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Chlamydia pneumoniae

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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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
https://www.readbyqxmd.com/read/28948060/lycopene-inhibits-propagation-of-chlamydia-infection
#12
Naylia A Zigangirova, Elena Y Morgunova, Elena D Fedina, Natalia V Shevyagina, Tatiana G Borovaya, Vladimir G Zhukhovitsky, Nigel H Kyle, Ivan M Petyaev
Chlamydiaceae is a family of obligate intracellular pathogenic bacteria with similar developmental cycles and cell biology responsible for a wide range of diseases in different hosts including genital and eye inflammatory diseases, arthritis, and inflammatory diseases of the respiratory and cardiovascular systems. In the present paper, we report that lycopene, one of the main dietary carotenoids, which is present in tomato and some other fruits, has a strong inhibitory effect on C. trachomatis and C. pneumoniae infections in alveolar macrophages...
2017: Scientifica
https://www.readbyqxmd.com/read/28946931/chlamydia-psittaci-psittacosis-as-a-cause-of-community-acquired-pneumonia-a-systematic-review-and-meta-analysis
#13
L Hogerwerf, B DE Gier, B Baan, W VAN DER Hoek
Psittacosis is a zoonotic infectious disease caused by the transmission of the bacterium Chlamydia psittaci from birds to humans. Infections in humans mainly present as community-acquired pneumonia (CAP). However, most cases of CAP are treated without diagnostic testing, and the importance of C. psittaci infection as a cause of CAP is therefore unclear. In this meta-analysis of published CAP-aetiological studies, we estimate the proportion of CAP caused by C. psittaci infection. The databases MEDLINE and Embase were systematically searched for relevant studies published from 1986 onwards...
September 26, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28937705/interventions-for-treating-genital-chlamydia-trachomatis-infection-in-pregnancy
#14
REVIEW
Catherine Cluver, Natalia Novikova, David Oa Eriksson, Kevin Bengtsson, Göran K Lingman
BACKGROUND: Genital Chlamydia trachomatis (C.trachomatis) infection may lead to pregnancy complications such as miscarriage, preterm labour, low birthweight, preterm rupture of membranes, increased perinatal mortality, postpartum endometritis, chlamydial conjunctivitis and C.trachomatis pneumonia.This review supersedes a previous review on this topic. OBJECTIVES: To establish the most efficacious and best-tolerated therapy for treatment of genital chlamydial infection in preventing maternal infection and adverse neonatal outcomes...
September 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28913776/interactions-of-antisera-to-different-chlamydia-and-chlamydophila-species-with-the-ribosomal-protein-rps27a-correlate-with-impaired-protein-synthesis-in-a-human-choroid-plexus-papilloma-cell-line
#15
Abdullah Almamy, Christian Schwerk, Horst Schroten, Hiroshi Ishikawa, Abdul Rahman Asif, Bernhard Reuss
Chlamydia trachomatis (CT) and the Chlamydophila species (CS) Chlamydophila pneumoniae (CPn), and Chlamydophila psittaci (CPs) are suggested to induce autoantibodies causative of several human autoimmune disorders like rheumatoid arthritis and systemic lupus erythematosus (SLE). The aim of the present study was therefore to identify cellular protein interaction partners with antisera to CT (α-CT) or CS (α-CS) and to identify functional consequences of such interaction in vitro. As detected with a commercial first trimester human prenatal brain multiprotein array (hEXselect, Engine, Germany), the most frequent interaction partner with both α-CT and α-CS was the ribosomal small subunit protein RPS27a...
