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Chlamydia pneumoniae

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https://www.readbyqxmd.com/read/29345007/aetiology-of-neonatal-conjunctivitis-evaluated-in-a-population-based-setting
#1
Minna Honkila, Marjo Renko, Irma Ikäheimo, Tytti Pokka, Matti Uhari, Terhi Tapiainen
AIM: Our aim was to study prospectively the aetiology of neonatal conjunctivitis in a population-based setting. METHODS: Altogether 173 neonates with clinical conjunctivitis aged on average 20 (SD 10) days were recruited from child welfare clinics in Oulu, Finland, in 2010-2015. Conjunctival specimens were collected from 167 neonates for multiplex polymerase chain reaction to detect 16 respiratory viruses, from 163 for polymerase chain reaction to detect Chlamydia trachomatis and Neisseria gonorrhoeae and from 160 for bacterial culture studies...
January 18, 2018: Acta Paediatrica
https://www.readbyqxmd.com/read/29332707/cutaneous-hemophagocytosis-clinicopathologic-features-of-21-cases
#2
Francesca Boggio, Viviana Lora, Carlo Cota, Amanda Pereira, Robert Müllegger, Lucia Prieto-Torres, Lorenzo Cerroni
BACKGROUND: Hemophagocytosis is well known in cytotoxic cutaneous T-cell lymphomas (CTCLs), in which it may represent a sign of hemophagocytic lymphohistiocytosis syndrome (HLHS), and is also typical of cutaneous Rosai-Dorfman disease (cRDD) (without prognostic relevance). Only rarely, has cutaneous hemophagocytosis (CH) been described in other skin conditions. OBJECTIVE: To characterize the clinicopathologic features of CH in skin biopsy specimens from patients with conditions other than CTCL or cRDD...
February 2018: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29306246/hyperbolic-relation-between-beta-cell-function-and-insulin-sensitivity-for-type-2-diabetes-mellitus-malaria-influenza-helicobacter-pylori-chlamydia-pneumoniae-and-hepatitis-c-virus-infection-induced-inflammation-oxidative-stress-and-temporary-insulin-resistance
#3
Jean Bosco Kasiam Lasi On'kin, Benjamin Longo-Mbenza, Venant Tchokonte-Nana, Augustin Nge Okwe, Nelly Kangola Kabangu
Background/aim: We calculated the homeostatic model assessment (HOMA) for estimating insulin sensitivity and beta-cell function in normal, healthy nondiabetics with infections (malaria, influenza, HIV, Helicobacter pylori, Chlamydia pneumoniae, and hepatitis C virus), type 2 diabetic black patients, and healthy controls from Kinshasa, DR Congo. Materials and methods: A case-control study was carried out between 2006 and 2007 for black Central African participants managed for HOMA.Results: In total, 219 patients and 110 healthy controls were matched for sex and age...
December 19, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29296274/the-role-of-zoonotic-chlamydial-agents-in-ruminants-abortion
#4
Sara Barati, Naghmeh Moori-Bakhtiari, Masoud Ghorbanpoor Najafabadi, Hassan Momtaz, Leili Shokuhizadeh
Background and Objectives: Enzootic abortion of ewes (EAE) is caused by infection of sheep and goats by Chlamydia abortus bacterium. Chlamydial abortion in bovine could occur by Chlamydia abortus, Chlamydia psittaci and Chlamydia pecorum. C. psittaci is the causative agent of psittacosis or ornithosis disease in humans and birds. It also causes acute pneumonia in cattle and sheep. The present study aimed at surveying the role of chlamydial agents in ruminants abortion. Materials and Methods: A total of 117 aborted material samples (Cotyledon, liver, spleen, and abomasal contents of fetus) from 9 cattle and 100 sheep in Shahr-e-Kord and 8 sheep from Bagh-e-Malek were collected from different herds with abortion history during the lambing periods from 2014 to 2016...
