Persistence of antibodies after natural infection with swine influenza virus and epidemiology of the infection in a herd previously considered influenza-negative
نویسنده
چکیده
Results obtained using the HI test may vary, depending on the SIV strain used as antigen.1 Rossow et al2 showed that after an outbreak associated with an H3N2 strain of SIV, the HI test, using as antigen the regular prototype of H3N2 virus routinely used in diagnostic laboratories, gave low or no detectable titers. When the strain isolated from the case was used as antigen, convalescent sera had expected titers (range of reciprocal titers, 20 to 320). These results demonstrate the value of testing convalescent sera with homologous virus when serological test results are unexpectedly negative or low.
منابع مشابه
Bilateral Pulmonary Thromboembolism: An Unusual Presentation of Infection with Influenza A (H1N1) Virus
Swine flue is a highly contagious acute respiratory disease caused by a subtype of influenza A virus. Herein we present three patients with H1N1 infection complicated with pulmonary thromboembolism. The patients had chest pain and unexplained dyspnea. Imaging studies showed bilateral hilar predominance. Computed tomographic angiography confirmed bilateral thromboembolism (an unusual presentatio...
متن کاملInfluenza A virus among the hospitalized young children with acute respiratory infection. Is influenza A co infected with respiratory syncytial virus?
Background: Both influenza A virus (IAV) and respiratory syncytial virus (RSV) cause acute respiratory infection (ARI) in infants and young children. This study was conducted to determine Influenza A virus and its co infection with RSV among the hospitalized children with ARI. Methods: A total of 153 throat samples of the hospitalized young children aged between below one year and 5 years with...
متن کاملHigh Titers of Hemagglutination Inhibition Antibodies against 2009 H1N1 Influenza Virus in Southern Iran
Background: Pandemic flu had at least two waves in Iran. Knowing how many of the general population were already exposed to this infection has a major impact on na-tional preventive measures. As of December 30, 2009, a total of 3672 confirmed cases of human infection with a novel Influenza A (2009 H1N1) virus had been reported in Iran with 140 deaths. Objective: In this study we aim to measure,...
متن کاملSerological prevalence of avian H9N2 influenza virus in dogs by hemagglutination inhibition assay in Kerman, southeast of Iran
Influenza is a highly contagious zoonotic disease in the world. Avian H9N2 influenza virus is a significant pandemic pathogen widely distributed throughout the world. Pet ownership has been documented as a risk factor for infection transmission to human. Considering major public health concern, the prevalence of antibodies against avian H9N2 influenza virus was evaluated in 170 serum samples of...
متن کاملPolyclonal Antibody against Recombinant Nucleoprotein of the Influenza A Virus (H1N1); Production and Purification
Background and Aims: Influenza is an acute respiratory illness that is caused by a virus belonging to Orthomyxoviridae family. This virus spreads rapidly every year in cold season and leads to morbidities and mortalities especially in adults and children, which causes billions of dollars of economic losses. Accordingly, development of a rapid, sensitive and inexpensive laboratory diagnosis base...
متن کامل