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Below is an example of a Red Tide sign that is posted at Sarasota Beaches.

Image of Red Tide Sign


Bacteria

Main Administrative Office

Below is an example of a "No Swim" Advisory sign that is posted at various Sarasota County Beaches.

Example of a Red Tide Sign


Enteric Bacteria 

Enteric bacteria water test results

(Note: Results for enterococcus are given in “CFU”, or “colony forming units” and a number of 71 or greater is considered “poor”.)


Location

Date
Enterococci,
CFU/mL
Swim
Advisory
Longboat Key 10/08/2018 188 Yes
Bird Key Park 10/08/2018 20 No
North Lido Beach 10/08/2018 >800 Yes
Lido Beach(Casino) 10/08/2018 >800 Yes
South Lido Park 10/08/2018 124 Yes
Siesta Key 10/08/2018 212 Yes
Turtle Beach 10/08/2018 120 Yes
Nokomis Beach 10/08/2018 316 Yes
North Jetty 10/08/2018 168 Yes
Venice Beach 10/08/2018 64 No
Service Club Park 10/08/2018 196 Yes
Venice Fishing Pier 10/08/2018 448 Yes
Brohard Beach 10/08/2018 188 Yes
Caspersen Beach 10/08/2018 136 Yes
Manasota Beach 10/08/2018 140 Yes
Blind Pass 10/08/2018 44 No


Enterococcus (CFU per 100 ml)
Good Moderate Poor
0-35 36-70 71 or greater


Enterococcus (CFU per 100 ml)
Good Moderate Poor
0-35 36-70 71 or greater


Water samples are tested for elevated levels of ‘indicator’ bacteria. These are known as enterococcus or enteric bacteria, some of which are naturally present in the environment. These bacteria are known to inhabit the intestines of humans and warm-blooded animals.

Enteric bacteria can come from a variety of sources, including stormwater runoff, pet waste and wildlife and human sewage from failed septic systems and sewage spills.

Health Risks

When these enteric bacteria are detected in high concentrations in recreational waters, there is a risk of illness and infections. Some people who swallow water while swimming or have contact with water entering the skin through a cut or sore may become ill with gastrointestinal illnesses, infections or rashes.  

Vibrio vulnificus

Vibrio vulnificus is another type of bacteria. It is naturally occurring. The Florida Department of Health (DOH) does not sample for this bacteria because it is commonly found in warm, brackish and sea water and in shellfish, especially during the summer months.

DOH is constantly monitoring reportable diseases and has appropriate ways to alert the public if needed.

News reports have incorrectly characterized Vibrio vulnificus as a flesh-eating bacteria. It is important to know that there is no such medical term or marine organism.

Infection by Vibrio vulnificus is a rare but serious disease. It is caused by eating raw or undercooked shellfish, particularly oysters or by exposing cuts and wounds to brackish and salt water where the bacteria exists.

The breakdown of the skin known as necrotizing fasciitis is very rare and is most commonly associated with Group A Strep infections, not Vibrio vulnificus.

Millions of people visit Suncoast beaches each year. If you are healthy, have a strong immune system, and practice good hygiene and proper wound care, your chances of getting necrotizing fasciitis is extremely low.

You can download informational articles provided by DOH about vibrio here:

DOH Fact Sheet[PDF 116KB]

Tips for a Healthy and Fun Day at the Beach[PDF 161KB]

For additional information, please visit the CDC website shown below.

Additional Information about Vibrio vulnificus: Centers for Disease Control and Prevention (CDC): http://www.cdc.gov/vibrio/vibriov.html