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Emerging Microbes & Infections

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https://www.readbyqxmd.com/read/28790460/role-of-domestic-ducks-in-the-emergence-of-a-new-genotype-of-highly-pathogenic-h5n1-avian-influenza-a-viruses-in-bangladesh
#1
Subrata Barman, Atanaska Marinova-Petkova, M Kamrul Hasan, Sharmin Akhtar, Rabeh El-Shesheny, Jasmine Cm Turner, John Franks, David Walker, Jon Seiler, Kimberly Friedman, Lisa Kercher, Trushar Jeevan, Daniel Darnell, Ghazi Kayali, Lisa Jones-Engel, Pamela McKenzie, Scott Krauss, Richard J Webby, Robert G Webster, Mohammed M Feeroz
Highly pathogenic avian influenza H5N1 viruses were first isolated in Bangladesh in February 2007. Subsequently, clades 2.2.2, 2.3.4.2 and 2.3.2.1a were identified in Bangladesh, and our previous surveillance data revealed that by the end of 2014, the circulating viruses exclusively comprised clade 2.3.2.1a. We recently determined the status of circulating avian influenza viruses in Bangladesh by conducting surveillance of live poultry markets and waterfowl in wetland areas from February 2015 through February 2016...
August 9, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28790459/dengue-burden-in-india-recent-trends-and-importance-of-climatic-parameters
#2
Srinivasa Rao Mutheneni, Andrew P Morse, Cyril Caminade, Suryanaryana Murty Upadhyayula
For the past ten years, the number of dengue cases has gradually increased in India. Dengue is driven by complex interactions among host, vector and virus that are influenced by climatic factors. In the present study, we focused on the extrinsic incubation period (EIP) and its variability in different climatic zones of India. The EIP was calculated by using daily and monthly mean temperatures for the states of Punjab, Haryana, Gujarat, Rajasthan and Kerala. Among the studied states, a faster/low EIP in Kerala (8-15 days at 30...
August 9, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28790458/zika-virus-replication-in-the-mosquito-culex-quinquefasciatus-in-brazil
#3
Duschinka Rd Guedes, Marcelo Hs Paiva, Mariana Ma Donato, Priscilla P Barbosa, Larissa Krokovsky, Sura W Dos S Rocha, Karina LA Saraiva, Mônica M Crespo, Tatiana Mt Rezende, Gabriel L Wallau, Rosângela Mr Barbosa, Cláudia Mf Oliveira, Maria Av Melo-Santos, Lindomar Pena, Marli T Cordeiro, Rafael F de O Franca, André Ls de Oliveira, Christina A Peixoto, Walter S Leal, Constância Fj Ayres
Zika virus (ZIKV) is a flavivirus that has recently been associated with an increased incidence of neonatal microcephaly and other neurological disorders. The virus is primarily transmitted by mosquito bite, although other routes of infection have been implicated in some cases. The Aedes aegypti mosquito is considered to be the main vector to humans worldwide; however, there is evidence that other mosquito species, including Culex quinquefasciatus, transmit the virus. To test the potential of Cx. quinquefasciatus to transmit ZIKV, we experimentally compared the vector competence of laboratory-reared Ae...
August 9, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28745311/outer-membrane-vesicle-associated-lipase-ftla-enhances-cellular-invasion-and-virulence-in-francisella-tularensis-lvs
#4
Fei Chen, Guolin Cui, Shuxia Wang, Manoj Kumar Mohan Nair, Lihong He, Xinyi Qi, Xiangmin Han, Hanqi Zhang, Jing-Ren Zhang, Jingliang Su
Francisella tularensis is a highly infectious intracellular pathogen that infects a wide range of host species and causes fatal pneumonic tularemia in humans. ftlA was identified as a potential virulence determinant of the F. tularensis live vaccine strain (LVS) in our previous transposon screen, but its function remained undefined. Here, we show that an unmarked deletion mutant of ftlA was avirulent in a pneumonia mouse model with a severely impaired capacity to infect host cells. Consistent with its sequence homology with GDSL lipase/esterase family proteins, the FtlA protein displayed lipolytic activity in both E...
