Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.
What are the risk factors for getting trichinosis?
The major risk factor for contracting trichinosis is eating raw or undercooked pork or wild game such as bear meat, wild boar meat, or other carnivore or omnivore meat. The risk of developing infection is related to the amount of larvae ingested. About 10 larvae per gram of meat (muscle) ingested result in a mild infection, about 50-500 result in a moderate infection while over 1,000 result in a severe infection. Consequently, reducing or eliminating the number of larvae in infected meat reduces both the risk and severity of infection. This is accomplished by cooking meat to a uniform temperature of 70 degrees
Celsius (158 degrees Fahrenheit) or higher for at least a few minutes to kill encysted larvae. Freezing of pork meat to a temperature of -30 degrees
Celsius (-22 degrees Fahrenheit) for one week reportedly kills the encysted larvae. However, this freezing technique for wild game meat may not be effective, as
Trichinella in wild animals is usually not as susceptible to freeze killing. Other cooking methods such as microwaving, smoking, or salting meat often fail to kill the encysted larvae and thus the risk of getting
trichinosis from meat treated by these methods is increased.
Is trichinosis a common disease?
Trichinosis is a common disease in many wild carnivorous and omnivorous animals worldwide, except for Australia. Because of strict measures by the meat (pork) industry and public-health authorities, especially in developed countries, the incidence of disease in humans has dropped dramatically in the last few decades. For example, the United States has averaged only about 12-20 cases per year in the last two decades. However, there are outbreaks that occur sporadically in the world when meat (especially pork) is improperly cooked or is contaminated with undercooked or raw wild-game meat. If the source of the outbreak is a meat supplier, hundreds of people can be infected as was the situation that occurred in Poland in 2007.
Diarrhea is a change is the frequency and looseness of bowel movements. Cramping, abdominal pain, and the sensation of rectal urgency are all symptoms of diarrhea. Absorbents and anti-motility medications are used to treat diarrhea.
Nausea is an uneasiness of the stomach that often precedes vomiting. Nausea and vomiting are not diseases, but they are symptoms of many conditions. The causes of vomiting differ according to age, and treatment depends upon the cause of nausea and vomiting.
Itching can be a common problem. Itches can be localized or generalized. There are many causes of itching to include: infection (jock itch, vaginal itch), disease (hyperthyroidism, liver or kidney), reactions to drugs, and skin infestations (pubic or body lice). Treatment for itching varies depending on the cause of the itch.
Although a fever technically is any body temperature above the normal of 98.6 degrees F. (37 degrees C.), in practice a person is usually not considered to have a significant fever until the temperature is above 100.4 degrees F (38 degrees C.). Fever is part of the body's own disease-fighting arsenal: rising body temperatures apparently are capable of killing off many disease- producing organisms.
Vertigo is a feeling of spinning movement, and at times accompanied by nausea and vomiting occur. Vertigo is most often associated with an inner ear problem. The treatment for vertigo can be lifestyle changes and medication if necessary.
Food poisoning is common, but can also be life threatening. The most common form of food poisoning is caused by bacteria and include symptoms such as fever, abdominal pain, diarrhea, nausea and vomiting.
Epilepsy is a brain disorder in which the person has seizures. There are two kinds of seizures, focal and generalized. There are many causes of epilepsy. Treatment of epilepsy (seizures) depends upon the cause and type of seizures experienced.
Myocarditis is an inflammation of the heart muscle and can be caused by a variety of infections, conditions, and viruses. Symptoms of myocarditis include chest pain, shortness of breath, fatigue, and fluid accumulation in the lungs. Treatment mainly involves preventing heart failure with medication and diet, as well as monitoring for heart rhythm abnormalities.
Seizures are divided into two categories: generalized and partial. Generalized seizures are produced by electrical impulses from throughout the brain, while partial seizures are produced by electrical impulses in a small part of the brain. Seizure symptoms include unconsciousness, convulsions, and muscle rigidity.
Travelers should prepare for their trip by visiting their physician to get the proper vaccinations and obtain the necessary medication if they have a medical condition or chronic disease. Diseases that travelers may pick up from contaminated water or food, insect or animal bites, or from other people include malaria, meningococcal meningitis, yellow fever, hepatitis A, typhoid fever, polio, and cholera.
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