Legionellosis is a respiratory disease caused by the Legionella pneumophilia bacteria, and may manifest itself in two different ways. Pontiac fever, the milder condition, is a...

Histoplasma capsulatum is a dimorphic fungus that grows as a mold in soil, and as a yeast in humans and animals. The fungus is found in nature in soil with undisturbed droppings...

Hepatitis B is caused by infection with the Hepatitis B virus (HBV). The incubation period from the time of exposure to onset of symptoms is 6 weeks to 6 months. HBV is found in...

Hepatitis A is an acute, severe illness with a distinct onset of symptoms consistent with any acute viral hepatitis. The most distinctive symptom is jaundice, a yellowish...

Cryptosporidiosis is a disease caused by ingesting or swallowing the intestinal parasite Cryptosporidium parvum. Watery diarrhea and abdominal cramping are the most common major...

Hepatitis C virus (HCV) infection is the most common chronic bloodborne infection in the United States; approximately 3.2 million persons are chronically infected. HCV is most...