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Chlamydia pneumoniae

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https://www.readbyqxmd.com/read/28182619/contribution-of-common-infections-to-cardiovascular-risk-in-hiv-positive-individuals
#1
Victoria Berquist, Jennifer F Hoy, Janine M Trevillyan
HIV-positive individuals are at increased risk for cardiovascular disease due to complex interactions between the increased incidence of traditional cardiovascular risk factors and HIV and antiretroviral-associated inflammation and dyslipidemia. Increasing evidence suggests that a number of important co-pathogens, including cytomegalovirus, hepatitis C virus, and periodontal disease, are likely to also be contributing. Mechanisms such as molecular mimicry and modification of lipids play a role; however, induction of systemic inflammation is the likely key pathogenic link by which this occurs...
February 9, 2017: AIDS Reviews
https://www.readbyqxmd.com/read/28158541/cholesterol-uptake-in-the-mouse-aorta-increases-during-chlamydia-pneumoniae-infection
#2
Marie Edvinsson, Jonas Tallkvist, Christina Nyström-Rosander, Nils-Gunnar Ilbäck
No abstract text is available yet for this article.
February 2, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28129377/high-prevalence-of-mycoplasma-pneumoniae-and-chlamydia-pneumoniae-in-children-with-acute-respiratory-infections-from-lima-peru
#3
Juana Del Valle-Mendoza, Fiorella Orellana-Peralta, Alvaro Marcelo-Rodríguez, Eduardo Verne, Mónica Esquivel-Vizcarra, Wilmer Silva-Caso, Miguel Angel Aguilar-Luis, Pablo Weilg, Verónica Casabona-Oré, Claudia Ugarte, Luis J Del Valle
BACKGROUND: Mycoplasma pneumoniae and Chlamydia pneumoniae are atypical pathogens responsible for pneumonia and a leading cause of morbidity and mortality in low income countries. The study objective is to determine the prevalence of this pathogens in Peruvian children with acute respiratory infections. METHODS: A consecutive cross-sectional study was conducted in Lima, Peru from May 2009 to September 2010. A total of 675 children admitted with clinical diagnoses of acute respiratory infections were tested for Mycoplasma pneumoniae and Chlamydia pneumoniae detection by polymerase chain reaction (PCR), and clinical symptoms were registered by the attending physician...
2017: PloS One
https://www.readbyqxmd.com/read/28120588/the-association-of-chlamydia-pneumonia-and-helicobacter-pylori-igg-seropositivity-with-omentin-1-visfatin-and-adiponectin-levels-in-postmenopausal-women
#4
Reza Ranjbar, Alireza Bolkheir, Katayoun Vahdat, Majid Assadi, Hossein Darabi, Iraj Nabipour
Some adipocytokines are cardioprotective or pro-inflammatory for cardiovascular system. Chronic infection with Chlamydia pneumoniae and Helicobacter pylori has been also considered as novel risk factors for atherosclerosis. The main aim of the current population-based study is to investigate the potential link between circulating adipocytokines and Chlamydia pneumoniae or Helicobacter pylori IgG seropositivities. A total of 250 healthy postmenopausal women who participated in a prospective cohort study were evaluated for IgG antibodies directed against C...
December 2016: Acta Medica Iranica
https://www.readbyqxmd.com/read/28102626/neonatal-apnea-with-chlamydia-pneumoniae-infection
#5
Yuta Sasaoka, Yuko Yoto, Masatoshi Tatsumi, Kazuki Iida, Hiroyuki Tsutsumi
No abstract text is available yet for this article.
January 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28087650/simkania-negevensis-may-produce-long-lasting-infections-in-human-pneumocytes-and-endometrial-cells
#6
Manon Vouga, David Baud, Gilbert Greub
Simkania negevensis is a novel Chlamydia-related bacterium and the founding member of the Simkaniaceae family within the Chlamydiales order. Little is known about the biology and pathogenesis of this bacterium. So far, S. negevensis has been considered as an amoebal symbiont, but its natural host remains unknown. Moreover, evidence of human exposition has been reported worldwide and an association with pneumonia and bronchiolitis is suspected. Here, we evaluated the ability of S. negevensis to replicate in potential environmental reservoirs, namely amoebae and arthropods, as well as in mammalian cells (Vero cells, pneumocytes and endometrial cells) and further evaluated the characteristics of its replicative vacuole...
