What makes E. coli O157:H7 so dangerous?

O157:H7 produces Shiga toxin, which damages blood vessel linings, especially in kidneys and brain. About 5-10% of infections lead to hemolytic uremic syndrome (HUS)—a form of kidney failure. HUS is most common in children under 5 and can cause permanent kidney damage, brain damage, or death. This is why prompt diagnosis and avoiding anti-diarrheal medications are critical.

What is hemolytic uremic syndrome (HUS)?

HUS is a life-threatening complication where Shiga toxin destroys red blood cells and blocks kidney filtration. Symptoms: decreased urination, blood in urine, pale skin, extreme fatigue, irritability, small unexplained bruises. HUS requires hospitalization with blood transfusions and dialysis. Most children recover, but 12% have permanent kidney damage and 3-5% die.

Should I take anti-diarrheal medicine for E. coli?

NO. Anti-diarrheal medications (Imodium) may increase risk of HUS by slowing gut motility and allowing more toxin absorption. Antibiotics are also controversial—some studies suggest they may increase HUS risk by causing bacteria to release more toxin when dying. Seek medical evaluation rather than self-treating with medications.

What foods cause E. coli O157:H7?

Ground beef is the most common source (bacteria from cow intestines mixed during grinding). Also: raw milk, unpasteurized juice, raw vegetables (lettuce, sprouts), contaminated water, person-to-person in daycare/nursing homes. Whole cuts of beef are safer (bacteria only on surface, killed by cooking). Ground beef must reach 160°F throughout.

When should I see a doctor for E. coli?

Seek immediate medical care for: bloody diarrhea, severe stomach cramps, diarrhea lasting >3 days, fever >101.5°F, vomiting preventing fluid retention, signs of dehydration, or decreased urination (especially in children). Early recognition of HUS can be lifesaving. Children, elderly, and immunocompromised should seek care sooner.

How long does E. coli illness last?

Symptoms typically appear 3-4 days after exposure (range 1-10 days). Illness lasts 5-10 days in uncomplicated cases. However, bacteria can be shed in stool for weeks after recovery, requiring good hygiene to prevent spread. HUS typically develops 5-10 days after diarrhea starts.

Pennsylvania

E. coli in Pennsylvania

E. coli (Escherichia coli) are bacteria found in intestines. While most strains are harmless, some cause severe food poisoning with bloody diarrhea. The most dangerous strain, E. coli O157:H7, produces toxins causing kidney failure, especially in children.

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Qu'est-ce que E. coli?

Most E. coli strains are part of healthy gut flora. However, Shiga toxin-producing E. coli (STEC), particularly O157:H7, cause approximately 265,000 illnesses annually in the U.S. About 5-10% of diagnosed cases develop hemolytic uremic syndrome (HUS), a life-threatening kidney condition. Undercooked ground beef, contaminated produce, and unpasteurized dairy are common sources.

Symptômes

Severe stomach cramps
Diarrhea (often bloody)
Vomiting
Mild fever (usually <101°F)
Symptoms last 5-10 days
HUS warning signs: Decreased urination, extreme fatigue, pale skin, bruising

Transmission

Eating contaminated food (ground beef, raw produce, unpasteurized dairy); contaminated water; person-to-person (poor hygiene); contact with infected animals

Période de Contagiosité : While bacteria present in stool (can persist weeks after recovery); requires good hygiene

Prévention

Cook ground beef to 160°F (use food thermometer)
Avoid raw milk, unpasteurized juice, and raw cookie dough
Wash hands thoroughly after bathroom, changing diapers, before preparing food
Wash fruits and vegetables under running water
Avoid cross-contamination (separate raw meat from produce)
Don't swallow water when swimming in lakes, pools, or water parks
Keep children with diarrhea out of swimming areas and daycare
Avoid preparing food for others when ill

Pennsylvania Ressources Santé

Informations du département de santé local et directives de prévention spécifiques à l'état

Nous Surveillons Pennsylvania

Notre surveillance alimentée par IA surveille en continu l'activité de E. coli dans tout Pennsylvania. Nous suivons les données des services de santé des états, des hôpitaux locaux, des rapports du CDC et de plus de 50 sources de santé mondiales pour fournir une alerte précoce sur les menaces émergentes.

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Pennsylvania Département de Santé

Pour les alertes officielles de santé de l'état, les lieux de vaccination et les directives de santé publique spécifiques à Pennsylvania, visitez le site web du département de santé de votre état.

→ Pennsylvania Département de Santé → CDC E. coli Information → CDC Health Topics

Understanding E. coli: Key Questions

Que vous viviez dans Pennsylvania or are traveling there, knowing the symptoms, timeline, and when to seek care helps you act quickly if exposure occurs.

Quand Consulter un Médecin

Seek care if you experience severe dehydration, bloody stools, high fever, or symptoms lasting more than 3 days. Children under 5, adults over 65, and immunocompromised individuals should seek care earlier.

Symptômes d'urgence : Severe dehydration, inability to keep fluids down for 12 or more hours, or neurological symptoms require emergency care.

Ressources Expertes et Références

Informations fiables provenant des principales organisations de santé

CDC

Directives officielles des Centers for Disease Control and Prevention des États-Unis

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WHO

Surveillance mondiale des maladies et directives de l'Organisation Mondiale de la Santé

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Recherche

Dernières recherches évaluées par les pairs et études cliniques

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Contenu Révisé Médicalement

Les informations sur les maladies sur Virus Watcher sont révisées par notre Épidémiologiste en Chef, ancien analyste principal du CDC pour les prévisions FluSight. Les données épidémiques sont agrégées à partir de sources vérifiées notamment BEACON, ProMED, OMS, CDC et plus de 50 agences nationales de santé. Ces informations sont à des fins éducatives et ne doivent pas remplacer les conseils médicaux professionnels.

Dernière révision : 2026-08-13

Recent E. coli Reports

No confirmed cases reported in Pennsylvania yet. Here are the latest E. coli reports from our global surveillance network.

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Greece · 2026-08-01

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