Enzyme-Linked Immunosorbent Assay for Detection of Serum or Mucosal Isotype-Specific IgG and IgA Whole-Virus Antibody to Influenza A Virus in Swine

Enzyme-linked immunosorbent assays can be used to detect isotype-specific anti-influenza antibodies in biological samples to characterize the porcine immune response to influenza A virus. The isotype antibody assay is based on an indirect ELISA using whole influenza virus as antigen and detection antibodies directed against porcine IgG and IgA. Samples such as serum, nasal wash, and bronchoalveolar lavage fluid allow for evaluation of systemic, upper, and lower respiratory tract mucosal antibody responses, respectively. The isotype ELISA assay is performed in a 96-well format using anti-swine detection antibodies conjugated to an enzyme that catalyze a color change reaction. The optical density of the sample is measured using an automated plate reader. The assay is useful to characterize the IgG or the IgA response to challenge or vaccination against specific influenza virus isolates in different compartments of the immune system.
Source: Springer protocols feed by Infectious Diseases - Category: Infectious Diseases Source Type: news

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‚ÄčI recently met with a group from our children's hospital to standardize the hospital management of bronchiolitis according to the latest American Academy of Pediatrics guidelines. (Pediatrics 2014;134[5]:e1474; http://bit.ly/2QIGbMX.) Unfortunately, these guidelines seem to cause confusion for experienced and inexperienced emergency physicians alike.This confusion comes from the guidelines raising unaddressed issues and new questions, most importantly not tackling important aspects of frontline clinical practice. These guidelines were developed with the best evidence currently available, and their application mostly cau...
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Source: Australasian Psychiatry - Category: Psychiatry Authors: Tags: Australas Psychiatry Source Type: research
We describe here that pre-exposure with a live virus generated via a A/WSN/1933(H1N1) reverse genetics system resulted in a significant reduction of viral shedding from pigs exposed to either a swine H1N1 virus or a swine H3N2 virus. At 3-day post challenge (DPC), approximately 1 log and 1.5 logs reductions of viral shedding were observed in the swine H1N1- and H3N2-challenged vaccinated pigs when compared to unvaccinated animals. A further decline in viral load was observed at 5 DPC where viral shedding was decreased by greater than 3 logs in vaccinated pigs receiving either the H1N1 or H3N2 virus challenge. Although the ...
Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
W, Taylor C, Wentworth DE, Xu X, Zanders N, Katz J, Jernigan D Abstract During May 20-October 13, 2018,* low levels of influenza activity were reported in the United States, with a mix of influenza A and B viruses circulating. Seasonal influenza activity in the Southern Hemisphere was low overall, with influenza A(H1N1)pdm09 predominating in many regions. Antigenic testing of available influenza A and B viruses indicated that no significant antigenic drift in circulating viruses had emerged. In late September, the components for the 2019 Southern Hemisphere influenza vaccine were selected and included an incremen...
Source: MMWR Morb Mortal Wkl... - Category: Epidemiology Authors: Tags: MMWR Morb Mortal Wkly Rep Source Type: research
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Source: Infection, Genetics and Evolution - Category: Genetics & Stem Cells Authors: Tags: Infect Genet Evol Source Type: research
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Source: Preventive Veterinary Medicine - Category: Veterinary Research Source Type: research
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Source: NYT Health - Category: Consumer Health News Authors: Tags: Influenza Swine Influenza Vaccination and Immunization Winter (Season) Epidemics Centers for Disease Control and Prevention Source Type: news
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Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
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Source: Women Birth - Category: Midwifery Authors: Tags: Women Birth Source Type: research
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Source: Veterinary Microbiology - Category: Veterinary Research Source Type: research
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