Topic 1: Personal Hygiene & Health

Personal hygiene is the foundation of food safety. Every food handler must understand proper handwashing, appropriate work attire, and when to report illness. Regulatory agencies consider poor personal hygiene one of the leading causes of foodborne illness outbreaks in restaurants and food service establishments.

Proper Handwashing Procedure

The correct handwashing procedure involves 5 steps and must take at least 20 seconds of scrubbing time. First, wet your hands with warm running water (at least 100°F / 38°C). Apply soap and scrub all surfaces including between fingers, under nails, and up to the wrists. Scrub vigorously for a minimum of 20 seconds. Rinse thoroughly under clean running water. Dry with a single-use paper towel or air dryer.

When to Wash Hands

Food handlers must wash hands: before starting work, before putting on gloves, after touching raw meat or poultry, after using the restroom, after sneezing or coughing, after touching hair or face, after handling garbage, after handling chemicals, after eating or drinking, and when switching between tasks. Changing gloves without washing hands first is a common violation.

Proper Attire & Hair Restraints

Food handlers must wear clean clothing, remove jewelry (except plain wedding bands in most jurisdictions), and use effective hair restraints such as hats, hairnets, or beard guards. Aprons should be removed before leaving the food preparation area. Fingernails must be kept short, clean, and unpolished — or covered with single-use gloves if artificial nails are worn.

Illness Reporting & the Big 5 Illnesses

Food handlers must report illness symptoms to their manager, especially vomiting, diarrhea, jaundice, sore throat with fever, and infected wounds. The Big 5 foodborne illnesses that must be reported are:

• Salmonella Typhi (Typhoid Fever)
• Shigella spp.
• Norovirus
• Hepatitis A
• E. coli O157:H7 (STEC)

A food handler diagnosed with any Big 5 illness must be excluded from the establishment until cleared by a healthcare provider. Wounds must be properly bandaged and covered with a glove or finger cot.

Topic 2: Time & Temperature Control

Controlling time and temperature is essential for preventing bacterial growth in food. Bacteria multiply rapidly in the Temperature Danger Zone, which ranges from 41°F to 135°F (5°C to 57°C). Understanding proper cooking, holding, cooling, and reheating temperatures is critical for the exam.

The Temperature Danger Zone

The danger zone is 41°F to 135°F. Within this range, bacteria can double in number every 20 minutes. Food should not remain in the danger zone for more than 4 hours total (cumulative time). This is the basis for TPHC (Time as a Public Health Control) protocols.

Minimum Internal Cooking Temperatures

Different foods require different minimum internal cooking temperatures held for specific times:

• Poultry (chicken, turkey, duck): 165°F for 15 seconds
• Ground meats (beef, pork): 155°F for 15 seconds
• Pork, fish, eggs, steaks: 145°F for 15 seconds
• Fruits, vegetables, grains, legumes (hot holding): 135°F

Hot Holding & Cold Holding

Hot holding must maintain food at 135°F or above. Cold holding must keep food at 41°F or below. Check temperatures every 2 hours using a calibrated food thermometer. Stir hot foods regularly to maintain even temperatures. Never use hot-holding equipment to reheat food — it is designed only to maintain temperature.

Two-Stage Cooling Method

When cooling hot food, use the two-stage cooling method: cool from 135°F to 70°F within 2 hours, then from 70°F to 41°F within an additional 4 hours (total cooling time: 6 hours). If food has not reached 70°F within 2 hours, it must be reheated to 165°F and the cooling process restarted. Techniques include ice baths, blast chillers, shallow pans, and ice paddles.

Reheating & TCS Foods

All previously cooked food that will be hot-held must be reheated to 165°F within 2 hours. TCS (Time/Temperature Control for Safety) foods include meat, dairy, eggs, cooked rice, cut melons, sprouts, tofu, and garlic-in-oil mixtures. These foods require strict temperature control because they support rapid bacterial growth.

Topic 3: Cross-Contamination Prevention

Cross-contamination occurs when harmful bacteria or allergens are transferred from one food, surface, or object to another. It is one of the most common causes of foodborne illness and a major focus of the food handler exam. Prevention requires strict protocols for food storage, preparation, and equipment handling.

What Is Cross-Contamination?

Cross-contamination is the transfer of harmful microorganisms from one substance or object to another. The three main types are: food-to-food (raw chicken dripping onto lettuce), equipment-to-food (cutting vegetables on an unwashed board used for raw meat), and person-to-food (handling food with unwashed hands). Each type requires specific preventive measures.

