PRESENCE OF RESPIRATORY VIRUSES IN EQUINES IN BRAZIL
| Autor: | José Ricardo Pinto, Jorge Mancini-Filho, Rosely Cabette Barbosa Alves, Aparecida Santo Pietro Pereira, Dalva Assunção Portari Mancini, Enio Mori, Leonardo José Richtzenhain, Adélia Hiroko Nagamori Kawamoto, Rita Maria Zucatelli Mendonça |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Male
lcsh:Arctic medicine. Tropical medicine lcsh:RC955-962 viruses Equines Equine influenza Influenza A Virus H7N7 Subtype Biology Antibodies Viral Serology Parainfluenza virus Hemagglutination inhibition test Influenza A Virus H3N8 Subtype Blood serum Orthomyxoviridae Infections Virology Animals Horses TESTES DE HEMAGLUTINAÇÃO Hemagglutination assay Antibody titer Age Factors virus diseases General Medicine Hemagglutination Inhibition Tests Vaccination Infectious Diseases Immunology biology.protein Female Horse Diseases Antibody Influenza virus Brazil Parainfluenza-3 |
| Zdroj: | Revista do Instituto de Medicina Tropical de São Paulo Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP Revista do Instituto de Medicina Tropical de São Paulo, Vol 56, Iss 3, Pp 191-195 (2014) |
| ISSN: | 1678-9946 0036-4665 |
| Popis: | Equines are susceptible to respiratory viruses such as influenza and parainfluenza. Respiratory diseases have adversely impacted economies all over the world. This study was intended to determine the presence of influenza and parainfluenza viruses in unvaccinated horses from some regions of the state of São Paulo, Brazil. Blood serum collected from 72 equines of different towns in this state was tested by hemagglutination inhibition test to detect antibodies for both viruses using the corresponding antigens. About 98.6% (71) and 97.2% (70) of the equines responded with antibody protective titers (≥ 80 HIU/25µL) H7N7 and H3N8 subtypes of influenza A viruses, respectively. All horses (72) also responded with protective titers (≥ 80) HIU/25µL against the parainfluenza virus. The difference between mean antibody titers to H7N7 and H3N8 subtypes of influenza A viruses was not statistically significant (p > 0.05). The mean titers for influenza and parainfluenza viruses, on the other hand, showed a statistically significant difference (p < 0.001). These results indicate a better antibody response from equines to parainfluenza 3 virus than to the equine influenza viruses. No statistically significant differences in the responses against H7N7 and H3N8 subtypes of influenza A and parainfluenza 3 viruses were observed according to the gender (female, male) or the age (≤ 2 to 20 years-old) groups. This study provides evidence of the concomitant presence of two subtypes of the equine influenza A (H7N7 and H3N8) viruses and the parainfluenza 3 virus in equines in Brazil. Thus, it is advisable to vaccinate equines against these respiratory viruses. |
| Databáze: | OpenAIRE |
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