W. David Colby IV MSc MD FRCPC


Salmonella

Salmonella bacteria are commonly found in the intestines of birds, reptiles, and mammals. The bacteria can spread to humans from handling waste from infected animals or consuming undercooked meat, juice from raw meats, or other contaminated foods. The illness caused by salmonella—salmonellosis—produces fever, diarrhea…

E. Coli Infection From Food or Water

What is an E. coli infection? E. coli ( Escherichia coli ) is the name of a germ, or bacterium, that lives in the digestive tracts of humans and animals. There are many types of E. coli, and most of them are harmless. But some can cause bloody diarrhea. Some strains of E. coli bacteria may also cause severe anemia or…

Colorado Tick Fever

Colorado tick fever is an infectious viral disease that can be passed to humans by ticks. Colorado tick fever occurs in the mountain region of the western United States. Symptoms usually start within 14 days (average of 3 to 6 days) of the tick bite. Symptoms of Colorado tick fever include: Fever and chills. Headache…

Tuberculosis Screening

All cases of tuberculosis (TB) are reported to the local or state health department, because the disease can spread to others and cause outbreaks. Major health authorities keep track of TB outbreaks and encourage early testing for people who are at risk for the disease. The CDC recommends TB testing for people who: 1…

Lyme Disease Rash

One symptom of Lyme disease is a red rash (called erythema migrans). The rash usually starts as a small red area and then expands over several days. The rash occurs at the site of the tick bite and usually gets bigger over time. Sometimes the rash clears in the center, so that it looks like a bull’s-eye. About half the…