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Hygiene

Hygiene is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hygiene rather than just read about it. In short: Hygiene is a set of practices performed to preserve health. According to the World Health Organization (WHO), "Hygiene refers to conditions and practices that help to maintain health and prevent the spread of diseases." Personal hygiene refers to maintaining the body's cleanliness.

Hygiene — main illustration
Hygiene — illustration

Key takeaways

  • Hygiene belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Hygiene to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hygiene from memory before moving on to harder problems.

Reference excerpt

Hygiene is a set of practices performed to preserve health. According to the World Health Organization (WHO), "Hygiene refers to conditions and practices that help to maintain health and prevent the spread of diseases." Personal hygiene refers to maintaining the body's cleanliness. Hygiene activities can be grouped into the following: home and everyday hygiene, personal hygiene, medical hygiene, sleep hygiene, and food hygiene. Home and every day hygiene includes hand washing, respiratory hygiene, food hygiene at home, hygiene in the kitchen, hygiene in the bathroom, laundry hygiene, and medical hygiene at home. While often equated with cleanliness in common usage, hygiene is a term encompassing the personal practices and environmental conditions that maintain health and prevent disease.

Definition and overview Hygiene is a practice related to lifestyle, cleanliness, health, and medicine. In medicine and everyday life, hygiene practices are preventive measures that reduce the incidence and spread of germs leading to disease. Hygiene practices vary from one culture to another. In the manufacturing of food, pharmaceuticals, cosmetics, and other products, good hygiene is a critical component of quality assurance. The terms cleanliness and hygiene are often used interchangeably, which can cause confusion. In general, hygiene refers to practices that prevent spread of disease-causing organisms. Cleaning processes (e.g., handwashing) remove infectious microbes as well as dirt and soil, and are thus often the means to achieve hygiene. Other uses of the term are as follows: body hygiene, personal hygiene, sleep hygiene, mental hygiene, dental hygiene, and occupational hygiene, used in connection with public health.

Home hygiene overview Home hygiene pertains to the hygiene practices that prevent or minimize the spread of disease at home and other everyday settings such as social settings, public transport, the workplace, public places, and more. Hygiene in a variety of settings plays an important role in preventing the spread of infectious diseases. It includes procedures like hand hygiene, respiratory hygiene, food and water hygiene, general home hygiene (hygiene of environmental sites and surfaces), care of domestic animals, and home health care (the care of those who are at greater risk of infection). At present, these components of hygiene tend to be regarded as separate issues, although based on the same underlying microbiological principles. Preventing the spread of diseases means breaking the chain of infection transmission so that infection cannot spread. "Targeted hygiene" is based on identifying the routes of pathogen spread in the home and introducing hygiene practices at critical times to break the chain of infection. It uses a risk-based approach based on Hazard Analysis Critical Control Point (HACCP). The main sources of infection in the home are people (who are carriers or are infected), foods (particularly raw foods), water, pets, and domestic animals. Sites that accumulate stagnant water – such as sinks, toilets, waste pipes, cleaning tools, and face cloths – readily support microbial growth and can become secondary reservoirs of infection, though species are mostly those that threaten "at risk" groups. Pathogens (such as potentially infectious bacteria and viruses – colloquially called "germs") are constantly shed via mucous membranes, feces, vomit, skin scales, and other means. When circumstances combine, people are exposed, either directly or via food or water, and can develop an infection. The main "highways" for the spread of pathogens in the home are the hands, hand and food contact surfaces, and cleaning cloths and utensils (e.g. fecal–oral route of transmission). Pathogens can also be spread via clothing and household linens, such as towels. Utilities such as toilets and wash basins were invented to deal safely with human waste but still have risks associated with them. Safe disposal of human waste is a fundamental need; poor sanitation is a primary cause of diarrhea disease in low-income communities. Respiratory viruses and fungal spores spread via the air. Good home hygiene means engaging in hygiene practices at critical points to break the chain of infection. Because the "infectious dose" for some pathogens can be very small (10–100 viable units or even less for some viruses), and infection can result from direct transfer of pathogens from surfaces via hands or food to the mouth, nasal mucous, or the eye, "hygienic cleaning" procedures should be adopted to eliminate pathogens from critical surfaces.

Hand washing

Regular handwashing with soap is one of the most effective ways to prevent the transmission of pathogens. It significantly reduces the risk of gastrointestinal and respiratory infections.

Respiratory hygiene

Correct respiratory and hand hygiene when coughing and sneezing reduces the spread of pathogens particularly during the cold and flu season:

Carry tissues and use them to catch coughs and sneezes, or sneeze into your elbow. Dispose of tissues as soon as possible.

Hygiene in the kitchen, bathroom and toilet

Routine cleaning of hands, food, sites, and surfaces (such as toilet seats and flush handles, door and tap handles, work surfaces, and bath and basin surfaces) in the kitchen, bathroom, and toilet rooms reduces the spread of pathogens. The infection risk from flush toilets is not high, provided they are properly maintained, although some splashing and aerosol formation can occur during flushing, particularly when someone has diarrhea. Pathogens can survive in the scum or scale left behind on baths, showers, and washbasins after washing and bathing.

Thorough cleaning is important to prevent the spread of fungal infections. Molds can live on wall and floor tiles and on shower curtains. Mold can be responsible for infections, cause allergic reactions, deteriorate/damage surfaces, and cause unpleasant odors. Primary sites of fungal growth are inanimate surfaces, including carpets and soft furnishings. Airborne fungi are usually associated with damp conditions, poor ventilation, or closed air systems.

Hygienic cleaning can be done through:

… excerpt ends here. Continue reading the full article.

Illustrations

Hygiene: Washing one's hands,[1] a form of hygiene, is the most effective way to prevent the spread of infectious diseases.
Washing one's hands,[1] a form of hygiene, is the most effective way to prevent the spread of infectious diseases.
Hygiene: Hand washing during pandemic
Hand washing during pandemic
Hygiene: Hand hygiene sign in public restroom
Hand hygiene sign in public restroom
Hygiene: A tippy tap for handwashing after using a urine-diverting dry toilet in Pumpuentsa, Ecuador
A tippy tap for handwashing after using a urine-diverting dry toilet in Pumpuentsa, Ecuador
Hygiene: Washing hygiene
Washing hygiene

Worked examples

Example 1 — a first encounter with Hygiene

Start with the simplest possible case. Write down what Hygiene claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hygiene before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hygiene ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hygiene

In research
Hygiene appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Hygiene in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Hygiene is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bathrooms, Hygiene, Medical hygiene, so understanding it makes those chapters shorter.
In everyday life
Look for Hygiene outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Hygiene in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hygiene means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hygiene out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hygiene in simple terms?

Hygiene is a set of practices performed to preserve health. According to the World Health Organization (WHO), "Hygiene refers to conditions and practices that help to maintain health and prevent the spread of diseases." Personal hygiene refers to maintaining the body's cleanliness.

Why does Hygiene matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hygiene?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hygiene.

Tags

  • Bathrooms
  • Hygiene
  • Medical hygiene
  • Sanitation

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