Preventive nutrition in hazardous industries
Specialized diets are used to protect chemical industry workers. The main rule for all options is the mandatory restriction of fats, salted foods, and table salt. Meals are usually dispensed before the shift starts in the form of a hot breakfast.
The most famous preventive product is milk (the standard norm is 0.5 L per shift). It contains lipotropic factors that enhance the antitoxic function of the liver, as well as easily digestible proteins. However, milk cannot be considered a universal poison neutralizer (for example, it only increases the absorption of phosphorus).
When working with inorganic lead, whole milk is replaced with 0.5 L of fermented milk product with the addition of 2 g of pectin. In antibiotic production, workers are entitled to sour milk or colibacterin, while in hot shops and tobacco factories, vitamin prophylaxis is actively used (vitamins A, group B, C, PP).
Therapeutic (dietary) nutrition in hospitals
Dietary nutrition is an integral part of treatment. It is based on the principles of whole-body impact, dynamism (strict restrictive diets should not be prescribed for a long time), and pathogenetic orientation (sparing, unloading, or training effect).
Upon admission to the hospital, patients must undergo an assessment of their nutritional status (based on body mass index and mid-arm muscle circumference). Cancer patients (85%) and patients with severe infections (80%) are at the highest risk for nutritional disorders.
A system of standard diets is used in hospitals. For example, according to Pevzner's classification, diet No. 1 is prescribed for gastroduodenitis, No. 5 for hepatitis, and No. 9 for diabetes. If a patient is unable to eat independently, enteral nutrition is used—the administration of specialized formulas via a tube or orally.
Sanitary control and catering department operations
The quality of food in a medical institution is checked daily by the tasting commission (brakerazhnaya komссия) with the mandatory participation of the on-duty doctor. Without their approval and a record in the tasting log, no dish is allowed for distribution.
To investigate possible food poisoning in the catering department, a daily sample is collected every day. At least 100 g of side dishes or drinks, as well as individual portioned dishes, are placed in labeled sterile jars and stored in the refrigerator for 48 hours after the expiration of the dishes' shelf life.
Food distribution in wards must be completed within 2 hours of preparation. Junior service personnel are not allowed to participate in this process. Dishes are processed strictly separately: tableware is washed in three compartments (degreasing at 50 °C, disinfection, rinsing at a temperature not lower than 65 °C), and tea ware in two.
Bacterial food poisoning
Food poisoning is characterized by a sudden onset, mass occurrence, association with a specific dish, and the absence of contagiousness (the patient is not contagious to others). The vast majority of cases are caused by bacteria.
- Foodborne toxic infections. Caused by opportunistic flora (E. coli, Proteus). The disease develops due to the combined action of live microorganisms and endotoxins released upon bacterial death in the intestine. The incubation period is 6–12 hours. They occur more frequently in summer due to salads, jellied meats, and boiled sausages.
- Bacterial toxicosis. Caused by exotoxins that microbes have already produced in the food product. A classic example is Staphylococcus (multiplies in cream-filled confectionery; the source is a cook with panaritium or tonsillitis). Another dangerous toxicosis is botulism, the poison of which is formed only without access to oxygen at a temperature of 10–30 °C.
Briefly: answers to topical questions
What are the numbers of therapeutic and preventive diets and what industries are they intended for?
A total of 5 preventive nutrition diets have been developed, intended for most hazardous chemical industries. The diets are differentiated depending on the mechanism of action of toxic substances and ionizing radiation. The sources specify only one specific number:
- Diet No. 3 — prescribed to workers for the prevention of lead poisoning.
What anthropometric and laboratory indicators are used to assess the nutritional status of a patient in a hospital?
The nutritional status of a hospital patient is assessed by anthropometric indicators of the somatic protein pool and laboratory indicators of the visceral pool. The following are used for evaluation:
- Mid-arm muscle circumference (MAMC) — an anthropometric indicator reflecting the state of somatic muscle protein.
- Body mass index (BMI) — a simple and highly informative anthropometric indicator (Quetelet index) for assessing nutritional status.
- Blood and visceral proteins — evaluated by laboratory methods to determine visceral protein (e.g., albumin concentration).
Which bacteria are the most frequent pathogens of food toxicoinfections?
The sources do not provide a complete list of the most frequent pathogens, but mention certain bacteria that cause food toxicoinfections. These include:
- Halophilic vibrios (Vibrio parahaemolyticus) — a transmission factor can be salted vegetables (cucumbers).
- Campylobacters (Campylobacter jejuni, C. coli, C. laridis) — cause campylobacteriosis, which in older children often occurs as a food toxicoinfection.
What are the types of non-microbial food poisoning?
Non-microbial food poisoning in the cited sources includes:
- Poisoning by poisonous mushrooms.
- Poisoning by chemical poisons.
Food poisoning does not include alcohol intoxication, food allergies, hypervitaminosis, drug poisoning, and intentional poisoning for the purpose of murder or suicide.
The conditions for the development of botulism can be remembered by the acronym ZANT: Spore contamination + Anaerobic environment + No adequate heat treatment + Temperature 10–30 °C.
Class and exam questions
Is milk a universal antidote in the workplace?
No. Upon contact with certain toxins (e.g., phosphorus), it can increase their absorption. Milk works through lipotropic factors that protect the liver.
Can preventive nutrition be given during lunch?
According to general rules, it is issued before work begins in the form of hot breakfasts. Issuing it during the lunch break is allowed only as an exception agreed upon with the medical service.
How does food poisoning fundamentally differ from infectious diseases?
It is not contagious. A person with food poisoning cannot infect others by contact or airborne droplets.
Why is a daily sample needed in a hospital catering department?
It serves as material for an epidemiological investigation. If an intestinal infection outbreak occurs, the sample will help quickly find the contaminated dish.
What else to study on this topic
- Detailed characteristics of Pevzner's therapeutic diets (Nos. 1–15).
- Standard diet options (general, sparing, high-protein, low-protein, low-calorie, high-calorie).
- Methods for assessing visceral and somatic protein pools.
- Non-bacterial food poisoning (poisoning plants, mushrooms).
- Regulatory and legal framework for organizing therapeutic nutrition in medical and preventive treatment facilities.
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