October 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29259924/growth-of-chlamydia-pneumoniae-is-enhanced-in-cells-with-impaired-mitochondrial-function
#5
Nadja Käding, Inga Kaufhold, Constanze Müller, Marta Szaszák, Kensuke Shima, Thomas Weinmaier, Rodrigo Lomas, Ana Conesa, Philippe Schmitt-Kopplin, Thomas Rattei, Jan Rupp
Effective growth and replication of obligate intracellular pathogens depend on host cell metabolism. How this is connected to host cell mitochondrial function has not been studied so far. Recent studies suggest that growth of intracellular bacteria such as Chlamydia pneumoniae is enhanced in a low oxygen environment, arguing for a particular mechanistic role of the mitochondrial respiration in controlling intracellular progeny. Metabolic changes in C. pneumoniae infected epithelial cells were analyzed under normoxic (O2 ≈ 20%) and hypoxic conditions (O2 < 3%)...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29229084/serological-study-of-bordetella-pertussis-mycoplasma-pneumonia-and-chlamydia-pneumonia-in-iranian-hajj-pilgrims-with-prolonged-cough-illnesses-a-follow-up-study
#6
Masoud Rahimian, Mahdi HosseiniB
INTRODUCTION: Hajj pilgrimage is the biggest and longest mass gathering in the Muslim world. Annually, about 50% of more than 2.5 million pilgrims participating in this ritual get involved in severe devastating coughs. Most coughs continue, so the pilgrims turn back home and transmit them to family members and other people. Despite the high prevalence of coughs for many years, what causes them remains unknown. Considering the pertussis-like clinical picture of the so-called "hajj coughs", the researchers conducted a study to measure antibodies against three known common atypical bacteria, namely Bordetella Pertussis, Chlamydia Pneumonia and Mycoplasma Pneumonia...
November 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29212701/multicenter-evaluation-of-the-eplex%C3%A2-respiratory-pathogen-panel-for-the-detection-of-viral-and-bacterial-respiratory-tract-pathogens-in-nasopharyngeal-swabs
#7
N Esther Babady, Matthew R England, Kristen L Jurcic Smith, Taojun He, Dona Saumya Wijetunge, Yi-Wei Tang, Robin R Chamberland, Marilyn Menegus, Ella M Swierkosz, Robert C Jerris, Wallace Greene
Background: The performance of the new ePlex® Respiratory Pathogen (RP) Panel (GenMark Diagnostics) for the simultaneous detection of 19 viruses (influenza A, influenza A H1, influenza A 2009 H1, influenza A H3, influenza B, adenovirus, coronaviruses [HKU1, OC43, NL63, 229E], human rhinovirus/enterovirus, human metapneumovirus, parainfluenza viruses 1, 2, 3 and 4, respiratory syncytial virus (RSV) [RSVA and RSV B]) and two bacteria (Mycoplasma pneumoniae and Chlamydia pneumoniae) was evaluated.Methods: Prospectively and retrospectively collected nasopharyngeal swab (NPS) specimens (n =2,908) were evaluated using the ePlex RP Panel with the bioMérieux/BioFire FilmArray® Respiratory Panel (BF RP) as the comparator method...
December 6, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/29212448/from-genomes-to-genotypes-molecular-epidemiological-analysis-of-chlamydia-gallinacea-reveals-a-high-level-of-genetic-diversity-for-this-newly-emerging-chlamydial-pathogen
#8
Weina Guo, Martina Jelocnik, Jing Li, Konrad Sachse, Adam Polkinghorne, Yvonne Pannekoek, Bernhard Kaltenboeck, Jiansen Gong, Jinfeng You, Chengming Wang
BACKGROUND: Chlamydia (C.) gallinacea is a recently identified bacterium that mainly infects domestic chickens. Demonstration of C. gallinacea in human atypical pneumonia suggests its zoonotic potential. Its prevalence in chickens exceeds that of C. psittaci, but genetic and genomic research on C. gallinacea is still at the beginning. In this study, we conducted whole-genome sequencing of C. gallinacea strain JX-1 isolated from an asymptomatic chicken, and comparative genomic analysis between C...
December 6, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29208015/molecular-etiological-profile-of-atypical-bacterial-pathogens-viruses-and-coinfections-among-infants-and-children-with-community-acquired-pneumonia-admitted-to-a-national-hospital-in-lima-peru
#9
Juana Del Valle-Mendoza, Wilmer Silva-Caso, Angela Cornejo-Tapia, Fiorella Orellana-Peralta, Eduardo Verne, Claudia Ugarte, Miguel Angel Aguilar-Luis, María Del Carmen De Lama-Odría, Ronald Nazario-Fuertes, Mónica Esquivel-Vizcarra, Verónica Casabona-Ore, Pablo Weilg, Luis J Del Valle
OBJECTIVE: The main objective of this study was to detect the presence of 14 respiratory viruses and atypical bacteria (Mycoplasma pneumoniae, Chlamydia pneumoniae), via polymerase chain reaction in patients under 18 years old hospitalized due to community-acquired pneumonia (CAP) from Lima, Peru. RESULTS: Atypical pathogens were detected in 40% (58/146); viral etiologies in 36% (52/146) and coinfections in 19% (27/146). The most common etiological agent was M...
