The health of dairy goat herds may be compromised by infections caused by small ruminant lentiviruses (SRLV) and Mycoplasma agalactiae , particularly under coinfection conditions. This study investigated a dairy goat herd composed of 38 animals with a history of joint enlargement and reduced milk production in Northeastern Brazil. Clinical, serological, molecular, and phylogenetic analyses were performed using blood, milk, syn...