January 12, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28051279/carotid-intima-media-thickness-and-blood-biomarkers-of-atherosclerosis-in-patients-after-stroke-or-myocardial-infarction
#7
Iwona Kurkowska-Jastrzebska, Michał A Karlinski, Beata Błazejewska-Hyzorek, Iwona Sarzynska-Dlugosz, Krzysztof J Filipiak, Anna Czlonkowska
AIM: To test if circulating levels of markers of inflammation, endothelial function, and chronic infections, as well as association between these markers and carotid intima media thickness (CIMT), depend on the stage of atherosclerosis expressed as a history of a major vascular event. METHODS: The associations were analyzed separately in 75 healthy controls, 79 patients 3-6 months after the first-ever non-cardioembolic ischemic stroke (IS), and 37 patients 3-6 months after the first-ever myocardial infarction (MI)...
December 31, 2016: Croatian Medical Journal
https://www.readbyqxmd.com/read/28035483/chlamydia-pneumoniae-induces-interleukin-12-responses-in-peripheral-blood-mononuclear-cells-in-asthma-and-the-role-of-toll-like-receptor-2-versus-4-a-pilot-study
#8
T A Smith-Norowitz, J Perlman, Y M Norowitz, R Joks, H G Durkin, M R Hammerschlag, S Kohlhoff
BACKGROUND: Chlamydia pneumoniae causes respiratory infection in adults and children, and has been associated with asthma exacerbations and induction of Immunoglobulin (Ig) E responses. We previously reported that C. pneumoniae enhances T helper (Th) 2 responses of peripheral blood mononuclear cells (PBMC) from asthmatic patients. It is likely that toll like receptor (TLR)-2 and TLR-4 mediate cytokine responses and host defense against C. pneumoniae. Thus, we sought to determine whether engagement of TLR-2 or TLR-4 may induce IL-12 production in our C...
December 29, 2016: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28032346/mannose-binding-lectin-and-l-ficolin-polymorphisms-in-patients-with-community-acquired-pneumonia-caused-by-intracellular-pathogens
#9
Gijs van Kempen, Sabine Meijvis, Hendrik Endeman, Bart Vlaminckx, Bob Meek, Ben de Jong, Ger T Rijkers, Willem Jan Bos
Community acquired pneumonia (CAP) is the leading infectious disease requiring hospitalisation in the Western World. Genetic variability affecting the host response to infection may play a role in susceptibility and outcome in CAP patients. Mannose binding lectin (MBL) and L-ficolin (L-FCN) are two important activators of the complement system and they can enhance phagocytosis by opsonisation. In a prospective cohort of 505 Dutch CAP patients and 227 controls we studied whether polymorphisms in the MBL (MBL2) and FCN (FCN2) genes influenced susceptibility and outcome...
December 29, 2016: Immunology
https://www.readbyqxmd.com/read/27978822/acanthamoeba-containing-endosymbiotic-chlamydia-isolated-from-hospital-environments-and-its-potential-role-in-inflammatory-exacerbation
#10
Tatsuya Fukumoto, Junji Matsuo, Torahiko Okubo, Shinji Nakamura, Kentaro Miyamoto, Kentaro Oka, Motomichi Takahashi, Kouji Akizawa, Hitoshi Shibuya, Chikara Shimizu, Hiroyuki Yamaguchi
BACKGROUND: Environmental chlamydiae belonging to the Parachlamydiaceae are obligate intracellular bacteria that infect Acanthamoeba, a free-living amoeba, and are a risk for hospital-acquired pneumonia. However, whether amoebae harboring environmental chlamydiae actually survive in hospital environments is unknown. We therefore isolated living amoebae with symbiotic chlamydiae from hospital environments. RESULTS: One hundred smear samples were collected from Hokkaido University Hospital, Sapporo, Japan; 50 in winter (February to March, 2012) and 50 in summer (August, 2012), and used for the study...
