
Originally Posted by
Malic
Diseases Unique to Pigs
While many domesticated animals (including cows, sheep, and poultry) are capable of infecting humans with disease, Dr. Darwish says that pigs are unique in that they "harbor almost all the diseases that [can] be transmitted from animal to man." This is, he says, "unlike other species, where each [can] transmit only some of these diseases." According to Dr. Darwish, pig diseases may be parasitic, bacterial, or viral.
"The virulence of the disease in pigs is much more than [that of] other animals,"Dr. Darwish said, explaining the difference between two strains of Taenia (tapeworm) present in both cows and pigs.
The species saginata (cow Taenia) "can be expelled through diarrhea and [can] respond well to drugs," Dr. Darwish says. The species solium (pig Taenia) "is more virulent, can resist treatment, and can't be easily washed [out] by drugs causing diarrhea. [The species] saginata sticks itself to human mucosa through suckers, while solium has [both] suckers and hooks and is carcinogenic. If it reaches the brain, spinal cord, or heart, it may be very dangerous," Dr. Darwish adds.
Some diseases associated with swine occur when people touch or consume raw or improperly cooked pork products, while other infections can be transmitted by being in close contact with pigs, drinking water contaminated with their urine, or even inhaling soil that contains particles of pig waste. It is not always obvious when a pig is ill or infected with a particular type of bacteria - thus, it is considered unwise to touch pigs or handle them without taking certain precautions (Zoonotic Disease Prevention).
At highest risk for disease are those who handle swine on a regular basis, especially those who work in farms or in slaughterhouses and those who work as veterinarians. "If we [in vet medicine] find even one [tapeworm] cyst on the carcass of a pig, we exterminate the whole [carcass]," Dr. Darwish says, highlighting the dangers of these cysts to people working in the field of animal research.