t pain usually lasting 3-7
days, some cases result in persistent arthritis.
water contact diseases acquired through swimming or wading in
freshwater lakes, streams, and rivers:
Leptospirosis - bacterial disease that affects animals and humans;
infection occurs through contact with water, food, or soil contaminated
by animal urine; symptoms include high fever, severe headache,
vomiting, jaundice, and diarrhea; untreated, the disease can result in
kidney damage, liver failure, meningitis, or respiratory distress;
fatality rates are low but left untreated recovery can take months.
Schistosomiasis - caused by parasitic trematode flatworm Schistosoma;
fresh water snails act as intermediate host and release larval form of
parasite that penetrates the skin of people exposed to contaminated
water; worms mature and reproduce in the blood vessels, liver, kidneys,
and intestines releasing eggs, which become trapped in tissues
triggering an immune response; may manifest as either urinary or
intestinal disease resulting in decreased work or learning capacity;
mortality, while generally low, may occur in advanced cases usually due
to bladder cancer; endemic in 74 developing countries with 80% of
infected people living in sub-Saharan Africa; humans act as the
reservoir for this parasite.
aerosolized dust or soil contact disease acquired through inhalation of
aerosols contaminated with rodent urine:
Lassa fever - viral disease carried by rats of the genus Mastomys;
endemic in portions of West Africa; infection occurs through direct
contact with or consumption of food contaminated by rodent urine or
fecal matter containing virus particles; fatality rate can reach 50% in
epidemic outbreaks.
respiratory disease acquired through close contact with an infectious
person:
Meningococcal meningitis - bacterial disease causing an inflammation of
the lining of the brain and spinal cord; one of the most important
bacterial pathogens is Neisseria meningitidis because of its potential
to cause epidemics; symptoms include stiff neck, high fever, headaches,
and vomiting; bacteria are transmitted from person to person by
respiratory droplets and facilitated by close and prolonged contact
resulting from crowded living conditions, often with a seasonal
distribution; death occurs in 5-15% of cases, typically within 24-48
hours of onset of symptoms; highest burden of meningococcal disease
occurs in the hyperendemic region of sub-Saharan Africa known as t