December 15, 2016: BMC Microbiology
https://www.readbyqxmd.com/read/27960206/role-of-atypical-pathogens-in-the-etiology-of-community-acquired-pneumonia
#11
Forest W Arnold, James T Summersgill, Julio A Ramirez
Atypical pneumonia has been described for over 100 years, but some of the pathogens attributed to it have been identified only in the past decades. The most common pathogens are Chlamydia pneumoniae, Mycoplasma pneumoniae, and Legionella pneumophila. The epidemiology and pathophysiology of these three pathogens have been studied since their discovery, and are reviewed herein to provide better insight when evaluating these patients, which hopefully translates into improved care. The incidence of atypical pathogens has been shown to be approximately 22% worldwide, but this probably varies with location...
December 2016: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27940015/atypical-chlamydia-psittaci-pneumonia-four-related-cases
#12
Nuria Arenas-Valls, Silvia Chacón, Alfredo Pérez, Roberto Del Pozo
No abstract text is available yet for this article.
December 7, 2016: Archivos de Bronconeumología
https://www.readbyqxmd.com/read/27939160/chlamydial-infections-in-wildlife-conservation-threats-and-or-reservoirs-of-spill-over-infections
#13
REVIEW
Delaney Burnard, Adam Polkinghorne
Members of the order Chlamydiales are biphasic intracellular pathogens known to cause disease in both humans and animals. As we learn more about the genetic diversity of this group of pathogens, evidence is growing that these bacteria infect a broader range of animal hosts than previously thought. Over 400 host species are now documented globally with the majority of these being wild animals. Given the impact of chlamydial infections on humans and domesticated animals, the identification of members of the order Chlamydiales in wildlife raises significant questions over a) their impact on animal health and b) the relationships to those strains also found in humans and domestic animals...
November 30, 2016: Veterinary Microbiology
https://www.readbyqxmd.com/read/27935539/role-of-chlamydia-pneumoniae-in-the-pathogenesis-of-hypertrophy-and-adenoid-tissue-inflammation-in-children
#14
Anna Bielicka, Beata Zielnik-Jurkiewicz, Edyta Podsiadły, Monika Prochorec-Sobieszek, Joanna Rogulska, Urszula Demkow
OBJECTIVE: A tropism to epithelial cells and lymphocytes, an inhibition of apoptosis in host cells, an ability to occurrence in persistent form resistant to antibiotic treatment are the features of Chlamydia pneumoniae, which can have connection with chronic inflammation of an adenoid tissue and adenoid hypertrophy. This study aimed to (1) detect the C. pneumoniae in an adenoid in children undergoing adenoidectomy, (2) estimate a connection between C. pneumoniae occurrence and the size of adenoid, (3) demonstration in which of adenoid cells C...
October 31, 2016: Otolaryngologia Polska. the Polish Otolaryngology
https://www.readbyqxmd.com/read/27916800/lead-discovery-strategies-for-identification-of-chlamydia-pneumoniae-inhibitors
#15
REVIEW
Leena Hanski, Pia Vuorela
Throughout its known history, the gram-negative bacterium Chlamydia pneumoniae has remained a challenging target for antibacterial chemotherapy and drug discovery. Owing to its well-known propensity for persistence and recent reports on antimicrobial resistence within closely related species, new approaches for targeting this ubiquitous human pathogen are urgently needed. In this review, we describe the strategies that have been successfully applied for the identification of nonconventional antichlamydial agents, including target-based and ligand-based virtual screening, ethnopharmacological approach and pharmacophore-based design of antimicrobial peptide-mimicking compounds...
