The prevalence of T. gondii in meat-producing animals varies widely both within and among countries, and rates of infection have been shown to be dramatically influenced by varying farming and management practices. For instance, animals kept outdoors or in free-ranging environments are more at risk of infection than animals raised indoors or in commercial confinement operations. Pigs
Worldwide, the percentage of pigs harboring viable parasites has been measured to be 3–71.43% and in the United States (via bioassay in mice or cats) to be as high as 92.7% and as low as 0%, depending on the farm or herd. Surveys of seroprevalence (T. gondii antibodies in blood) are more common, and such measurements are indicative of the high relative seroprevalence in pigs across the world. Neonatal piglets have been found to experience the entire range of severity, including progression to stillbirth. : 95  This was especially demonstrated in the foundational Thiptara et al. 2006, reporting a litter birth of three stillborns and six live in Thailand. This observation has been relevant not only to that country but to toxoplasmosis control in porciculture around the world. : 95

Sheep
Along with pigs, sheep and goats are among the most commonly infected livestock of epidemiological significance for human infection. Prevalence of viable T. gondii in sheep tissue has been measured (via bioassay) to be as high as 78% in the United States, and a 2011 survey of goats intended for consumption in the United States found a seroprevalence of 53.4%.
Diffuse infiltrative lymphocytosis syndrome occurs in HIV positive patients with low CD4 counts.It is similar to Sjögrens syndrome, with painless parotid and submandibular swelling, and sicca symptoms. The syndrome typically improves with HAART. == References ==