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Joceline Lega, Heidi E Brown
Recent events have thrown the spotlight on infectious disease outbreak response. We developed a data-driven method, EpiGro, which can be applied to cumulative case reports to estimate the order of magnitude of the duration, peak and ultimate size of an ongoing outbreak. It is based on a surprisingly simple mathematical property of many epidemiological data sets, does not require knowledge or estimation of disease transmission parameters, is robust to noise and to small data sets, and runs quickly due to its mathematical simplicity...
October 11, 2016: Epidemics
Baochao Fan, Zhengyu Yu, Fengjiao Pang, Xiangwei Xu, Baimeng Zhang, Rongli Guo, Kongwang He, Bin Li
Since 2010, outbreaks of variant porcine epidemic diarrhea virus (PEDV) have swept across the world causing substantial economic losses. The development of new, more effective vaccines has been hampered by difficulties in isolating strains and viral genome manipulation. In the present study, we successfully isolated a highly pathogenic field strain AH2012/12, from a pig farm reporting severe diarrhea in China. Phylogenetic analysis revealed that the new isolate belongs to group G2, which represents epidemic and pandemic field strains...
October 19, 2016: Virology
Ljiljana Zmak, Mihaela Obrovac, Zvjezdana Lovric, Mateja Jankovic Makek, Vera Katalinic Jankovic
As tuberculosis incidence decreases, the possibility of overlooking the disease increases, especially in vulnerable populations. We describe here a major tuberculosis outbreak among mentally ill patients in Croatia, focusing on 1 regional hospital where most patients were hospitalized. The outbreak emphasizes the vulnerability of mentally ill patients to tuberculosis infection and the complexity of infection control measures in psychiatric institutions. The awareness of tuberculosis in these settings should be maintained to interrupt prolonged exposure and avoid unnecessary infection...
October 18, 2016: American Journal of Infection Control
Russell J Brooke, Mirjam Ee Kretzschmar, Volker Hackert, Christian Jpa Hoebe, Peter Fm Teunis, Lance A Waller
We develop a novel approach to study an outbreak of Q fever in 2009 in the Netherlands by combining a human dose-response model with geostatistics prediction to relate probability of infection and associated probability of illness to an effective dose of Coxiella burnetii. The spatial distribution of the 220 notified cases in the at-risk population are translated into a smooth spatial field of dose. Based on these symptomatic cases, the dose-response model predicts a median of 611 asymptomatic infections (95% range 410 to 1,084) for the 220 reported symptomatic cases in the at-risk population; 2...
October 19, 2016: Epidemiology
Yanping Li, Rong Cheng Li, Qiang Ye, Changgui Li, You Ping Liu, Xiao Ma, Yanan Li, Hong Zhao, Xiaoling Chen, Deepak Assudani, Naveen Karkada, Htay Htay Han, Olivier Van Der Meeren, Narcisa Mesaros
We conducted three phase III, randomized, open-label, clinical trials assessing the safety, reactogenicity (all studies), immunogenicity (Primary vaccination study) and persistence of immune responses (Booster study) to the combined diphtheria, tetanus, pertussis, poliomyelitis, and Haemophilus influenzae type b vaccine (DTPa-IPV/Hib) in Chinese infants and toddlers. In the Pilot study (NCT00964028), 50 infants (randomized 1:1) received three doses of DTPa-IPV/Hib at 2-3-4 (Group A) or 3-4-5 months of age (Group B)...
October 21, 2016: Human Vaccines & Immunotherapeutics
Maria A Pérez-Jacoiste Asín, Nerea Carrasco-Antón, Mario Fernández-Ruiz, Rafael San Juan, Rodrigo Alonso-Moralejo, Esther González, Amado Andrés, Francisco López-Medrano, Jose M Aguado
BACKGROUND: The incidence of visceral leishmaniasis (VL) after solid organ transplantation (SOT) is increasing. The optimal therapy for post-transplant VL remains unclear, as relapses after liposomal amphotericin B (L-AmB) are common. Miltefosine has been shown to be effective for treating VL in immunocompetent patients, although data in the specific population of SOT recipients are lacking. METHODS: In the setting of an outbreak of leishmaniasis occurring in Southwest Madrid, we reviewed our experience in 6 SOT recipients with persistent or relapsing VL who received a 28-day course of miltefosine (2...
October 21, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
Piers Mook, Jacquelyn McCormick, Manpreet Bains, Lauren A Cowley, Marie A Chattaway, Claire Jenkins, Amy Mikhail, Gwenda Hughes, Richard Elson, Martin Day, Rohini Manuel, Jayshree Dave, Nigel Field, Gauri Godbole, Timothy Dallman, Paul Crook
In England in 2015, Shigella sonnei isolates from men who have sex with men produced extended-spectrum β-lactamases and exhibited macrolide resistance. Whole-genome sequencing showed a close relationship among the isolates, which harbored a plasmid that was previously identified in a shigellosis outbreak among this population but has acquired a mobile element.