November 28, 2016: Microorganisms
https://www.readbyqxmd.com/read/27894280/is-there-any-association-between-sarcoidosis-and-infectious-agents-a-systematic-review-and-meta-analysis
#16
Tiago Esteves, Gloria Aparicio, Vicente Garcia-Patos
BACKGROUND: During the last few years, investigators have debated the role that infectious agents may have in sarcoidosis pathogenesis. With the emergence of new molecular biology techniques, several studies have been conducted; therefore, we performed a meta-analysis in order to better explain this possible association. METHODS: This review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement from the Cochrane collaboration guidelines...
November 28, 2016: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/27819396/lack-of-association-of-chlamydia-pneumoniae-with-cardiovascular-diseases-in-virologically-suppressed-hiv-patients
#17
Rosa Sessa, Marisa Di Pietro, Simone Filardo, Alessia Bressan, Laura Mazzuti, Sara Serafino, Alessandra Fantauzzi, Ombretta Turriziani
Cardiovascular disease (CVD) is a major public health problem in developed countries with over 17 million deaths per year. In the last decade, several infectious agents rather than any single pathogen, including Chlamydia pneumoniae and human immunodeficiency virus (HIV), have been shown to contribute to the development of atherosclerosis and subsequent cardiovascular events by inducing systemic inflammation and/or acting directly on the vascular wall. For the first time, we evaluated C. pneumonia DNA in peripheral blood mononuclear cells from HIV patients by real-time polymerase chain reaction in order to shed light on C...
November 7, 2016: New Microbiologica
https://www.readbyqxmd.com/read/27817213/progress-and-future-opportunities-in-the-development-of-vaccines-against-atherosclerosis
#18
Dania O Govea-Alonso, Josué Beltrán-López, Jorge A Salazar-González, Juan Vargas-Morales, Sergio Rosales-Mendoza
Atherosclerosis represents a serious global health problem that demands new therapeutic and prophylactic interventions. Considering that atherosclerosis has autoimmune and inflammatory components, immunotherapy is a possible focus to treat this disease. Areas covered: Based on the analysis of the current biomedical literature, this review describes the status on the development of vaccines against atherosclerosis. Several targets have been identified including sequences of apolipoprotein B100 (ApoB100), cholesteryl ester transfer protein (CETP), heat shock proteins (HSP), extracellular matrix proteins, T cell receptor β chain variable region 31 (TRBV31), the major outer membrane protein (MOMP), and the outer membrane protein 5 (Pomp5) from Chlamydia pneumoniae...
November 25, 2016: Expert Review of Vaccines
https://www.readbyqxmd.com/read/27803507/role-of-atypical-bacteria-in-hospitalized-patients-with-nursing-home-acquired-pneumonia
#19
Laura Meyer-Junco
Background: Nursing home-acquired pneumonia (NHAP) has been identified as one of the leading causes of mortality and hospitalization for long-term care residents. However, current and previous pneumonia guidelines differ on the appropriate management of NHAP in hospitalized patients, specifically in regard to the role of atypical bacteria such as Chlamydiae pneumonia, Mycoplasma pneumoniae, and Legionella. Objectives: The purpose of this review is to evaluate clinical trials conducted in hospitalized patients with NHAP to determine the prevalence of atypical bacteria and thus the role for empiric antibiotic coverage of these pathogens in NHAP...
October 2016: Hospital Pharmacy
https://www.readbyqxmd.com/read/27786615/simkania-negevensis-an-insight-into-the-biology-and-clinical-importance-of-a-novel-member-of-the-chlamydiales-order
#20
REVIEW
Manon Vouga, David Baud, Gilbert Greub
Simkania negevensis is a Chlamydia-related bacterium discovered in 1993 and represents the founding member of the Simkaniaceae family within the Chlamydiales order. As other Chlamydiales, it is an obligate intracellular bacterium characterized by a biphasic developmental cycle. Its similarities with the pathogenic Chlamydia trachomatis and Chlamydia pneumoniae make it an interesting bacterium. So far, little is known about its biology, but S. negevensis harbors various microbiological characteristics of interest, including a strong association of the Simkania-containing vacuole with the ER and the presence of an intron in the 23S rRNA encoding gene...
February 2017: Critical Reviews in Microbiology
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