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. 2023 Dec 11;13(24):3815.
doi: 10.3390/ani13243815.

Environmental and Breed Risk Factors Associated with the Prevalence of Subclinical Mastitis in Dual-Purpose Livestock Systems in the Arauca Floodplain Savannah, Colombian Orinoquia

Arcesio Salamanca-Carreño  1 , Mauricio Vélez-Terranova  2 , Diana Patricia Barajas-Pardo  1 , Rita Tamasaukas  3 , Raúl Jáuregui-Jiménez  4 , Pere M Parés-Casanova  5
Affiliations

Environmental and Breed Risk Factors Associated with the Prevalence of Subclinical Mastitis in Dual-Purpose Livestock Systems in the Arauca Floodplain Savannah, Colombian Orinoquia

Arcesio Salamanca-Carreño et al. Animals (Basel). .

Abstract

The aim of this study was to assess the environmental and breed risk factors associated with the prevalence of subclinical mastitis (SCM) in cows in the dual-purpose livestock system of Arauca, Colombian Orinoquia. Milk samples were taken from 1924 mammary quarters, corresponding to 481 cows on 28 different farms, and the California Mastitis Test (CMT) was applied. Risk factors associated with SCM were determined using multiple logistic regression analysis. The response variable was the presence (1) or absence (0) of SCM. Breed was included as a genetic risk factor, and daily milk production, number of cows in production, lactation month, calving number, cow age, climatic period, and body condition were included as environmental risk factors. The analysis of the odds ratio (OR) of significant effects indicated that the factors significantly associated with the presence of SCM were the number of cows (OR = 2.29; p = 0.005), milk production (OR = 0.88; p = 0.045), and the Taurus-Indicus breeds (OR = 1.79; p = 0.009) and composite breed (OR = 3.95; p = 0.005). In this study, the occurrence of SCM was determined by the following risk factors: number of cows, milk production, and breed. Likewise, the highest prevalence seemed to occur on farms with less technological development and sanitary management of producers from the lowest socioeconomic stratum.

Keywords: calving number; dairy farms; genetic traits; hand milking; prevalence level.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Red color: location of the department of Arauca, Colombian Orinoquia. Circle: area where the farms were sampled.
Figure 2
Figure 2
Mammary quarters’ positions for milk sampling. RP = right posterior, LP = left posterior, RA = right anterior, and LA = left anterior.
See this image and copyright information in PMC

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