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mycoplasma pneumoniae

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https://www.readbyqxmd.com/read/28107399/changes-in-molecular-characteristics-of-mycoplasma-pneumoniae-in-clinical-specimens-from-children-in-beijing-between-2003-and-2015
#1
Hongmei Sun, Guanhua Xue, Chao Yan, Shaoli Li, Hanqing Zhao, Yanling Feng, Liqiong Wang
The molecular characteristics of 480 Mycoplasma pneumoniae polymerase chain reaction-positive specimens (331 were previously reported and 149 were newly reported) collected from pediatric patients in Beijing, China, between 2003 and 2015 were analyzed. Genotype M4-5-7-2/P1 were the most prevalent across the 13-year study period, although the isolation and mutation rates for this genotype varied between the periods 2003-2007, 2008-2013, and 2014-2015. In addition, there was a close association between the M4-5-7-2 genotype and macrolide resistance...
2017: PloS One
https://www.readbyqxmd.com/read/28095890/impact-of-diversity-of-mycoplasma-hyopneumoniae-strains-on-lung-lesions-in-slaughter-pigs
#2
Annelies Michiels, Katleen Vranckx, Sofie Piepers, Rubén Del Pozo Sacristán, Ioannis Arsenakis, Filip Boyen, Freddy Haesebrouck, Dominiek Maes
The importance of diversity of Mycoplasma hyopneumoniae (M. hyopneumoniae) strains is not yet fully known. This study investigated the genetic diversity of M. hyopneumoniae strains in ten pig herds, and assessed associations between the presence of different strains of M. hyopneumoniae and lung lesions at slaughter. Within each herd, three batches of slaughter pigs were investigated. At slaughter, from each batch, 20 post mortem bronchoalveolar lavage fluid samples were collected for multiple locus variable-number tandem repeat analysis (MLVA), and lung lesions (Mycoplasma-like lesions, fissures) were examined...
January 17, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28074049/in-vitro-antibacterial-activity-of-%C3%AE-methoxyimino-acylide-derivatives-against-macrolide-resistant-pathogens-and-mutation-analysis-in-23s-rrna
#3
Hiroyuki Sugiyama, Ippei Yoshida, Mayumi Ueki, Katsuhiko Tanabe, Akira Manaka, Keiichi Hiramatsu
We characterized in vitro activities of α-methoxyimino acylides against macrolide-resistant clinical isolates of Streptococcus pneumoniae, Streptococcus pyogenes and Mycoplasma pneumoniae with ribosome modification or substitution and selected acylide-resistant mutants to clarify the binding point of the acylides. The acylides had low MICs against erm(B) gene-containing S. pneumoniae and S. pyogenes (MIC90s, 1-4 μg ml(-1)). For M. pneumoniae, although they had poor potencies against macrolide-resistant strains with the A2058G (Escherichia coli numbering) mutation in 23S rRNA (MICs, >32 μg ml(-1)), one of them showed in vitro activities against macrolide-resistant strains with the A2058U or A2059G mutations (MICs, 0...
January 11, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28073091/the-effect-of-platycodin-d-on-the-expression-of-cytoadherence-proteins-p1-and-p30-in-mycoplasma-pneumoniae-models
#4
Yan-Li Meng, Wei-Ming Wang, Dan-Dan Lv, Qiu-Xia An, Wei-Hong Lu, Xin Wang, Guixin Tang
Platycodin D is one of the most important monomers of the Qinbaiqingfei pellet (Qinbai), which has already been approved as the first effective new Traditional Chinese Medicine used to fight against Mycoplasma pneumoniae (M. pneumoniae) in clinic in China. In previous studies, pharmacodynamics experiment has proved that Platycodin D has anti-M. pneumoniae effect and the minimum inhibitory concentration (MIC) is 16mμg/ml. This paper further clarified that the mechanism underlying the anti-M. pneumoniae effect of Platycodin D might be due to M...
January 3, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28062246/prevalence-of-chlamydophila-pneumoniae-and-mycoplasma-pneumoniae-igm-and-igg-antibodies-in-tunisian-patients-presenting-with-exacerbation-of-chronic-obstructive-pulmonary-disease
#5
S Messous, I Trabelsi, M H Grissa, S Nouira, B Pozzetto, M Mastouri
OBJECTIVE: We aimed to assess the prevalence of Chlamydophila pneumoniae and Mycoplasma pneumoniae acute infections, using serological testing, in patients admitted to the emergency department for acute exacerbations of chronic obstructive pulmonary disease (COPD). METHODS: We performed a prospective observational study of 100 consecutive patients. Serum specimens were collected at day 0 and day 15. C. pneumoniae and M. pneumoniae antibodies (IgM and IgG) were tested by commercial ELISA and immunofluorescence assay, respectively...