July 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28745310/a-two-step-algorithm-for-rapid-diagnosis-of-active-pulmonary-tuberculosis-in-entry-applicants-using-the-t-spot-tb-and-xpert-mtb-rif-assays-in-shanghai-china
#5
Chengyan Meng, Yaojie Shen, Jian Wang, Sen Wang, Xinchang Chen, Shenglei Yu, Wei Ye, Jing Wu
No abstract text is available yet for this article.
July 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28745309/a-quantitative-and-efficient-approach-to-select-miru-vntr-loci-based-on-accumulation-of-the-percentage-differences-of-strains-for-discriminating-divergent-mycobacterium-tuberculosis-sublineages
#6
Xin-Ling Pan, Chun-Lei Zhang, Chie Nakajima, Jin Fu, Chang-Xia Shao, Li-Na Zhao, Jia-Yi Cui, Na Jiao, Chang-Long Fan, Yasuhiko Suzuki, Toshio Hattori, Di Li, Hong Ling
Although several optimal mycobacterial interspersed repetitive units-variable number tandem repeat (MIRU-VNTR) loci have been suggested for genotyping homogenous Mycobacterium tuberculosis, including the Beijing genotype, a more efficient and convenient selection strategy for identifying optimal VNTR loci is needed. Here 281 M. tuberculosis isolates were analyzed. Beijing genotype and non-Beijing genotypes were identified, as well as Beijing sublineages, according to single nucleotide polymorphisms. A total of 22 MIRU-VNTR loci were used for genotyping...
July 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28745308/coxsackievirus-a16-utilizes-cell-surface-heparan-sulfate-glycosaminoglycans-as-its-attachment-receptor
#7
Xueyang Zhang, Jinping Shi, Xiaohua Ye, Zhiqiang Ku, Chao Zhang, Qingwei Liu, Zhong Huang
Coxsackievirus A16 (CVA16) is one of the major pathogens responsible for hand, foot and mouth disease, which affects more than two million children in the Asian-Pacific region annually. Previous studies have shown that scavenger receptor B2 is a functional receptor for CVA16 that facilitates the uncoating process. However, it remains unclear whether other receptors are required for efficient CVA16 infection. In this study, by using a variety of assays we demonstrated that CVA16 utilizes surface heparan sulfate glycosaminoglycans as its attachment receptor...
July 26, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28698668/salmonella-enterica-serovar-typhimurium-st34-co-expressing-blandm-5-and-blactx-m-55-isolated-in-china
#8
Lang Yang, Xiaofeng Hu, Xuebin Xu, Chaojie Yang, Jing Xie, Rongzhang Hao, Xinying Du, Ligui Wang, Leili Jia, Peng Li, Shaofu Qiu, Hongbin Song
No abstract text is available yet for this article.
July 12, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28698667/phylogenetic-analysis-reveals-two-genotypes-of-the-emerging-fungus-mucor-indicus-an-opportunistic-human-pathogen-in-immunocompromised-patients
#9
Saad J Taj-Aldeen, Muna Almaslamani, Bart Theelen, Teun Boekhout
Mucormycosis is a rare fungal infection caused by Mucor indicus. Phylogenetic analysis of many M. indicus isolates, mainly sampled from different clinical and environmental specimens collected worldwide, revealed two genotypes, I and II, based on ITS and D1/D2 LSU rDNA sequences. A retrospective review of the literature revealed 13 cases. Eight (76.9%) patients had disseminated infections, and the overall mortality rate was 30.7%. A pulmonary infection caused by M. indicus genotype I in a liver transplant recipient was disseminated to include the skin and was successfully treated with liposomal amphotericin B and aggressive surgery...
