Food Safety Exam : Real Exam Questions & Answers – Foodborne Illness, Pathogens, Dairy, Beef, Poultry, Aquaculture & Animal Welfare

Pass your Food Safety Exam 1 with this comprehensive study guide for the academic year. This document contains real exam-style questions and verified answers covering all essential food safety concepts, including foodborne pathogens, outbreak case studies, food production systems, and regulatory agencies. What’s Included – Complete Content Coverage: Food Safety Fundamentals & Agencies: Protecting the nation's food supply – FDA, CDC, and USDA all play roles. NCAA does NOT have a role in food safety. Majority of foodborne illnesses are due to biological contaminants (bacteria, viruses, parasites). Food establishments include hospitals, child care centers, airplanes, hotels, supermarkets. Most foodborne illnesses are mild. Food safety is assurance that food will not cause harm when prepared according to intended use (unintentional contamination). Food security exists when all people have physical, social, and economic access to safe, sufficient, nutritious food. Food hygiene = safety + suitability. Major Foodborne Outbreaks & Case Studies: Jack in the Box outbreak (E. coli O157:H7) – killed 4 people, birthplace of food-related injury litigation, caused by undercooked hamburger and temperature abuse; led to warning labels on menus for raw/undercooked meat. Mad cow disease (BSE) in UK – claimed 226 lives as of 2012. Peter Pan outbreak – probably caused by a leaky roof (True). Jensen Farms cantaloupe outbreak – deadliest foodborne outbreak in past 25 years (True – Listeria). Criminal charges filed in both PCA and Jensen Farms outbreaks (True). ChiChi's outbreak – implicated green onions. PCA peanut outbreak – peanuts responsible for two large outbreaks discussed in lecture. Pathogens & Diseases: E. coli O157:H7 – antibiotics exacerbated kidney failure (True). Listeria – caused deadliest foodborne outbreak in last 25 years. Vibrio – pathogen that increased in 2015 FoodNet data. Taenia saginata and Trichinella – pathogens eliminated from US food supply but still exist in other countries. Mary Mallon ("Typhoid Mary") – shed Salmonella Typhi (typhoid fever). Neurocysticercosis – caused by ingestion of pork tapeworm eggs. Fungi and worm contaminants are rare in the United States (True). Norovirus – NOT included in CDC FoodNet data. Viruses are undetectable in fecal smears. Elderly at risk for foodborne infections due to weakened immune systems. Most microorganisms will only grow at temperatures above 41°F; Salmonella can grow in the refrigerator. Long fingernails/hair in contact with foods – example of poor personal hygiene. FoodNet & Surveillance: CDC FoodNet – collects data from everyone in the country (False – sentinel sites), does NOT include norovirus. Vibrio infections according to FoodNet data – continuing to decline (False). Food Safety Modernization Act (FSMA): Most far-reaching food safety legislation in 70 years (True). Agroterrorism: Most common goal – economic harm. Global Food Trade Risks: Introduction of new pathogens, re-emergence of old pathogens, spread of contaminated foods across greater geographic areas. Locally Grown Foods Potential Problems: Use of non-approved sources, unknown handling conditions, unknown growth conditions. Organic Foods: Must meet required guidelines to be labeled USDA Organic; produced without bioengineering. Diagnosis of Foodborne Illness: Can be diagnosed using vomitus, blood, and stool. Handwashing: Recommended hand washing time in food service – 20-30 seconds; running water is required. Economic Impact of Foodborne Illness: Brand damage, brand recall, distrust by customers; loss of business reputation, treatment of infections, loss of work hours. Public Health Impact: Largely caused by just five pathogens including Listeria and Toxoplasma. Possible Outcomes Following Foodborne Illness: Blindness, paralysis, organ failure (all of the above). Foodborne Contamination Accounts for: 50 million illnesses annually in the United States. Cross-Contamination: Using same cutting board for raw meats and ready-to-eat foods can result in cross-contamination. Hazards: Biological hazard (pathogen), chemical hazard (lead, cleaning residues, antibiotic residues), physical hazard (physical objects, metal fragments). Hazard is a significant biological, chemical, or physical hazard that can cause harm and that is reasonably likely to occur if not controlled. Factors making a hazard successful – mechanism of transmission, low infectious dose, ability to survive/persist in environment, ability to evade immune system (pathogenicity/virulence). Pasteurized Milk Ordinance (PMO): Mandates inspections every 6 months; all producers must be licensed by state; sets critical control limits of milk quality and safety; unification of regulations to facilitate interstate sale of milk. Measures of milk quality – somatic cell count, bacterial concentrations, antimicrobial residues, pesticide residues. NCIMS ensures consistent milk regulations between states. Origin – created by National Conference of Interstate Milk Shippers from need for consistent milk regulations. Homogenization – same size fat globule to prevent cream from floating to top (longer shelf life). Separation – centrifugal process separating cream from milk to create desired fat percentage. Pasteurization – heating every particle of milk to specific temperature for specific time without allowing recontamination; thermal destruction of bacteria (NOT sterilization). Purpose – destroy potential bacterial threats to public health and improve milk quality. Types: low temp long time (batch method), high temp short time (continuous system), ultra high temp (Europe). Most sustainable beef comes from dairy farm. Dairy Production: Trends – fewer animals, more efficient production, larger farms; consolidation due to economics. Production classes – preweaned calf, weaned heifer, pregnant heifer, lactating cows, dry cows. Heifer calves (birth to 2 years) – pre-weaned (birth to 8 weeks, milk-based diet, individual or group housing), weaned heifers, pregnant heifers. Lactating cows – from calving to calving (9-11 