September 14, 2017: Immunologic Research
https://www.readbyqxmd.com/read/28903431/detection-of-specific-chlamydia-pneumoniae-and-cytomegalovirus-antigens-in-human-carotid-atherosclerotic-plaque-in-a-chinese-population
#16
Jiachao Cao, Yumin Mao, Bo Dong, Wei Guan, Jia Shi, Suinuan Wang
To explore the relationship between certain pathogens, such as chlamydia pneumonia (Cpn) and cytomegalovirus (CMV), and carotid atherosclerosis (AS) in a Chinese population.Twenty-five carotid atherosclerotic stenosis patients from the Beijing Tiantan Hospital (affiliated with Capital Medical University) participated in the study. After undergoing digital subtraction angiography (DSA) and/or computed tomography angiography (CTA), the degree of carotid artery stenosis was over 70% in all cases, and the patients underwent carotid endarterectomy...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28900526/lung-us-features-of-severe-interstitial-pneumonia-case-report-and-review-of-the-literature
#17
Tiziano Perrone, Federica Quaglia
BACKGROUND: Chlamydia pneumonia is reported to account for a relatively large number of cases of CAP. In elderly patients in particular, the clinical presentation can be a severe form of diffuse interstitial pneumonia. The chest X-ray presentation is aspecific. Lung US can show a typical pattern of diffuse interstitial lung syndrome; in some cases, like the present one, the association of multiple B lines with a coarse and thickened pleural line points to a more likely diagnosis of interstitial pneumonia...
September 2017: Journal of Ultrasound
https://www.readbyqxmd.com/read/28899468/-pathogen-distribution-and-bacterial-resistance-in-children-with-severe-community-acquired-pneumonia
#18
Yun-Yun Lu, Rong Luo, Zhou Fu
OBJECTIVE: To investigate the distribution of pathogens and bacterial resistance in children with severe community-acquired pneumonia (CAP). METHODS: A total of 522 children with severe CAP who were hospitalized in 2016 were enrolled as study subjects. According to their age, they were divided into infant group (402 infants aged 28 days to 1 year), young children group (73 children aged 1 to 3 years), preschool children group (35 children aged 3 to 6 years), and school-aged children group (12 children aged ≥6 years)...
September 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28891690/compendium-of-measures-to-control-chlamydia-psittaci-infection-among-humans-psittacosis-and-pet-birds-avian-chlamydiosis-2017
#19
Gary Balsamo, Angela M Maxted, Joanne W Midla, Julia M Murphy, Ron Wohrle, Thomas M Edling, Pilar H Fish, Keven Flammer, Denise Hyde, Preeta K Kutty, Miwako Kobayashi, Bettina Helm, Brit Oiulfstad, Branson W Ritchie, Mary Grace Stobierski, Karen Ehnert, Thomas N Tully
Psittacosis, also known as parrot fever and ornithosis, is a bacterial infection that can cause severe pneumonia and other serious health problems in humans. It is caused by Chlamydia psittaci. Reclassification of the order Chlamydiales in 1999 into 2 genera (Chlamydia and Chlamydophila) was not wholly accepted or adopted. This resulted in a reversion to the single, original genus Chlamydia, which now encompasses all 9 species including Chlamydia psittaci. During 2003-2014, 112 human cases of psittacosis were reported to the Centers for Disease Control and Prevention through the Nationally Notifiable Diseases Surveillance System...
September 2017: Journal of Avian Medicine and Surgery
https://www.readbyqxmd.com/read/28879822/the-impact-of-pathogen-burden-on-leukocyte-telomere-length-in-the-multi-ethnic-study-of-atherosclerosis
#20
A E Aiello, B Jayabalasingham, A M Simanek, A Diez-Roux, L Feinstein, H C S Meier, B L Needham, J B Dowd
Several infections have been linked to telomere shortening and in some cases these associations have varied by sex. We assessed the association between seropositivity to four persistent pathogens (cytomegalovirus (CMV), herpes simplex virus-1, Helicobacter pylori, Chlamydia pneumoniae), and total pathogen burden on leukocyte telomere length in a diverse US sample. Data came from the Multi-Ethnic Study of Atherosclerosis, a population-based cohort study. We utilized cross-sectional survey data, and biological samples from participants tested for pathogens and telomere length (N = 163)...
October 2017: Epidemiology and Infection
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