November 2016: Emerging Infectious Diseases
John Lednicky, Valery Madsen Beau De Rochars, Maha Elbadry, Julia Loeb, Taina Telisma, Sonese Chavannes, Gina Anilis, Eleonora Cella, Massinno Ciccozzi, Bernard Okech, Marco Salemi, J Glenn Morris
Mayaro virus has been associated with small outbreaks in northern South America. We isolated this virus from a child with acute febrile illness in rural Haiti, confirming its role as a cause of mosquitoborne illness in the Caribbean region. The clinical presentation can mimic that of chikungunya, dengue, and Zika virus infections.
November 2016: Emerging Infectious Diseases
Priyanka Rajendram, Win Mar Kyaw, Yee Sin Leo, Hanley Ho, Wen Kai Chen, Raymond Lin, De Partha Pratim, Hishamuddin Badaruddin, Brenda Ang, Timothy Barkham, Angela Chow
An outbreak of invasive group B Streptococcus (GBS) disease occurred in Singapore in mid-2015. We conducted a case-control study of 22 adults with invasive GBS infections during June 21-November 21, 2015. Consumption of raw fish was strongly associated with invasive sequence type 283 infections, but not with non-sequence type 283 infections.
November 2016: Emerging Infectious Diseases
Shermin Tan, Yijun Lin, Kelly Foo, Han Fang Koh, Charlene Tow, Yiwen Zhang, Li Wei Ang, Lin Cui, Hishamuddin Badaruddin, Peng Lim Ooi, Raymond Tzer Pin Lin, Jeffery Cutter
We conducted a retrospective study of 40 case-patients and 58 controls as part of a nationwide investigation of a group B Streptococcus outbreak in Singapore in 2015. Eating a Chinese-style raw fish dish (yusheng) was a major risk factor for bacteremia, particularly caused by serotype III sequence type 283.
November 2016: Emerging Infectious Diseases
Xingguang Li, Junjie Zai, Haizhou Liu, Yi Feng, Fan Li, Jing Wei, Sen Zou, Zhiming Yuan, Yiming Shao
Following its immergence in December 2013, the recent Zaire Ebola virus (EBOV) outbreak in West Africa has spread and persisted for more than two years, making it the largest EBOV epidemic in both scale and geographical region to date. In this study, a total of 726 glycoprotein (GP) gene sequences of the EBOV full-length genome obtained from West Africa from the 2014 outbreak, combined with 30 from earlier outbreaks between 1976 and 2008 were used to investigate the genetic divergence, evolutionary history, population dynamics, and selection pressure of EBOV among distinct epidemic waves...
October 21, 2016: Scientific Reports
Audrey Mirand, François Vié le Sage, Bruno Pereira, Robert Cohen, Corinne Levy, Christine Archimbaud, Hélène Peigue-Lafeuille, Jean-Luc Bailly, Cécile Henquell
The clinical impact of enteroviruses associated with hand, foot and mouth disease (HFMD) is unknown outside Asia, and the prevalence of enterovirus A71 (EV-A71) in particular might be underestimated. To investigate the prevalence of enterovirus serotypes and the clinical presentations associated with HFMD in France, we conducted prospective ambulatory clinic-based surveillance of children during April 2014-March 2015. Throat or buccal swabs were collected from children with HFMD and tested for the enterovirus genome...
November 2016: Emerging Infectious Diseases
E Schleihauf, S Mutschall, B Billard, E N Taboada, D Haldane
A subtyping methodology for Campylobacter, Comparative Genomic Fingerprinting (CGF40), has been described recently. The objective of this study was to assess the utility of CGF40 as a tool to enhance routine public health surveillance of campylobacteriosis. Isolates of Campylobacter from across the province were requested and sent for CGF40 subtyping. Epidemiological data from cases reported to public health officials in Nova Scotia, Canada, from January 2012 to March 2015 were linked with blinded CGF40 subtyping results...
October 21, 2016: Epidemiology and Infection
Ganesh Veerasekar, Krishnan Swaminathan
BACKGROUND: Using technology to track endemic areas of communicable diseases is possible nowadays. Effectual use of such facilities, especially in developing countries, will increase earlier detection of cases as well as aid in the formulation of effective prevention strategies. METHODS: A retrospective data analysis was carried out by collecting the details of patients presented with positive dengue serology, during the outbreak season in the second half of 2012, at Kovai Medical Center and Hospital, Coimbatore, India...
