Determination of Risk Factors Associated with Foot and Mouth Disease Outbreaks in Dairy Farms in Chiang Mai Province, Northern Thailand.

Veerasak Punyapornwithaya,Arisara Charoenpanyanet,Orapun Arjkumpa,Chalutwan Sansamur

doi:10.3390/ani10030512

Determination of Risk Factors Associated with Foot and Mouth Disease Outbreaks in Dairy Farms in Chiang Mai Province, Northern Thailand.

Veerasak Punyapornwithaya, Arisara Charoenpanyanet + Show 2 more

Open Access

https://doi.org/10.3390/ani10030512

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Abstract

Simple SummaryOne hundred and 40 dairy farms that experienced foot and mouth disease (FMD) outbreaks and 307 farms without FMD outbreaks were investigated in this research study. Relevant farm owners were interviewed in order to determine the farm-level risk factors associated with the FMD outbreaks. We established that the risk factors for FMD outbreaks were (1) purchasing a new cow without following quarantine protocol, (2) FMD vaccination administration by non-official livestock personnel, (3) farms located within a 5 km radius of cattle abattoirs, (4) farms located near shared cattle grazing areas in a 10 km radius and (5) no history of FMD outbreaks in the previous year. Most of the risk factors were related to indirect transmissions of FMD and biosecurity practices, thus we have advised dairy farmers to strengthen management practices associated with FMD prevention protocols.Foot and mouth disease (FMD) is considered a highly contagious transboundary disease of cloven-hoofed animals. FMD has become endemic to northern Thailand over the past decade. In 2016, FMD outbreaks were recorded in three districts in Chiang Mai Province. The objective of this study was to determine the farm-level risk factors associated with FMD outbreaks. This study was conducted via a face-to-face interview questionnaire survey at 140 FMD outbreak farms and 307 control farms. Univariable and multivariable logistic regression analyses were used to determine the association between potential risk factors and FMD outbreaks. The final logistic regression model identified factors associated with FMD outbreaks including the purchasing of a new cow without following quarantine protocol (odds ratio = 2.41, 95%CI = 1.45, 4.05), farms located near shared cattle grazing areas in a 10 km radius (OR = 1.83, 95%CI =1.11, 3.02), FMD vaccination administration by non-official livestock personnel (OR = 2.52, 95%CI = 1.39, 4.58), farms located in a 5 km radius of cattle abattoirs (OR = 1.83, 95%CI = 0.99, 3.40) and no history of FMD outbreaks over the previous 12 months in districts where farms were located (OR = 0.44, 95%CI = 0.22, 0.86). The risk factors identified in this study were related to farm biosecurity, FMD vaccination administration and distance from the farms to risk areas. Therefore, it was important to strengthen on-farm biosecurity and to improve farm management practices in order to reduce incidences of FMD at the farm level. Education or training programs for dairy farmers that would enhance knowledge and practices in relation to the assessed topics are needed.

Highlights

Foot and mouth disease (FMD) is considered to be one of the world’s most important livestock diseases, and is a highly contagious transboundary disease of cloven-hoofed animals, including livestock and wildlife [1]
The objective of this study was to quantify the risk factors associated with FMD outbreaks on dairy farms that occur at the farm level
We found that three pairs of variables produced a multicollinearity result that involved collinearity between (1) purchase of a new cow without following quarantine protocol and the entrance of vehicles carrying stock and/or cows out of the farm, (2) the use of tap water on farms and farms located near shared cattle grazing areas in a 10 km radius and (3) farms located in a 5 km radius of cattle abattoirs and farm located near roadways

Summary

Introduction

Foot and mouth disease (FMD) is considered to be one of the world’s most important livestock diseases, and is a highly contagious transboundary disease of cloven-hoofed animals, including livestock and wildlife [1]. It has been classified as a multiple species disease. Due to losses in milk production, fertility problems and potential changes in herd structure as a result of poor proportions of breeding animals within herds, this disease can cause major losses in dairy production [3]. FMD is caused by a virus in the Picornaviridae family and induces vesicles on the feet, mammary glands and in the infected animal’s oral cavity [4,5]. The FMD virus (FMDV) can be transmitted via different routes (i.e., direct or indirect contact between infected and susceptible animals, their secretions, contaminated animal products, etc.) [6]

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