A 2012 survey of 445 purebred pet cats and 45 shelter cats in Finland found an overall seroprevalence of 48.4%, while a 2010 survey of feral cats from Giza, Egypt found a seroprevalence rate of 97.4%. Another survey from Colombia recorded seroprevalence of 89.3%, whereas a Chinese (Guangdong) study found just a 2.1% prevalence.T. gondii infection rates in domestic cats vary widely depending on the cats diets and lifestyles. Feral cats that hunt for their food are more likely to be infected than domestic cats, and naturally also depends on the prevalence of T. gondii-infected prey such as birds and small mammals.Most infected cats will shed oocysts only once in their lifetimes, for a period of about one to two weeks. This shedding can release millions of oocysts, each capable of spreading and surviving for months. An estimated 1% of cats at any given time are actively shedding oocysts.It is difficult to control the cat population with the infected oocysts due to lack of an effective vaccine. This remains a challenge in most cases and the programs that are readily available are questionable in efficacy. Rodents
Infection with T. gondii has been shown to alter the behavior of mice and rats in ways thought to increase the rodents chances of being preyed upon by cats. Infected rodents show a reduction in their innate aversion to cat odors; while uninfected mice and rats will generally avoid areas marked with cat urine or with cat body odor, this avoidance is reduced or eliminated in infected animals.
Cold sensitivity or cold intolerance is unusual discomfort felt by some people when in a cool environment.There is much variation in the sensitivity to cold experienced by different people, with some putting on many layers of clothing while others in the same environment feel comfortable in one layer.Cold sensitivity may be a symptom of hypothyroidism, anemia, fibromyalgia or vasoconstriction. Vitamin B12 deficiency usually accompanies cold intolerance as well. There are other conditions that may cause a cold intolerance, including low body weight, high body temperature and low blood pressure. There may also be differences in people in the expression of uncoupling proteins, thus affecting their amount of thermogenesis. Psychology may also play a factor in perceived temperature. See also
Apparent temperature
Thermoception
Raynaud syndrome


== References ==