Category Archives: Vibrio

Research – Can Non-Toxigenic Vibrio cholerae Reduce a Cholera Infection?

CRIS Haifa


Vibrio cholerae, is the causative agent of cholera, that infects millions, annually. Chironomids are aquatic insects that host V. cholerae. Toxigenic strains produce cholera toxin (CT) which is the main virulence factor that causes cholera symptoms. In contrast to other bacterial pathogens, V. cholerae produces CT when at low cell densities while hemagglutinin/protease (HAP) is a high cell density-controlled gene. When V. cholerae behavior was examined on chironomids, we showed that high cell densities of non-toxigenic strains, increased HAP production in a toxigenic strain, conditions which could also potentially reduce CT production. Here we propose the value of studies that could support the potential of V. cholerae non-toxigenic strains to repress virulence gene expression in cholera-infected humans. High cell densities of a non-toxigenic strain present in an infected individual, may down-regulate CT expression, reducing cholera symptoms. To further test the hypothesis supported by a chironomid model, additional experiments in animal models are first needed.

RASFF Alert – Vibrio cholerae – Prawns


Vibrio cholerae in prawns from Ecuador in Spain

South Africa – Cholera Outbreak Claims 10 Lives In South Africa As 1 Billion Remain At Risk Globally


Food Illness


  • 10 people, including a 3-year-old child, died in Gauteng Province
  • Cholera can be mild in some patients, but deadly in others
  • UN last week said about one billion people in 43 countries are at risk of cholera

A cholera outbreak in South Africa has claimed the lives of 10 people. The infection is not endemic to the region and it has seen a surge in cases globally in recent years.

The announcement from officials in Gauteng Province comes after samples of 19 people with symptoms at a hospital were confirmed for cholera, the Gauteng Department of Health (GDoH) noted in a statement Sunday.

At least 95 people have shown similar symptoms like diarrhea, stomach cramps and nausea since May 15. Thirty-seven people remain at the hospital, while 10 have died, which includes nine adults and a 3-year-old.

RASFF Alert- Vibrio – Shrimp


Vibrio in Blue Moon Frozen Shrimp from Ecuador in Ireland

Ireland – Recall of a batch of Full Moon Frozen Shrimp due to the presence of Vibrio


Alert Summary
Category 1: For Action
Alert Notification: 2023.12
Product Identification: Full Moon Raw Frozen Shrimp; pack size: 2kg
Batch Code 29936030; ​​​​​​​Best before: 01/03/2025
Country Of Origin: Ecuador


The above batch of Full Moon Raw Frozen Shrimp is being recalled due to the presence of Vibrio cholera and Vibrio parahaemolyticus.
Recall notices will be displayed at point-of-sale.

Nature Of Danger:

Symptoms typically include nausea, vomiting, abdominal cramps, fever, headache, and watery diarrhoea (which may be bloody or contain flecks of mucus). Symptoms generally start within 6 to 48 hours and usually last between three to five days. However, depending on the species of Vibrio, symptoms may persist for up to 3 weeks. In some people, particularly children under 5 years of age, the elderly, or those with underlying health conditions, the infection can lead to severe dehydration, which may be fatal if not treated promptly.

Action Required:

Manufacturers, wholesalers, distributors, caterers & retailers:

Retailers are requested to remove the implicated batch from sale and display recall notices at point of sale.


Consumers are advised not to eat the implicated batch.

Research – Scientists Discover How Foodborne Vibrio Infects People, Could Lead to New Treatments

Food Safety.Com

Food Illness

Researchers at the University of Texas (UT) Southwestern Medical Center have discovered how foodborne pathogen Vibrio parahaemolyticus infects people after eating raw or undercooked shellfish. The findings could lead to new ways to treat illness caused by the enteric bacteria.

The study provides the first visual evidence of how a gut bacterial pathogen uses an “assembly method” to build syringe-like structures to inject toxins into intestinal cells, giving a new view of how enteric bacteria, when exposed to bile acids, efficiently respond and build a virulence system.

RASFF Alerts – Vibrio cholerae- Shrimps from Ecuador


Vibrio cholerae in shrimps from Ecuador in Spain


Vibrio cholerae in shrimps from Ecuador in Spain

RASFF Alert- Vibrio cholerae – Shrimp


Vibrio cholerae in Penaeus (Litopenaeus) vannamei from Ecuador in Spain

Nigeria – 79 died from 1,336 cases of cholera: NCDC


The Nigeria Centre for Disease and Prevention Control (NCDC) has registered 79 deaths and a total of 1,336 suspected cases of cholera in the country so far in 2023.

The NCDC, via its official website, said this in its latest cholera situation epidemiological report.

Cholera is an acute diarrheal illness caused by infection of the intestine with Vibrio cholera bacteria.

People can get sick when they swallow food or water contaminated with cholera bacteria. The infection is often mild or without symptoms but can sometimes be severe and life-threatening.

The agency said 12 states across 43 local government areas reported the suspected cases, with a case fatality ratio of 5.9 per cent.

RASFF Alert- Vibrio parahaemolyticus – Shrimps


Presence of vibrio parahaemolyticus in frozen aquaculture shrimps from Ecuador in Greece