January 3, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28061998/effects-of-mycoplasma-hyopneumoniae-on-porcine-nasal-cavity-dendritic-cells
#6
Yumeng Shen, Weiwei Hu, Yanna Wei, Zhixin Feng, Qian Yang
Mycoplasma hyopneumoniae (Mhp) is the primary etiological agent responsible for swine enzootic pneumonia (EP), a disease that cause tremendous economic losses all over the swine industry. Dendritic cells (DCs), the most effective antigen-presenting cells, are widely distributed beneath respiratory epithelium. DCs uptake and present antigens to T cells, to initiate protective immune responses or generate immune-mediated pathology in different infections. In this study, we investigated the changes in the different DCs subpopulations, T cells and SIgA positive cells counts in porcine nasal cavity after long time Mhp infection...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28060039/epidemiology-and-molecular-characteristics-of-mycoplasma-pneumoniae-during-an-outbreak-of-m-pneumoniae-associated-stevens-johnson-syndrome
#7
Louise K Francois Watkins, Daniel Olson, Maureen H Diaz, Xia Lin, Alicia Demirjian, Alvaro J Benitez, Jonas M Winchell, Christine C Robinson, Kirk A Bol, Mary P Glodé, Samuel R Dominguez, Lisa A Miller, Preeta K Kutty
BACKGROUND: An increase in Mycoplasma pneumoniae-associated Stevens-Johnson syndrome (SJS) cases at a Colorado pediatric hospital led to an outbreak investigation. We describe the epidemiologic and molecular characteristics of M. pneumoniae among SJS case-patients and surrounding community members during the outbreak. METHODS: M. pneumoniae PCR-positive respiratory specimens from 5 Colorado hospitals and 4 referral laboratories underwent confirmatory PCR testing; positive specimens then underwent multilocus variable-number tandem-repeat analysis (MLVA) and macrolide resistance testing...
January 3, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28057814/increased-serum-interleukin-10-but-not-interleukin-4-level-in-children-with-mycoplasma-pneumoniae-pneumonia
#8
Biljana Medjo, Marina Atanaskovic-Markovic, Dimitrije Nikolic, Snezana Radic, Ivana Lazarevic, Ivana Cirkovic, Slobodanka Djukic
BACKGROUND: Mycoplasma pneumoniae (MP) is a common cause of community-acquired pneumonia in children, and it has been associated with wheezing. The aim of this study was to examine the serum level of interleukin (IL)-4 and IL-10 in children with Mycoplasma pneumoniae pneumonia (MPP) and to analyse them in relation to the presence of wheezing. METHODS: The study included 166 children with radiologically confirmed pneumonia. MP infection was confirmed by enzyme-linked immunosorbent assay (ELISA) serum MP-IgM and MP-IgG test and throat swab MP DNA with real-time polymerase chain reaction...
January 5, 2017: Journal of Tropical Pediatrics
https://www.readbyqxmd.com/read/28051240/clinical-effect-of-treating-secondary-asthma-attacks-of-children-mycoplasma-pneumoniae-with-combined-therapy-of-montelukast-and-azithromycin
#9
L Gong, L Xu, M Diao, F Guo, F-F Bian, J Min, R Liu, C-L Zhang
OBJECTIVE: To discuss the clinical effects of treating secondary asthma attacks of children Mycoplasma pneumoniae with combined therapy of montelukast and azithromycin. PATIENTS AND METHODS: 96 children patients diagnosed with secondary asthma attacks of Mycoplasma pneumonia were enrolled in this study. They were randomly divided into two groups: the control group (n=49) and the observation group (n=47). Patients in the control group received combined therapy using azithromycin and bronchodilators or glucocorticoid, and patients in the observation group received a combined therapy of montelukast, azithromycin and bronchodilators or glucocorticoid...