July 12, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28698666/modelling-person-to-person-transmission-in-an-enterovirus-a71-orally-infected-hamster-model-of-hand-foot-and-mouth-disease-and-encephalomyelitis
#10
Win Kyaw Phyu, Kien Chai Ong, Kum Thong Wong
Enterovirus A71 (EV-A71) causes hand-foot-and-mouth disease (HFMD), which may be complicated by fatal encephalomyelitis. Although fecal-oral or oral-oral routes are important in person-to-person transmission, how viral shedding and exposure may predispose individuals to infection remains unknown. We investigated person-to-person transmission by using a model of HFMD and encephalomyelitis based on EV-A71 oral infection of 2-week-old hamsters. Animals (index animals) infected with 10(4) 50% cell culture infective doses of virus uniformly developed severe disease four days post-infection (dpi), whereas littermate contacts developed severe disease after six to seven days of exposure to index animals...
July 12, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28698665/antigens-rv0310c-and-rv1255c-are-promising-novel-biomarkers-for-the-diagnosis-of-mycobacterium-tuberculosis-infection
#11
Liulin Luo, Lin Zhu, Jun Yue, Jianping Liu, Guoyuan Liu, Xuelian Zhang, Honghai Wang, Ying Xu
This study aimed to identify novel immunogenic epitopes from Mycobacterium tuberculosis (MTB) that could be used in tuberculosis (TB) diagnostics. To determine the diagnostic potential of mycobacterial antigens in serodiagnosis of TB, 256 patients were enrolled in a study and divided into two groups: 126 smear-positive pulmonary TB patients (SPPT) and 130 smear-negative pulmonary TB patients (SNPT); 152 bacillus Calmette-Guerin (BCG)-vaccinated healthy people were used as a control. Murine results showed that antigens Rv0310c-E from RD 8 and Rv1255c-E from RD 10 were strongly immunogenic to Th1 cells and induced a great humoral response...
July 12, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28655936/a-novel-neutralizing-monoclonal-antibody-targeting-the-n-terminal-domain-of-the-mers-cov-spike-protein
#12
Yingzhu Chen, Shuai Lu, Hao Jia, Yao Deng, Jianfang Zhou, Baoying Huang, Yueyang Yu, Jiaming Lan, Wenling Wang, Yongliang Lou, Kun Qin, Wenjie Tan
This corrects the article DOI: 10.1038/emi.2017.18.
June 28, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634359/infections-of-horses-and-shrews-with-bornaviruses-in-upper-austria-a-novel-endemic-area-of-borna-disease
#13
Herbert Weissenböck, Zoltán Bagó, Jolanta Kolodziejek, Barbara Hager, Günter Palmetzhofer, Ralf Dürrwald, Norbert Nowotny
Borna disease, a lethal infection with Borna disease virus-1 (BoDV-1), was diagnosed in four horses from Upper Austria in 2015 and 2016. All cases occurred in winter (two cases in February 2015 and two cases in December 2016), and the maximal distance of the affected stables was 17 km. To demonstrate whether the causative agent was also harbored by its reservoir host, the bicolored white-toothed shrew (Crocidura leucodon), 28 shrews from this geographic area were collected in 2015 and investigated for the presence of BoDV-1...
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634358/hiv-1-gp41-targeting-fusion-inhibitory-peptides-enhance-the-gp120-targeting-protein-mediated-inactivation-of-hiv-1-virions
#14
Qianqian Qi, Qian Wang, Weizao Chen, Lanying Du, Dimiter S Dimitrov, Lu Lu, Shibo Jiang
Protein- or peptide-based viral inactivators are being developed as novel antiviral drugs with improved efficacy, pharmacokinetics and toxicity profiles because they actively inactivate cell-free human immunodeficiency virus type 1 (HIV-1) virions before attachment to host cells. By contrast, most clinically used antiviral drugs must penetrate host cells to inhibit viral replication. In this study, we pre-treated HIV-1 particles with a gp120-targeting bispecific multivalent protein, 2Dm2m or 4Dm2m, in the presence or absence of the gp41-targeting HIV-1 fusion inhibitory peptides enfuvirtide (T20), T2635, or sifuvirtide (SFT)...