December 6, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29132924/impact-of-capsaicin-an-active-component-of-chili-pepper-on-pathogenic-chlamydial-growth-chlamydia-trachomatis-and-chlamydia-pneumoniae-in-immortal-human-epithelial-hela-cells
#10
Kazuya Yamakawa, Junji Matsuo, Torahiko Okubo, Shinji Nakamura, Hiroyuki Yamaguchi
Chlamydia trachomatis is the leading cause of sexually transmitted infections worldwide. Capsaicin, a component of chili pepper, which can stimulate actin remodeling via capsaicin receptor TRPV1 (transient receptor potential vanilloid 1) and anti-inflammatory effects via PPARγ (peroxisome proliferator-activated receptor-γ) and LXRα (liver X receptor α), is a potential candidate to control chlamydial growth in host cells. We examined whether capsaicin could inhibit C. trachomatis growth in immortal human epithelial HeLa cells...
November 10, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29108997/chlamydia-pneumoniae-exploits-adipocyte-lipid-chaperone-fabp4-to-facilitate-fat-mobilization-and-intracellular-growth-in-murine-adipocytes
#11
Nirwana Fitriani Walenna, Yusuke Kurihara, Bin Chou, Kazunari Ishii, Toshinori Soejima, Ryota Itoh, Akinori Shimizu, Takeshi Ichinohe, Kenji Hiromatsu
Fatty acid-binding protein 4 (FABP4), a cytosolic lipid chaperone predominantly expressed in adipocytes and macrophages, modulates lipid fluxes, trafficking, signaling, and metabolism. Recent studies have demonstrated that FABP4 regulates metabolic and inflammatory pathways, and in mouse models its inhibition can improve type 2 diabetes mellitus and atherosclerosis. However, the role of FABP4 in bacterial infection, metabolic crosstalk between host and pathogen, and bacterial pathogenesis have not been studied...
November 3, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29097818/dapsone-treatment-is-efficient-against-persistent-cutaneous-and-gastrointestinal-symptoms-in-children-with-henoch-sch%C3%A3-nlein-purpura
#12
Jana Volejnikova, Jaroslav Horacek, Frantisek Kopriva
BACKGROUND: Henoch-Schönlein purpura (HSP) is a systemic disorder characterized by leukocytoclastic vasculitis involving the capillaries and by the deposition of IgA immune complexes. An association between HSP and atypical bacteria is uncommon in children. METHODS AND RESULTS: Here we report three cases of children, aged 5, 4 and 16 years, who were diagnosed with HSP associated with Mycoplasma pneumoniae or Chlamydia pneumoniae infection. In all presented cases, persistent cutaneous manifestations and abdominal pain were resistant to antibiotics and corticosteroids, but resolved during 48 h after the introduction of dapsone...
November 2, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/29070907/co-infection-of-chlamydia-psittaci-with-h9n2-ort-and-aspergillus-fumigatus-contributes-to-severe-pneumonia-and-high-mortality-in-spf-chickens
#13
Jun Chu, Qiang Zhang, Zonghui Zuo, Saeed El-Ashram, Yongxia Guo, Peng Zhao, Shujian Huang, Cheng He, Ahrar Khan
Since 2007, most areas of China have seen outbreaks of poultry airsacculitis, which causes hugely economic losses to the poultry industry. However, there are no effective measures to combat the problem. In this study, 105 rations were collected to isolate Aspergillus spp. from the diseased farms. In subsequent experiments, SPF chickens were inoculated with Ornithobacterium rhinotracheale (ORT), Chlamydia psittaci (C. psittaci) and Aspergillus fumigatus (A. fumigatus), and mortality rate, body weight gain and lesion score were evaluated...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29069917/the-association-between-serological-features-of-chronic-chlamydia-pneumoniae-infection-and-markers-of-systemic-inflammation-and-nutrition-in-copd-patients
#14
Magdalena Paplińska-Goryca, Renata Rubinsztajn, Patrycja Nejman-Gryz, Tadeusz Przybyłowski, Rafał Krenke, Ryszarda Chazan
INTRODUCTION: Chlamydia pneumoniae is an obligatory human pathogen involved in lower and upper airway infections, including pneumonia, bronchitis. Asymptomatic C. pneumoniae carriage is also relatively common. The association of C. pneumoniae infections with the chronic obstructive pulmonary disease (COPD) course is unclear. OBJECTIVES: The aim of the study was to investigate the association between chronic C. pneumoniae infection and clinical features of COPD, markers of inflammation and metabolic dysfunction...