December 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28049398/infectious-agents-and-neurodegenerative-diseases-exploring-the-links
#10
Mohammad Zubair Alam, Qamre Alam, Mohammad Amjad Kamal, Asif Ahmad Jiman-Fatani, Esam I Azhar, Mohammad Azhar Khan, Absarul Haque
Recent studies have shown that bacterial and viral infections are risk factors for various neurodegenerative diseases such as Amyotrophic lateral sclerosis (ALS), Multiple Sclerosis (MS), Alzheimer's disease (AD), and Lyme disease (LD). However, it is still controversial how the infections play a role in neurological diseases progression. Infections in central nervous system may lead multiple damages in infected and neighboring cells. The infection leads to the activation of inflammatory processes and host immune responses, which acts as defense mechanism and also causes damage to the host neuronal functions and viability...
January 3, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28025664/characterization-of-the-neurological-diseases-associated-with-mycoplasma-pneumoniae-infection-and-anti-glycolipid-antibodies
#11
Motoi Kuwahara, Makoto Samukawa, Tae Ikeda, Miyuki Morikawa, Rino Ueno, Yukihiro Hamada, Susumu Kusunoki
Mycoplasma pneumoniae infection often causes various neurological complications of both the central nervous system (CNS) and the peripheral nervous system. We retrospectively investigated the IgM and IgG antibodies to nine glycolipids [GM1, GM2, GM3, GD1a, GD1b, GD3, GT1b, GQ1b, and Gal-C (galactocerebroside)] and clinical features in neurological diseases associated with M. pneumoniae infection diagnosed in multiple hospitals throughout Japan between September 2010 and March 2012. Of the 46 patients with neurological diseases associated with M...
December 26, 2016: Journal of Neurology
https://www.readbyqxmd.com/read/28018301/screening-and-identification-of-apoc1-as-a-novel-potential-biomarker-for-differentiate-of-mycoplasma-pneumoniae-in-children
#12
Jieqiong Li, Lin Sun, Fang Xu, Hui Qi, Chen Shen, Weiwei Jiao, Jing Xiao, Qinjing Li, Baoping Xu, Adong Shen
Background: Although Mycoplasma pneumoniae (MP) is a common cause of community-acquired pneumonia (CAP) in children, the currently used diagnostic methods are not optimal. Proteomics is increasingly being used to study the biomarkers of infectious diseases. Methods: Label-free quantitative proteomics and liquid chromatography-mass/mass spectrometry were used to analyze the fold change of protein expression in plasma of children with MP pneumonia (MPP), infectious disease control (IDC), and healthy control (HC) groups...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28008989/the-clinical-characteristics-of-corticosteroid-resistant-refractory-mycoplasma-pneumoniae-pneumonia-in-children
#13
Yongdong Yan, Yuzhen Wei, Wujun Jiang, Chuangli Hao
To analyze the clinical characteristics of corticosteroid-resistant refractory Mycoplasma pneumoniae pneumonia (RMPP) and explore the related factors that predict corticosteroid-resistant RMPP. Retrospective analysis of 183 children with RMPP in our hospital admitted between January 1, 2012, and December 31, 2014 was performed. Of the 183 RMPP cases, 36 (19.7%) were corticosteroid-resistant RMPP cases. Corticosteroid-resistant RMPP cases had a longer duration of fever and hospitalization compared with corticosteroid-sensitive RMPP cases (P < 0...
December 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/28003598/an-itraq-based-quantitative-proteomics-study-of-refractory-mycoplasma-pneumoniae-pneumonia-patients
#14
Jia-Lu Yu, Qi-Fang Song, Zhi-Wei Xie, Wen-Hui Jiang, Jia-Hui Chen, Hui-Feng Fan, Ya-Ping Xie, Gen Lu
Mycoplasma pneumoniae(MP) is a leading cause of community-acquired pneumonia in children and young adults. Although MP pneumonia is usually benign and self-limited, in some cases it can develop into a life-threating refractory MP pneumonia(RMPP). However, the pathogenesis of RMPP is poorly understood. The identification and characterization of proteins related to RMPP could provide "proof of principle" to facilitate appropriate diagnostic and therapeutic strategies for MP patients. In this study, we applied the quantitative proteomic technique(iTRAQ) to globally analyze MP-related proteins in serum samples from five RMPP and five non-refractory MP pneumonia(NRMPP) patients, and five healthy children...
