Influenza A Viruses of Human Origin in Swine, Brazil.

Influenza A Viruses of Human Origin in Swine, Brazil. Emerg Infect Dis. 2015 Aug;21(8):1339-1347 Authors: Nelson MI, Schaefer R, Gava D, Cantão ME, Ciacci-Zanella JR Abstract The evolutionary origins of the influenza A(H1N1)pdm09 virus that caused the first outbreak of the 2009 pandemic in Mexico remain unclear, highlighting the lack of swine surveillance in Latin American countries. Although Brazil has one of the largest swine populations in the world, influenza was not thought to be endemic in Brazil's swine until the major outbreaks of influenza A(H1N1)pdm09 in 2009. Through phylogenetic analysis of whole-genome sequences of influenza viruses of the H1N1, H1N2, and H3N2 subtypes collected in swine in Brazil during 2009-2012, we identified multiple previously uncharacterized influenza viruses of human seasonal H1N2 and H3N2 virus origin that have circulated undetected in swine for more than a decade. Viral diversity has further increased in Brazil through reassortment between co-circulating viruses, including A(H1N1)pdm09. The circulation of multiple divergent hemagglutinin lineages challenges the design of effective cross-protective vaccines and highlights the need for additional surveillance. PMID: 26196759 [PubMed - as supplied by publisher]
Source: Emerging Infectious Diseases - Category: Infectious Diseases Authors: Tags: Emerg Infect Dis Source Type: research

Related Links:

This study represents the first effort to evaluate the sensitivity of lizard populations and elasticity to climate change and demonstrate the geographic variability of these traits in three widespread and habitat-generalist species. We highlight the need of new studies focusing on species with different biological trait patterns, such as endemic distributions and habitat-specialists, to provide the theoretical and empirical basis for biologically informed conservation strategies and actions, in order to minimize the potential extinction of populations due to climate change.
Source: Comparative Biochemistry and Physiology Part A: Molecular and Integrative Physiology - Category: Biochemistry Source Type: research
Publication date: Available online 15 July 2019Source: Biochimica et Biophysica Acta (BBA) - BiomembranesAuthor(s): C.T. Höfer, S. Di Lella, I. Dahmani, N. Jungnick, N. Bordag, S. Bobone, Q. Huan, S. Keller, A. Herrmann, S. Chiantia
Source: Biochimica et Biophysica Acta (BBA) Biomembranes - Category: Biochemistry Source Type: research
Publication date: Available online 15 July 2019Source: EpidemicsAuthor(s): Julian Chantrey, Timothy Dale, David Jones, Michael Begon, Andy FentonAbstractMany pathogens of conservation concern circulate endemically within natural wildlife reservoir hosts and it is imperative to understand the individual and ecological drivers of natural transmission dynamics, if any threat to a related endangered species is to be assessed. Our study highlights the key drivers of infection and shedding dynamics of squirrelpox virus (SQPV) in its reservoir grey squirrel (Sciurus carolinensis) population. To clarify SQPV dynamics in this popul...
Source: Epidemics - Category: Epidemiology Source Type: research
This article evaluates the textual evidence for bubonic plague in classical antiquity from medical sources and discusses methodologies for "retrospective diagnosis" in light of new developments in microbiology. A close study of Greek medical texts suggests that bubonic plague was unfamiliar to medical writers until sometime before the second century AD, when sources cited by Rufus of Ephesus report a disease that resembles bubonic plague. Rufus of Ephesus describes this disease around AD 100, and Aretaeus (fl. ca. AD 50 or 150) appears to describe the same disease as well. Intriguingly, the disease then disappear...
Source: Medical History - Category: History of Medicine Authors: Tags: Bull Hist Med Source Type: research
Publication date: February 2020Source: Nonlinear Analysis: Real World Applications, Volume 51Author(s): Lin Zhao, Zhi-Cheng Wang, Shigui RuanAbstractCoinfection of hosts with multiple strains or serotypes of the same agent, such as different influenza virus strains, different human papilloma virus strains, and different dengue virus serotypes, is not only a very serious public health issue but also a very challenging mathematical modeling problem. In this paper, we study a time-periodic two-strain SIS epidemic model with diffusion and latent period. We first define the basic reproduction number R0i and introduce the invasi...
Source: Nonlinear Analysis: Real World Applications - Category: Research Source Type: research
Conditions:   Cancer of Cervix;   Vaccinia Intervention:   Biological: Gardasil Sponsors:   University of Fukui;   Merck Sharp & Dohme Corp. Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
Ahead of a key expert meeting convened by  the United Nations to decide whether to declare the ongoing Ebola outbreak in the Democratic Republic of the Congo (DRC) an international health emergency, the UN Children’s Fund UNICEF warned that the epidemic “is infecting more children” than earlier outbreaks.  
Source: UN News Centre - Health, Poverty, Food Security - Category: International Medicine & Public Health Source Type: news
An Atlanta hotel relocated guests after reports of possible Legionnaires disease connected to the hotel
Source: ABC News: Health - Category: Consumer Health News Tags: Health Source Type: news
Conclusions: Because S. pneumoniae was the primary cause of invasive infections, pneumococcal vaccines may be considered as a preventive intervention in children with nephrotic syndrome. Additionally, penicillin can be used to prevent and treat pneumococcal infections in children with nephrotic syndrome in Bangladesh.
Source: The Pediatric Infectious Disease Journal - Category: Infectious Diseases Tags: Original Studies Source Type: research
Publication date: Available online 1 September 2015 Source:Veterinary Microbiology Author(s): JANICE REIS CIACCI-ZANELLA, REJANE SCHAEFER, DANIELLE GAVA, VANESSA HAACH, MAURÍCIO EGÍDIO CANTÃO, ARLEI COLDEBELLA Influenza A virus (FLUAV) infections are endemic in pork producing countries worldwide but in Brazil it was not considered an important pathogen in pigs. Since the emergence of 2009 pandemic H1N1 (H1N1pdm) FLUAV, many outbreaks of respiratory disease were observed in pig herds. The aim of this study was to evaluate FLUAV infection in swine in 48 pig farms located in seven Brazilian states...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
More News: Endemics | Flu Pandemic | H1N1 | H1N2 | H3N2 | Infectious Diseases | Influenza | Influenza Vaccine | Outbreaks | Pandemics | Swine Flu | Swine Flu (H1N1) Vaccine | Vaccines