October 2016: Journal of the Association of Physicians of India
Hanan Polansky, Edan Itzkovitz, Adrian Javaherian
BACKGROUND: We conducted a clinical study that tested the effect of suppressive treatment with the botanical product Gene-Eden-VIR/Novirin on genital herpes. Our previous paper showed that the treatment decreased the number of genital herpes outbreaks without any side effects. It also showed that the clinical effects of Gene-Eden-VIR/Novirin are mostly better than those reported in the studies that tested acyclovir, valacyclovir, and famciclovir. The current paper reports the effect of suppressive treatment with Gene-Eden-VIR/Novirin on the duration of outbreaks, in severe and mild genital herpes cases...
December 2016: Clinical and Translational Medicine
Damian Hoy, Salanieta T Saketa, Roy Roger Maraka, Alison Sio, Ian Wanyeki, Pascal Frison, Divi Ogaoga, Dennie Iniakawala, Cynthia Joshua, Sala Duituturaga, Christelle Lepers, Adam Roth, Paul White, Yvan Souares
Mass gatherings pose public health challenges to host countries, as they can cause or exacerbate disease outbreaks within the host location or elsewhere. In July 2012, the 11th Festival of Pacific Arts (FOPA), a mass gathering event involving 22 Pacific island states and territories, was hosted by Solomon Islands. An enhanced syndromic surveillance (ESS) system was implemented for the event. Throughout the capital city, Honiara, 15 sentinel sites were established and successfully took part in the ESS system, which commenced one week before the FOPA (25 June) and concluded eight days after the event (22 July)...
July 2016: Western Pacific Surveillance and Response Journal: WPSAR
Paola Katrina Ching, Ma Justina Zapanta, Vikki Carr de Los Reyes, Enrique Tayag, Rio Magpantay
INTRODUCTION: Measles is a highly infectious viral illness that remains one of the leading causes of death among children worldwide. In the Philippines, decreasing routine vaccination coverage from 2007 to 2011 led to local measles outbreaks. A team investigated a measles outbreak reported in Cordillera of the Philippines in May 2013. METHODS: Measles case data with symptom onset from 2 February to 27 May 2013 were obtained from official sources and verified on site...
July 2016: Western Pacific Surveillance and Response Journal: WPSAR
Marcel D Torode, Kirk L Barnett, Sarah L Facey, Uffe N Nielsen, Sally A Power, Scott N Johnson
Climate change is predicted to result in altered precipitation patterns, which may reshape many grassland ecosystems. Rainfall is expected to change in a number of different ways, ranging from periods of prolonged drought to extreme precipitation events, yet there are few community wide studies to accurately simulate future changes. We aimed to test how above- and below-ground grassland invertebrate populations were affected by contrasting future rainfall scenarios. We subjected a grassland community to potential future rainfall scenarios including ambient, increased amount (+50% of ambient), reduced amount (-50% of ambient), reduced frequency (no water for 21 days, followed by the total ambient rainfall applied in a single application) and summer drought (no rainfall for 13 weeks during the growing season)...
2016: Frontiers in Plant Science
Juan Guillermo Cárcamo, Marcelo N Aguilar, Constanza F Carreño, Tamara Vera, Luis Arias-Darraz, Jaime E Figueroa, Alex P Romero, Marco Alvarez, Alejandro J Yañez
Rainbow trout (Oncorhynchus mykiss) subjected to three consecutive, alternating treatments with emamectin benzoate (EMB) and deltamethrin (DM) during outbreaks of Caligus rogercresseyi in a farm located in southern Chile (Hornopiren, Chiloé), were studied to determine the effects of these treatments on the protein and enzymatic activity levels of cytochrome P450 1A (CYP1A), flavin-containing monooxygenase (FMO) and glutathione S-transferase (GST) in different tissues. Consecutive and alternating EMB/DM treatments resulted in a 10-fold increase and 3-fold decrease of CYP1A protein levels in the intestine and gills, respectively...
October 17, 2016: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
Reza Ranjbar, Mitra Ahmadi, Mojtaba Memariani
Salmonella is an important cause of food-borne infection worldwide. Detection of outbreaks caused by Salmonella spp. relies on suitable and robust methods for genotyping. Little is known about the genetic diversity of the Salmonella enterica subspecies enterica serotype Infantis strains isolated from human sources in Iran. In this study, 40 isolates of S. Infantis, which were previously recovered from patients with gastroenteritis or diarrhea in Tehran between years 2007 and 2009, were subjected to multiple-locus variable-number of tandem repeat (VNTR) analysis (MLVA), pulsed-field gel electrophoresis (PFGE), and ERIC-PCR...
October 18, 2016: Microbial Pathogenesis
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