Color-Coded Cutting Boards

Many commercial kitchens use color-coded cutting boards to prevent cross-contamination:

• Red: Raw meat
• Yellow: Raw poultry
• Blue: Raw fish/seafood
• Green: Fruits and vegetables
• White: Dairy and bread
• Brown: Cooked meats

Proper Storage Order in the Refrigerator

Store food in the refrigerator from top to bottom in this order based on required cooking temperature (lowest to highest):

• Top shelf: Ready-to-eat foods (salads, desserts, fruits)
• Second shelf: Whole fish and seafood (145°F)
• Third shelf: Whole cuts of beef and pork (145°F)
• Fourth shelf: Ground meats (155°F)
• Bottom shelf: Poultry (165°F)

Preventing Cross-Contamination in the Kitchen

Key prevention steps include: wash, rinse, and sanitize cutting boards and utensils between tasks; use separate prep areas for raw and ready-to-eat foods; never place cooked food on a surface that held raw food without cleaning first; store raw meats below ready-to-eat foods; use separate utensils for tasting; and change gloves between handling different food types. Always clean and sanitize work surfaces between tasks.

Topic 4: Food Allergens

Food allergies affect millions of people and can cause severe, life-threatening reactions. Food handlers must know the major allergens, understand cross-contact, and communicate effectively with customers about allergen-containing menu items. The FDA updated the list to include sesame as the 9th major allergen in 2023.

The Big 9 Food Allergens

Federal law recognizes 9 major food allergens (updated with sesame added in 2023):

1. Milk
2. Eggs
3. Fish (e.g., bass, flounder, cod)
4. Crustacean Shellfish (e.g., crab, lobster, shrimp)
5. Tree Nuts (e.g., almonds, walnuts, cashews)
6. Peanuts
7. Wheat
8. Soybeans
9. Sesame (added 2023)

Symptoms & Anaphylaxis

Allergic reactions can range from mild (hives, itching, swelling) to severe anaphylaxis, which is life-threatening and requires immediate treatment with epinephrine (EpiPen). Symptoms include difficulty breathing, swelling of the throat, rapid pulse, dizziness, and loss of consciousness. Food handlers should call 911 immediately and never try to treat anaphylaxis without proper medical equipment.

Cross-Contact vs. Cross-Contamination

Cross-contact occurs when an allergen is transferred to a food that does not normally contain that allergen. Unlike cross-contamination, allergens cannot be destroyed by cooking. For example, using the same fryer oil for shrimp and french fries causes cross-contact. Prevention requires separate equipment, thorough cleaning, and dedicated preparation areas for allergen-free meals.

Customer Communication & Label Reading

Food handlers must take every allergen request seriously. When a customer reports an allergy, the server should inform the kitchen immediately, check ingredient labels, confirm with the chef, and clearly communicate what is safe. Read labels carefully for hidden allergens — whey and casein indicate milk; albumin indicates eggs; semolina indicates wheat. Never guess whether a dish contains an allergen.

Topic 5: Cleaning & Sanitizing

Cleaning removes visible dirt and food particles, while sanitizing reduces harmful microorganisms to safe levels. Both steps are required — one does not replace the other. Understanding the difference and knowing proper methods and concentrations is essential for the food handler exam.

Cleaning vs. Sanitizing

Cleaning uses soap and water to remove food, dirt, and grease from surfaces. Sanitizing uses heat or chemicals to reduce microorganisms to safe levels. The correct order is always: scrape/rinse, wash, rinse, sanitize, air dry. Surfaces must be cleaned before they can be sanitized — sanitizer cannot penetrate grease or food buildup.

The 3-Compartment Sink Method

The 3-compartment sink is used for manually washing dishes and equipment:

1. Sink 1 — Wash: Hot soapy water (at least 110°F)
2. Sink 2 — Rinse: Clean warm water
3. Sink 3 — Sanitize: Chemical sanitizer solution at proper concentration OR hot water at 171°F for 30 seconds

After sanitizing, items must be air dried on a clean rack. Never towel-dry sanitized items, as towels can reintroduce bacteria.

Sanitizer Types & Concentrations

Three chemical sanitizers are commonly used in food service:

• Chlorine (bleach): 50–100 ppm concentration, water temperature at least 75°F, contact time 7 seconds
• Quaternary Ammonium (quat): 200 ppm concentration, water temperature at least 75°F, contact time 30 seconds
• Iodine: 12.5–25 ppm concentration, water temperature at least 68°F, contact time 30 seconds

Always use test strips specific to the sanitizer type to verify concentration. Too little sanitizer is ineffective; too much can be toxic. Follow manufacturer instructions and never mix different sanitizer types. Replace sanitizer solution when it becomes visibly dirty or when concentration drops below the required minimum.