Viruses, Vol. 10, Pages 87: A Survey on West Nile and Usutu Viruses in Horses and Birds in Poland

Viruses, Vol. 10, Pages 87: A Survey on West Nile and Usutu Viruses in Horses and Birds in Poland

Viruses doi: 10.3390/v10020087

Authors: Barbara Bażanów Petrus Jansen van Vuren Piotr Szymański Dominika Stygar Agnieszka Frącka Jan Twardoń Roland Kozdrowski Janusz Pawęska

West Nile virus (WNV) and Usutu virus (USUV) are members of the family Flaviviridae which, natural life cycles involve mosquito–bird–mosquito transmission. Both represent emerging viruses in Europe with potential to cause neuroinvasive disease in humans. This study investigates the seroprevalence of serum neutralizing antibodies to WNV and to USUV in birds and in horses in Poland. Antibodies against WNV and USUV were detected in 5 (35.7%) and in 1 (7.14%) of 14 birds and in 62 (15.08%) and in 115 (27.98%) of 411 horses, respectively. Twenty-one WNV serologically positive horses (33.87%) and 67 USUV serologically positive horses (58.26%) did not travel outside Polish borders. Given the high abundance of potentially competent mosquito species in Poland, high populations of horses and different bird species, our findings highlight implementation of active control programs, including monitoring of geographic spread and dynamics of WNV and USUV transmission in both primary and accidental hosts. It is also important to improve public health awareness about the disease these viruses may cause.

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