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Assessment of the chance of infection of dairy cows with food-and-mouth disease virus after spread through water

Schatting van de kans op infectie van melkkoeien door mond- en klauwzeervirus na verspreiding via water

Synopsis

Foot-and-mouth disease (FMD) is a viral disease of domesticated and wild cloven-hoofed animals. The objective of this study was to determine the probability of infecting dairy cows that were drinking FMD virus contaminated surface water due to illegal discharges of contaminated milk. The following data were collected from literature: FMD virus inactivation in aqueous environments, FMD virus concentrations in milk, dilution in sewage water, virus removal by sewage treatment, dilution in surface water, water consumption of cows, size of a herd in a meadow and dose response data for ingested FMD virus by cattle. It was concluded that illegal and uncontrolled discharges of contaminated milk into the sewerage system may lead to high probabilities of infecting other cattle within one day at 6 to 50 km distance of the location of discharge. This clearly underlines current measures that prohibit such discharges and also asks for strict control.
 

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