Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 424692
Title Effects of Temperature, Relative Humidity, Absolute Humidity, and Evaporation Potential on Survival of Airborne Gumboro Vaccine Virus
Author(s) Zhao, Y.; Aarnink, A.J.A.; Dijkman, R.; Fabri, T.; Jong, M.C.M. de; Groot Koerkamp, P.W.G.
Source Applied and Environmental Microbiology 78 (2012)4. - ISSN 0099-2240 - p. 1048 - 1054.
Department(s) LR - Backoffice
Quantitative Veterinary Epidemiology
Farm Technology Group
LR - Innovation Processes
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) infectious bursal disease - air-borne bacteria - enterococcus-faecalis - bioaerosol samplers - 2001 epidemic - inactivation - aerosolization - transmission - poultry - spray
Abstract Survival of airborne virus influences the extent of disease transmission via air. How environmental factors affect viral survival is not fully understood. We investigated the survival of a vaccine strain of Gumboro virus which was aerosolized at three temperatures (10°C, 20°C, and 30°C) and two relative humidities (RHs) (40% and 70%). The response of viral survival to four metrics (temperature, RH, absolute humidity [AH], and evaporation potential [EP]) was examined. The results show a biphasic viral survival at 10°C and 20°C, i.e., a rapid initial inactivation in a short period (2.3 min) during and after aerosolization, followed by a slow secondary inactivation during a 20-min period after aerosolization. The initial decays of aerosolized virus at 10°C (1.68 to 3.03 ln % min-1) and 20°C (3.05 to 3.62 ln % min-1) were significantly lower than those at 30°C (5.67 to 5.96 ln % min-1). The secondary decays at 10°C (0.03 to 0.09 ln % min-1) tended to be higher than those at 20°C (-0.01 to 0.01 ln % min-1). The initial viral survival responded to temperature and RH and potentially to EP; the secondary viral survival responded to temperature and potentially to RH. In both phases, survival of the virus was not significantly affected by AH. These findings suggest that long-distance transmission of airborne virus is more likely to occur at 20°C than at 10°C or 30°C and that current Gumboro vaccination by wet aerosolization in poultry industry is not very effective due to the fast initial decay.
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