Toxoplasmosis is a disease of cats as well as other mammals and birds and is caused by a parasite called Toxoplasma gondii. Toxoplasma infection is common, but a full-blown case is rare. T. gondii is important because virtually all warm-blooded animals, including man, can become infected with it. Domestic, wild, and feral cats can transmit Toxoplasma infection to humans. Cats have a 20% to 60% infection rate with T. gondii. Its prevalence is related to several factors including the ingestion of infected animals like rodents and birds as well as raw meat. Stray and feral cats have a higher incidence of infection than pet cats, and older cats have more of a chance of acquiring it.
Symptoms of toxoplasmosis include anorexia, weight loss, lethargy, difficulty breathing (because of pneumonia), eye inflammation, and fever. Other symptoms are vomiting and diarrhea, neurological symptoms, swollen lymph nodes, and jaundice. This infection can be very dangerous in pregnant women and requires immediate medical attention.

Previous about worms in cats.