October 25, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29057257/serological-analysis-and-drug-resistance-of-chlamydia-pneumoniae-and-mycoplasma-pneumoniae-in-4500-healthy-subjects-in-shenzhen-china
#15
Dong Du, Shuping Liao, Yan Wu, Yang Jiao, Di Wu, Weiqing Wu, Dapeng Yu
OBJECTIVE: To understand the prevalence and distribution of Chlamydia pneumoniae (CP) and Mycoplasma pneumoniae (MP) in the population and to provide a basis for the prevention and treatment of respiratory tract infection. METHODS: This study included a total of 4500 healthy subjects who were given physical examination in Shenzhen People's Hospital from January to December in 2016. Venous blood was drawn from people to detect the MP- and CP-specific IgG and IgM in the serum using chemiluminescence immunoassay (CLIA)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29043803/identification-of-privileged-antichlamydial-natural-products-by-a-ligand-based-strategy
#16
Elina Karhu, Janne Isojärvi, Pia Vuorela, Leena Hanski, Adyary Fallarero
The obligate intracellular pathogen Chlamydia pneumoniae remains a difficult target for antimicrobial therapy. Owing to the permeability barrier placed by bacterial and host vacuolar membranes, as well as the propensity of the bacterium for persistent infections, treatment failures are common. Despite the urgent need for new antichlamydial compounds, their discovery is challenged by the technically demanding assay procedures and lack of validated targets. An alternative strategy of using naturally occurring compounds and their derivatives against C...
October 27, 2017: Journal of Natural Products
https://www.readbyqxmd.com/read/29028977/evolving-understanding-of-the-causes-of-pneumonia-in-adults-with-special-attention-to-the-role-of-pneumococcus
#17
Daniel M Musher, Michael S Abers, John G Bartlett
Before 1945, Streptococcus pneumoniae caused more than 90% of cases of pneumonia in adults. After 1950, the proportion of pneumonia caused by pneumococcus began to decline. Pneumococcus has continued to decline; at present, this organism is identified in fewer than fewer10%-15% of cases. This proportion is higher in Europe, a finding likely related to differences in vaccination practices and smoking. Gram-negative bacilli, Staphylococcus aureus, Chlamydia, Mycoplasma, and Legionella are each identified in 2%-5% of patients with pneumonia who require hospitalization...
September 27, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28991723/infections-and-chlamydia-pneumoniae-antibodies-influence-the-functional-outcome-in-thrombolysed-strokes
#18
Domenico Consoli, Simone Vidale, Marco Arnaboldi, Anna Cavallini, Arturo Consoli, Franco Galati, Donata Guidetti, Giuseppe Micieli, Maurizia Rasura, Roberto Sterzi, Danilo Toni, Domenico Inzitari
OBJECTIVE: Thrombolysis is effective in ischemic stroke patients, but some factors influence its benefit. Previous infections could increase the risk of ischemic stroke by an activation of systemic inflammation. We analysed the influence of previous infections and Chlamydia pneumoniae serology on functional outcome in thrombolysed stroke patients. METHODS: Consecutive thrombolysed stroke patients admitted during calendar year 2011 were analysed. Demographics, vascular risk factors, clinical and aetiological data were registered...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28957394/chlamydia-pneumoniae-inclusion-membrane-protein-cpn0147-interacts-with-host-protein-creb3
#19
Xia Zhao, Ping Li, Kang An, Xiaohui Jia, Yongting Cheng, Tianjun Jia
Chlamydiae are Gram-negative obligate intracellular bacteria that cause diseases with significant medical and economic impacts. Like other chlamydial species, Chlamydia pneumoniae possesses a unique developmental cycle, the infectious elementary body gains access to the susceptible host cell, where it transforms into the replicative reticulate body. The cytoplasmic vacuole where Chlamydia pneumoniae replicates is called an inclusion, which is extensively modified by the insertion of chlamydial effectors known as inclusion membrane proteins (Incs)...
2017: PloS One
https://www.readbyqxmd.com/read/28950002/free-living-and-captive-turtles-and-tortoises-as-carriers-of-new-chlamydia-spp
#20
Agata Mitura, Krzysztof Niemczuk, Kinga Zaręba, Magdalena Zając, Karine Laroucau, Monika Szymańska-Czerwińska
A variety of Chlamydia species belonging to the Chlamydiaceae family have been reported in reptilian hosts but scarce data about their occurrence in turtles and tortoises are available. In this study, research was conducted to acquire information on invasive alien species (IAS) of turtles and indigenous turtles and tortoises, living both free and in captivity, as possible reservoirs of Chlamydiaceae. Analysis of specimens (pharyngeal and cloacal swabs and tissues) from 204 turtles and tortoises revealed an overall Chlamydiaceae prevalence of 18...
2017: PloS One
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