Ecology of influenza viruses in Black-headed Gulls (Chroicocephalus ridibundus) in Croatia

Jurinović, Luka (2014) Ecology of influenza viruses in Black-headed Gulls (Chroicocephalus ridibundus) in Croatia. Doctoral thesis, Faculty of Science > Department of Biology.

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Abstract

The aims of this dissertation were to determine the role of black-headed gulls in spreading the avian influenza virus and to determine the climatic factors affecting dynamics of black-headed gulls in Zagreb area. Black-headed gulls breed in Croatia, but they are much more numerous during winter months. The arrival of first flocks bigger than 1000 birds is correlated with the NAO index while departure to the breeding grounds is not correlated to any of the climatic factors tested. During the study, the overall prevalence of avian influenza in black-headed gulls in Zagreb area was 0.2 % and the most common viruses isolated were of the H13 and H16 subtypes. Still, in the beginning of 2006 the highly pathogenic H5N1 virus was isolated from apparently healthy black-headed gulls on Pantana marsh. It is the very first documented isolation of this virus from apparently healthy black-headed gulls and it indicates that black-headed gulls can carry the virus to great distances without showing any clinical signs.

Item Type: Thesis (Doctoral thesis)
Keywords: wild birds, HPAI, H5N1, LPAI, NAO index
Supervisor: Savić, Vladimir
Date: 2014
Number of Pages: 61
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Grozdana Sirotic
Date Deposited: 01 Jul 2014 09:38
Last Modified: 01 Jul 2014 09:38
URI: http://digre.pmf.unizg.hr/id/eprint/2410

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