humanus, are obligate blood-sucking parasites. Body lice, Pediculus h. humanus, occur in two divergent mitochondrial clades (A and D) each exhibiting a particular geographic distribution. Currently, the body louse is recognized as the only vector for louse-borne diseases. In this study, we aimed to study the genetic diversity of body lice collected from homeless populations in three localities of northern Algeria, and to investigate louse-borne pathogens in these lice...
April 17, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29664701/prevalence-of-selected-zoonotic-diseases-and-risk-factors-at-a-human-wildlife-livestock-interface-in-mpumalanga-province-south-africa
#16
Gregory J G Simpson, Vanessa Quan, John Frean, Darryn L Knobel, Jennifer Rossouw, Jacqueline Weyer, Tanguy Marcotty, Jacques Godfroid, Lucille H Blumberg
A lack of surveillance and diagnostics for zoonotic diseases in rural human clinics limits clinical awareness of these diseases. We assessed the prevalence of nine zoonotic pathogens in a pastoral, low-income, HIV-endemic community bordering wildlife reserves in South Africa. Two groups of participants were included: malaria-negative acute febrile illness (AFI) patients, called febrilers, at three clinics (n = 74) and second, farmers, herders, and veterinary staff found at five government cattle dip-tanks, called dip-tanksters (n = 64)...
April 17, 2018: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/29661138/a-coxiella-burnetii-phospholipase-a-homolog-plda-is-required-for-optimal-growth-in-macrophages-and-developmental-form-lipid-remodeling
#17
Christopher M Stead, Diane C Cockrell, Paul A Beare, Heather E Miller, Robert A Heinzen
BACKGROUND: Many gram-negative bacteria produce an outer membrane phospholipase A (PldA) that plays an important role in outer membrane function and is associated with virulence. RESULTS: In the current study, we characterized a pldA mutant of Coxiella burnetii, an intracellular gram-negative pathogen and the agent of human Q fever. The C. burnetti pldA open reading frame directs synthesis of a protein with conserved PldA active site residues. A C. burnetii ΔpldA deletion mutant had a significant growth defect in THP-1 macrophages, but not axenic medium, that was rescued by complementation...
April 16, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29659760/coxiella-burnetii-a-hidden-pathogen-in-interstitial-lung-disease
#18
Cléa Melenotte, Jalal-Jean Izaaryene, Carine Gomez, Marion Delord, Elsa Prudent, Hubert Lepidi, Oleg Mediannikov, Marion Lacoste, Felix Djossou, Alexandre Mania, Noelle Bernard, Eric Huchot, Jean-Louis Mège, Fabienne Brégeon, Didier Raoult
We report 7 patients with interstitial lung disease (ILD) on CT-scan reviewing. C. burnetii was diagnosed in situ in one lung biopsy performed. All patients had advanced interstitial lung fibrosis and persistent C. burnetii infection. Q fever may be a cofactor of ILD, especially in endemic areas.
April 6, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29651977/antimicrobial-resistance-in-chlamydiales-rickettsia-coxiella-and-other-intracellular-pathogens
#19
Daisy Vanrompay, Thi Loan Anh Nguyen, Sally J Cutler, Patrick Butaye
This article will provide current insights into antimicrobial susceptibilities and resistance of an important group of bacterial pathogens that are not phylogenetically related but share lifestyle similarities in that they are generally considered to be obligate intracellular microbes. As such, there are shared challenges regarding methods for their detection and subsequent clinical management. Similarly, from the laboratory perspective, susceptibility testing is rarely undertaken, though molecular approaches might provide new insights...
April 2018: Microbiology Spectrum
https://www.readbyqxmd.com/read/29650493/exposure-to-coxiella-burnetii-and-risk-of-non-hodgkin-lymphoma-a-retrospective-population-based-analysis-in-the-netherlands
#20
Sonja E van Roeden, Fedor van Houwelingen, Chiel M J Donkers, Sander J Hogewoning, Marit M A de Lange, Wim van der Hoek, Linda M Kampschreur, Marc J M Bonten, Andy I M Hoepelman, Chantal P Bleeker-Rovers, Peter C Wever, Jan Jelrik Oosterheert
BACKGROUND: An association between Coxiella burnetii and non-Hodgkin lymphoma has been suggested. After a large Q fever epidemic in the Netherlands (2007-10), we postulated that the incidence of non-Hodgkin lymphoma would be increased during and after the epidemic in areas with a high endemicity of Q fever compared with those with low endemicity. METHODS: We did a retrospective population-based analysis and calculated relative risks (RRs) of non-Hodgkin lymphoma during 1-year periods before, during, and after the Q fever epidemic, for areas with intermediate and high endemicity of Q fever compared with low endemic areas...
April 9, 2018: Lancet Haematology
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