1. Vibrio vulnificus - a naturally occurring bacteria found in warm coastal waters.
Precautionary advisory: Individuals with weakened immune systems and anyone with open sores or wounds should avoid going into the water; avoid eating raw or undercooked shellfish (oysters, etc.)
Excerpt from Miami Herald
Mysterious Ocean Bacteria Can Be Harmful
Contrary to popular belief, wading in the ocean to heal cuts and scrapes isn't always the best idea.
A little-known, deadly bacteria called Vibrio vulnificus, which naturally occurs in warm coastal waters, can infect the open wounds of beachgoers and incite a life-threatening illness in those with weakened immune systems.
Between 2005 and 2009, 138 people were infected with the bacteria in Florida -- 31 died, according to the Florida Department of Health.
``The high mortality rate makes it a big deal,'' said Juan A. Suarez, a regional environmental epidemiologist for FDH, who said the bacteria proliferates in waters where temperature and salinity are increasing, particularly between the months of April and November.
There are two main ways of contracting an infection from the bacteria: Through direct contact between sea water and an open cut or by consuming raw or undercooked shellfish, particularly contaminated oysters.
In Miami-Dade County, there have been two Vibrio vulnificus deaths in the past five years."
Short description via http://www.ask.com/wiki/Vibrio_vulnificus:
Beach Goers Beware of Ocean Bacteria
Medhelp Video: Dangerous Bacteria Could Be In Ocean Water
2. Nagleria Amoeba - a parasite found in warm or hot stagnant water and soil, often in the Southern states and gulf regions
This parasite can enter the human body through the nose and travel to the brain and almost always results in fatality.
Boy Dies After Contracting Ameoba During Camping Trip
Vibrio vulnificus is a naturally occurring bacterium in the same family as those that cause cholera. Vv can be found in warm coastal waters, especially the Gulf of Mexico between the months of April a...
lives inside oysters harvested from warm coastal waters, such as the Gulf of Mexico.
･ 1 Recognize symptoms of V. Vulnificus, which include: Fever, red skin, painful skin lesions (necrotic... ･ 2 Monitor the patient's blood pressure. A patient with Vibrio Vulnificus will experience a ..
Vibrio vulnificus causes an infection often incurred after eating seafood, especially raw or undercooked oysters; the bacteria can also enter the body through open wounds when swimming or wading in infected waters, or via puncture wounds from the spines of fish such as tilapia.
Symptoms include vomiting, diarrhea, abdominal pain, and a blistering dermatitis that is sometimes mistaken forpemphigus or pemphigoid.