December 22, 2016: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28003119/secretomes-of-mycoplasma-hyopneumoniae-and-mycoplasma-flocculare-reveal-differences-associated-to-pathogenesis
#15
Jéssica A Paes, Karina R Lorenzatto, Sofia N de Moraes, Hercules Moura, John R Barr, Henrique B Ferreira
: Mycoplasma hyopneumoniae and Mycoplasma flocculare cohabit the porcine respiratory tract. However, M. hyopneumoniae causes the porcine enzootic pneumonia, while M. flocculare is a commensal bacterium. Comparative analyses demonstrated high similarity between these species, which includes the sharing of all predicted virulence factors. Nevertheless, studies related to soluble secretomes of mycoplasmas were little known, although they are important for bacterial-host interactions. The aim of this study was to perform a comparative analysis between the soluble secreted proteins repertoires of the pathogenic Mycoplasma hyopneumoniae and its closely related commensal Mycoplasma flocculare...
December 18, 2016: Journal of Proteomics
https://www.readbyqxmd.com/read/27974118/-risk-factors-for-recurrent-wheezing-in-infants-and-young-children-suffering-from-dust-mite-allergy-after-their-first-wheezing
#16
Yan-Zhen Yang, Meng-Yun Cai, Bao-Zhong Zhang, Bing-Xin Zhou, Rou Chen, Run-Tao Fang
OBJECTIVE: To investigate the risk factors for recurrent wheezing in infants and young children suffering from dust mite allergy after their first wheezing. METHODS: A total of 1 236 infants and young children who experienced a first wheezing episode and were hospitalized between August 2014 and February 2015 were enrolled, among whom 387 were allergic to dust mites. These infants and young children were followed up to 1 year after discharge. A total of 67 infants and young children who experienced 3 or more recurrent wheezing episodes within 1 year were enrolled as the recurrent wheezing group, while 84 infants and young children who did not experience recurrent wheezing during follow-up were enrolled as the control group...
December 2016: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/27974117/-association-of-t-lymphocyte-subsets-and-allergens-with-mycoplasma-pneumoniae-infection-complicated-by-wheezing-in-infants-and-young-children
#17
Lin Ding, Wei Ji, Hui-Ming Sun, Wu-Jun Jiang, Wen-Jing Gu, Yong-Dong Yan, Xue-Jun Shao
OBJECTIVE: To investigate the percentage of T lymphocyte subsets and allergen screening results in infants and young children with Mycoplasma pneumoniae (MP) infection complicated by wheezing. METHODS: Flow cytometry was used to measure the percentage of peripheral blood T cell subsets in 354 infants and young children with MP infection complicated by wheezing (MP wheezing group), 336 infants and young children with MP infection but without wheezing (MP non-wheezing group), and 277 children with recurrent wheezing (recurrent wheezing group)...
December 2016: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/27960208/community-acquired-pneumonia-in-the-asia-pacific-region
#18
Jae-Hoon Song, Kyungmin Huh, Doo Ryeon Chung
Community-acquired pneumonia (CAP) is an important cause of mortality and morbidity worldwide. Aging population, dense urbanization, and poor access to health care make the Asia-Pacific region vulnerable to CAP. The high incidence of CAP poses a significant health and economic burden in this region. Common etiologic agents in other global regions including Streptococcus pneumoniae, Mycoplasma pneumoniae, Haemophilus influenzae, Chlamydophila pneumoniae, Staphylococcus aureus, and respiratory viruses are also the most prevalent pathogens in the Asia-Pacific region...
December 2016: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/27960206/role-of-atypical-pathogens-in-the-etiology-of-community-acquired-pneumonia
#19
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/27956836/relationships-between-th1-th2-cytokine-profiles-and-chest-radiographic-manifestations-in-childhood-mycoplasma-pneumoniae-pneumonia
#20
Jiu-Ling Zhao, Xin Wang, Yu-Shui Wang
BACKGROUND: Mycoplasma pneumoniae pneumonia (MPP) is one of the most common childhood community-acquired pneumonias, and the chest radiograph usually shows bronchial pneumonia, segmental/lobar pneumonia, or segmental/lobar pneumonia with pleural effusion. The imbalance of Th1/Th2 function after Mycoplasma pneumoniae infection is an important immunological mechanism of MPP. In this study, we aimed to evaluate the correlations between Th1/Th2 cytokine profiles and chest radiographic manifestations in MPP children...
2016: Therapeutics and Clinical Risk Management
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