Cholera : is a bacterial disease usually spread through contaminated water. Cholera causes severe diarrhea and dehydration. Left untreated, cholera can be fatal in a matter of hours even in previously healthy people.
Treatment
• Rehydration. The goal is to replace lost fluids and electrolytes using a simple rehydration solution, Oral Rehydration Salts (ORS). The ORS solution is available as a powder that can be reconstituted in boiled or bottled water. Without rehydration, approximately half the people with cholera die. With treatment, the number of fatalities drops to less than 1 percent.
• Intravenous fluids. During a cholera epidemic, most people can be helped by oral rehydration alone, but severely dehydrated people may also need intravenous fluids.
• Antibiotics. While antibiotics are not a necessary part of cholera treatment, some of these drugs may reduce both the amount and duration of cholera-related diarrhea. A single dose of doxycycline (Adoxa, Monodox) or azithromycin (Zithromax, Zmax) may be effective.
• Zinc supplements. Research has shown that zinc may decrease and shorten the duration of diarrhea in children with cholera.
Giardiasis : Giardiasis (popularly known as beaver fever is a parasitic disease caused by the flagellate protozoan Giardia lamblia (also sometimes calledGiardia intestinalis and Giardia duodenalis).
Treatment is not always necessary as the infection usually resolves by itself. But in others, the illness is acute or symptoms persist and medications are needed to treat it. Usuallymetronidazole, albendazole, and tinidazole are used.