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The main cause of the sweating sickness is an epitheliotropic toxin produced by females of certain strains of Hyalomma truncatum. [4] The toxin develops in the tick organism, not in the vertebrate host. This disease widely spread in eastern, central and southern Africa, Sri Lanka and Southern India.
Hence, a very small proportion of the farmland is solely devoted to livestock production. In Sri Lanka, livestock sector contributes around 1.2% of the national GDP. Livestock is spread throughout all regions of Sri Lanka with concentrations of certain farming systems in particular areas due to cultural, market and agro-climatic reasons.
Other members of this genus cause Border disease (sheep) and classical swine fever (pigs) which cause significant financial loss to the livestock industry. [8] Pestiviruses are small, spherical, single-stranded, enveloped RNA viruses of 40 to 60 nm in diameter. [9]
An estimated 400,000 cattle infected with BSE entered the human food chain in the 1980s. [citation needed] Although the BSE epizootic was eventually brought under control by culling all suspect cattle populations, people are still being diagnosed with vCJD each year (though the number of new cases currently has dropped to fewer than five per ...
Stress often serves as the final precursor to BRD. The diseases that make up BRD can persist in a cattle herd for a long period of time before becoming symptomatic, but immune systems weakened by stress can stop controlling the disease. Major sources of stress come from the shipping process [15] and from the co-mingling of cattle. [9]
Coccidiosis (in cattle also known as Eimeriosis) is one of the most important diseases in calves and youngstock both under housing conditions and when grazing. Symptoms are generally caused by the species Eimeria zuernii and Eimeria bovis and include loss of appetite, fatigue, dehydration, and watery, sometimes bloody, diarrhoea. [ 4 ]
In India from 1974–1986, HS was responsible for the highest mortality rate of infectious diseases in buffaloes and cattle, and was second in its morbidity rate in the same animals. When compared to foot and mouth disease, rinderpest, anthrax and black leg, [28] HS accounted for 58.7% of the deaths due to these five endemic diseases. [28] [29]
In an 1877 testimony to the Cape of Good Hope Commission on Diseases of Sheep and Goats livestock producer J. Webb testified that the appearance of ticks on his farm 8 or 9 years earlier corresponded with an onset of fatal disease in his livestock. Webb reported opening the chest of the victims and discovering the "heart bag" to be full of "water."