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634357/astroviruses-in-bats-madagascar
#15
Camille Lebarbenchon, Beza Ramasindrazana, Léa Joffrin, Sandra Bos, Erwan Lagadec, Gildas Le Minter, Yann Gomard, Pablo Tortosa, David A Wilkinson, Steven M Goodman, Patrick Mavingui
No abstract text is available yet for this article.
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634356/an-outbreak-of-echovirus-18-encephalitis-meningitis-in-children-in-hebei-province-china-2015
#16
Xiangpeng Chen, Jingjie Li, Jiayun Guo, Wenbo Xu, Suzhen Sun, Zhengde Xie
No abstract text is available yet for this article.
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634355/longitudinal-study-of-middle-east-respiratory-syndrome-coronavirus-infection-in-dromedary-camel-herds-in-saudi-arabia-2014-2015
#17
Maged Gomaa Hemida, Abdulmohsen Alnaeem, Daniel Kw Chu, Ranawaka Apm Perera, Samuel Ms Chan, Faisal Almathen, Emily Yau, Brian Cy Ng, Richard J Webby, Leo Lm Poon, Malik Peiris
Two herds of dromedary camels were longitudinally sampled with nasal and rectal swabs and serum, between September 2014 and May 2015, and the samples were tested for Middle East Respiratory Syndrome (MERS) coronavirus RNA and antibodies. Evidence of MERS-CoV infection was confirmed in one herd on the basis of detection of virus RNA in nasal swabs from three camels and significant increases in the antibody titers from three others. The three viruses were genetically identical, thus indicating introduction of a single virus into this herd...
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634354/primary-osteomyelitis-caused-by-an-ndm-1-producing-k-pneumoniae-strain-of-the-highly-virulent-sequence-type-23
#18
Fabrice Compain, Alexis Vandenberghe, Marie Gominet, Nathalie Genel, David Lebeaux, Astrid Ramahefasolo, Isabelle Podglajen, Dominique Decré
No abstract text is available yet for this article.
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634353/coronavirus-hku15-in-respiratory-tract-of-pigs-and-first-discovery-of-coronavirus-quasispecies-in-5-untranslated-region
#19
Patrick Cy Woo, Susanna Kp Lau, Chi-Ching Tsang, Candy Cy Lau, Po-Chun Wong, Franklin Wn Chow, Jordan Yh Fong, Kwok-Yung Yuen
Coronavirus HKU15 is a deltacoronavirus that was discovered in fecal samples of pigs in Hong Kong in 2012. Over the past three years, Coronavirus HKU15 has been widely detected in pigs in East/Southeast Asia and North America and has been associated with fatal outbreaks. In all such epidemiological studies, the virus was generally only detected in fecal/intestinal samples. In this molecular epidemiology study, we detected Coronavirus HKU15 in 9.6% of the nasopharyngeal samples obtained from 249 pigs in Hong Kong...
June 21, 2017: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/28634352/differences-in-sequences-between-hbv-relaxed-circular-dna-and-covalently-closed-circular-dna
#20
Magda Rybicka, Anna Woziwodzka, Tomasz Romanowski, Piotr Stalke, Marcin Dręczewski, Krzysztof Piotr Bielawski
The hepatitis B virus (HBV) genome exists in two forms: circular covalently closed DNA (cccDNA) and relaxed circular DNA (RCDNA). Here, we investigated the presence of differences in the sequences of both forms in paired samples of serum and liver tissue. The serum and liver biopsy samples were collected at the same time from 67 chronically infected patients. The genotyping of the RCDNA and cccDNA was performed using mass spectrometry analysis. The HBV mutations located in the HBV pol (P) and the HBV basal core promoter/pre-core (BCP/PC) regions were included...
June 21, 2017: Emerging Microbes & Infections
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