1.3 Foodborne Pathogens & Employee Hygiene

Foodborne Pathogens & Employee Hygiene

Core Principle: The health and hygiene of food workers are critical lines of defense. Humans are primary vectors for many severe foodborne illnesses, meaning strict health policies and handwashing protocols are non-negotiable.

Personal hygiene and employee health management are heavily emphasized in the FDA Food Code because human behavior is a leading contributor to foodborne disease outbreaks. A sanitarian must ensure that the Person In Charge (PIC) understands their responsibilities in monitoring employee health, reporting illnesses, and enforcing hygiene standards.

The "Big 6" Pathogens

The FDA identifies six highly infectious pathogens that have a remarkably low infectious dose and are frequently transmitted by food workers. Known as the "Big 6," these pathogens demand immediate intervention when an employee is diagnosed. Employees diagnosed with any of these must be reported to the regulatory authority.

1. Norovirus: The leading cause of foodborne illness in the United States. It is extremely contagious and often linked to ready-to-eat foods and shellfish. The incubation period is typically 12-48 hours. Symptoms include projectile vomiting, watery diarrhea, and nausea.
2. Hepatitis A: A viral infection that attacks the liver. It is often transmitted via the fecal-oral route from infected workers handling ready-to-eat food. The incubation period is long, ranging from 15-50 days. Symptoms include jaundice (yellowing of the skin and eyes), dark urine, and profound fatigue.
3. Shigella spp.: A bacterium transmitted via the fecal-oral route, often linked to contaminated water, flies, and foods requiring extensive handling (e.g., potato salad, tuna salad, macaroni salad). The incubation period is 1-7 days. Symptoms include bloody diarrhea, abdominal cramps, and fever.
4. Shiga toxin-producing E. coli (STEC): Found naturally in the intestines of cattle. Outbreaks are commonly linked to undercooked ground beef and contaminated produce. The incubation period is 1-10 days. Symptoms include severe bloody diarrhea and severe abdominal pain. It can lead to Hemolytic Uremic Syndrome (HUS), a life-threatening kidney condition.
5. Salmonella Typhi: The bacterium that causes Typhoid fever. It lives only in humans and is transmitted via the fecal-oral route, often linked to ready-to-eat foods and beverages. The incubation period is 1-3 weeks. Symptoms include a high, sustained fever, weakness, rose spots (rash), and abdominal pain.
6. Nontyphoidal Salmonella: A bacterium found in many farm animals. Illness is linked to poultry, raw shell eggs, meat, and dairy products. The incubation period is 6-72 hours. Symptoms include diarrhea, abdominal cramps, vomiting, and fever.

Employee Health Policies: Exclusions vs. Restrictions

Food establishments must implement a formal employee health policy. The Person In Charge (PIC) is responsible for ensuring employees understand their duty to report specific illnesses and symptoms. Based on the symptoms or diagnosis, the PIC must apply restrictions or exclusions.

Exclusion

An exclusion means the employee is entirely barred from entering the food establishment in any capacity. Exclusions are mandatory if an employee:

• Is diagnosed with an infection from any of the Big 6 pathogens.
• Exhibits jaundice (often a clear indicator of Hepatitis A). If an employee has had jaundice for less than 7 days, they must be excluded and reported.
• Is experiencing active vomiting or diarrhea. They cannot return to work until they have been symptom-free for at least 24 hours without the use of medication, or they provide a written medical clearance.

Restriction

A restriction means the employee is permitted to work in the facility, but they are prohibited from handling exposed food, clean equipment, utensils, or linens. They may perform tasks like stocking sealed packages or administrative work. Restrictions are mandatory if an employee:

• Has a sore throat with a fever.
  • Crucial Exception: If the establishment serves a Highly Susceptible Population (HSP)—such as residents of nursing homes, hospital patients, or children in daycares—an employee with a sore throat and a fever must be excluded, not merely restricted.
• Has an uncovered infected wound, lesion, or boil on their hand, wrist, or exposed portion of their arm. To lift the restriction, wounds on the hands or wrists must be covered with an impermeable bandage (like a finger cot) AND a single-use glove before the employee can resume handling food.

Handwashing Protocols

Handwashing is the most critical personal hygiene intervention in food safety. The FDA Food Code dictates strict requirements for how and where hands are washed to ensure soil and transient microorganisms are effectively removed.

The Procedure

The entire handwashing process must take at least 20 seconds.

1. The worker must wet their hands with clean, warm running water.
2. Apply an adequate amount of soap.
3. Vigorously rub hands, wrists, and exposed lower arms for 10 to 15 seconds, paying special attention to the areas under the fingernails and between the fingers.
4. Rinse thoroughly under clean, running warm water.
5. Dry hands using a single-use paper towel or an approved heated air dryer. (Using a paper towel to turn off the faucet is a recommended best practice to prevent recontamination).

Sink Requirements and Restrictions

• Water Temperature: Water at the handwashing sink must be capable of reaching at least 100°F (38°C) through a mixing valve or combination faucet.
• Designated Use: Handwashing sinks must be designated exclusively for washing hands. They cannot be used for washing produce, thawing meat, washing utensils, or dumping mop water.
• Accessibility: Sinks must remain unobstructed and easily accessible to employees at all times. They must be fully stocked with hand soap, drying provisions, and a trash receptacle.

When to Wash

Employees must wash their hands frequently, specifically:

• Before starting work and before donning new single-use gloves.
• After using the restroom, eating, drinking, or smoking.
• After coughing, sneezing, or touching their face or hair.
• After handling raw meat, poultry, or seafood.
• After handling garbage, soiled equipment, or dirty utensils.
• Whenever moving from a raw food prep task to a ready-to-eat food prep task.

Hand antiseptics (hand sanitizers) may only be used after proper handwashing; they are never a substitute for handwashing.