months); most susceptible to disease first 3 weeks after calving due to negative energy balance, high metabolic stress, immune suppression. Dry cows – last 2 months of gestation (45-60 days, no milking). Common health challenges – heifer calves: diarrhea and pneumonia; lactating cows: retained placenta, metritis, mastitis, pneumonia. Milk withheld from supply – first 3 days of lactation (colostrum), abnormal milk (mastitis), cows treated with medications. Mastitis – infection/inflammation of mammary gland from bacteria ascended through teat canal; biggest cost to dairy industry; causes discarded milk, decreased production, culling. Clinical mastitis – abnormal milk appearance, cannot be sold, removal from herd, treated with antimicrobials. Subclinical mastitis – normal appearance, elevated somatic cell count, can be sold, usually not treated. Common food safety hazards – Salmonella, environmental contamination, antibiotics/vaccines withdrawal periods. On-farm control methods – monitoring milking parlors, stripping out teats, following withdrawal periods, preventing external/internal contamination. Limit contamination by rapid cooling after pasteurization. Dairy calves – not direct food safety concern but antibiotic resistance can spread. Poultry Production: Layers (egg production) cycle – breeder → hatchery → grower → layer → processing. Broilers (meat birds) cycle – eggs laid → chicks hatched, vaccinated → hatchery (21 days) → growers → processing. Contract farming – big corporations own animals, farmers feed and care for them. Vertical integration – single company owns and controls multiple stages of production. FDA Egg Safety Rule: Growers can only accept negative pullets; biosecurity to prevent SE transmission; cleaning and disinfection; pest control; refrigeration of eggs; flock testing; record keeping. Impact on growers – can only accept negative pullets. Impact on processing/consumers – must refrigerate eggs and cook properly. Impact on chicks/pullets – must be tested for SE. Impact on layers – must be tested at 40-45 weeks old for SE. Impact on producers – must administer multiple vaccines, add feed additives to prevent SE, test eggs at 2-week intervals. Prevention of SE – cleaning/disinfection, testing flocks, biosecurity, vaccination. Control of SE – dry clean, wet clean then disinfect contaminated areas; remove litter and apply disinfectant mid-lay. Aquaculture: Changes – increased US per capita consumption of fish, increased US seafood imports, increased number of US aquaculture farms, decreased food fish sold by US farms. Production stages – broodstock → hatchery → nursery → farms → processing. Biological hazards – bacteria (Salmonella, Campylobacter), viruses (hepatitis), parasites. Chemical hazards – marine toxins (shellfish poisoning), algae (pseudonitzschia), malachite green, crystal violet. Physical hazards – metal fragments. Routes of contamination – chemical/drug hazards in food fish, environmental hazards in water quality/pond bottom, infectious agent hazards, nutrition/feed management hazards. Control points – cultivation (water quality), feed management (free of toxins/harmful additives), biosecurity (disinfect equipment, quarantine), drug/chemical usage (withdrawal periods, banning of malachite green), sick health/morality (health monitoring, removal of diseased fish), post-harvest processing (product testing, packing, labeling). Beef Production: Major stages – calving → weaning → feeding → retail → processing. Seedstock operations – improve genetic foundation, monitor expected progeny differences (EPDs), sell bulls to cow-calf producers. Cow-calf operations – raise calves through weaning (3-7 months), calving in spring or fall, preconditioning. Preconditioning – prepares calves for next production stage via vaccination and rationing. Stocker/backgrounder operations – add cheap pounds for 30-100 days, vaccinate, deworm, implant; hormonal/non-hormonal implants increase weight gain and feed efficiency. If hormonal implants eliminated – issues with food security. Feedlot operations – high energy diet (corn) to add final pounds and improve meat quality, 3-4 ADG consuming 25 lbs of feed/day, vaccinate, deworm, implant. Food safety issues – cow-calf: need to vaccinate/deworm because of outdoor housing, reproductive diseases, parasites; stocker/backgrounder: health challenges from transport, co-mingling, weather; feedlot: co-mingling, long distance shipping, weather. Common food safety control points – antimicrobial resistance from vaccination/deworming, E. coli and Salmonella from ground beef (lymph node carriage), BSE (high risk tissues removed at processing), physical contaminants (needles). Veal food safety concerns – higher levels of Big Six E. coli, Salmonella, antimicrobial resistance. Bovine Respiratory Disease (Shipping Fever): Major health issue in beef production feedlot operations. Risk factors – transport, stress, weaning, vaccination. Food safety concern – antimicrobial resistance. Dairy Contribution to Beef Supply: Veal growers often start as dairy calves; male dairy calves go to veal or feedlot; culled dairy adults go to slaughter for meat. Top reasons for culling dairy cows – lameness and reproductive issues. Animal Welfare: World Organization for Animal Health (OIE) definition – physical and mental state in relation to conditions in which it lives and dies. Bramble Report definition – should have sufficient freedom and be without difficulty to turn around, groom, get up, lie down, stretch. Three approaches: Biological functioning – welfare is state as regards attempts to cope; focus on measurable health parameters (disease, milk production, BCS, ADG). Affective states – welfare depends on how animal feels; physiological measurements (cortisol, HR, behavior). Natural living – nurturing and fulfillment of animal's nature; ability to perform natural behaviors; assessed through motivation. Ethics asks "should or shouldn't we perform a certain management practice?" Science asks "how can we make a practice better or provide an alternative?" Perfect for Food Safety courses, Food Science, Public Health, Veterinary Medicine, and Food Protection Manager certification