Swine influenza surveillance and the impact of human influenza epidemics on pig herds in the Czech Republic
2001
Pospisil, Z. | Lany, P. | Buchta, J. | Zendulkova, D. | Cihal, P. (Veterinarni a Farmaceuticka Univ., Brno (Czech Republic). Ustav Infekcnich Chorob a Epizootologie) | Tumova, B.
Epizootiological and virological surveys carried out between 1995 and mid-2000 corroborated the findings from the end of the 1970s that swine influenza did not cause any serious problems in pig herds in the Czech Republic. In the present study, no antibodies against either swine influenza virus, types A (H1N1) and A (H3N2), or avian influenza virus, A (H1N1), were demonstrated and no influenza virus was isolated. In contrast, antibodies against the human influenza virus isolated during the 1995 epidemic were found. The dynamics of antibody formation indicated that the human virus gradually disappeared from the pig population. It is possible that the human virus was introduced to the pig herds by infected animal attendants, in whom antibodies against this virus were also found. During the second human influenza epidemic in 1998/99, however, pigs remained free from antibody response to influenza virus.
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