--- title: "Fecal-oral infection route and prevention" subject: "Technology, Environment and Society" chapter: 5 key: "semester_7/technology_environment_and_society:fecal-oral-route-prevention" source: https://www.bctengineer.com/q/semester_7/technology_environment_and_society/fecal-oral-route-prevention site: BCT Engineering --- # Fecal-oral infection route and prevention Technology, Environment and Society · Chapter 5: Water and Air Pollution - Asked in: 2079 Bhadra, 8 marks; 2074 Asoj, 8 marks (asked 2 times) - Video: [The F-Diagram: Pathways of Disease Transmission and Barriers to Protection"](https://www.youtube.com/watch?v=Htk4D0EiBWw) — Learn Public Health With Isaac - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_7/technology_environment_and_society/fecal-oral-route-prevention - Whole chapter: https://www.bctengineer.com/md/semester_7/technology_environment_and_society/chapter-5 ## Question Describe about fecal oral infection route and their preventive measures. ## Short answer The fecal-oral route spreads pathogens from faeces to a new host through fluids, fingers, flies, fields and food. Prevention uses primary barriers such as sanitary toilets and safe excreta disposal, and secondary barriers such as safe water, handwashing with soap, food hygiene and fly control. Health education and vaccination also help. ## Answer The **fecal-oral route** is the pathway by which disease-causing organisms (pathogens) present in the faeces of an infected person or animal enter the mouth of another person and cause infection. The pathogens are bacteria, viruses, protozoa and worm eggs. **Diseases spread this way:** diarrhoea, cholera, typhoid, dysentery, hepatitis A and E, polio, giardiasis, amoebiasis, roundworm and hookworm infection. Diarrhoeal diseases are still a major cause of child illness in Nepal, especially in the monsoon. #### Transmission route (F-diagram) Pathogens travel from faeces to a new host through five "F"s: ```text +--> Fluids (water) ------+ | | +--> Fingers (hands) -----+ FAECES -----+ +--> FOOD --> MOUTH +--> Flies ---------------+ (new host) | | +--> Fields (soil, crops)-+ ``` 1. **Fluids** – drinking water polluted by sewage, open defecation near sources or leaking pipes. 2. **Fingers** – unwashed hands after toilet use or cleaning a child. 3. **Flies** – flies sit on faeces, then on food. 4. **Fields** – open defecation and use of raw night soil on fields; vegetables and soil get contaminated; children play on soil. 5. **Food** – contaminated by any of the above, or by unclean utensils and poor cooking. #### Preventive measures Barriers are put at two levels: **Primary barriers (stop faeces reaching the environment)** - Safe excreta disposal: use of sanitary toilets (pit latrine, pour-flush, septic tank); end open defecation (Nepal declared itself Open Defecation Free in 2019). - Safe disposal of children's faeces. - Hand washing with soap after defecation. **Secondary barriers (stop pathogens reaching the mouth)** - **Safe drinking water** – protect sources, boil, filter, chlorinate (e.g. Piyush), or SODIS. - **Hand washing with soap** before cooking and eating. - **Food hygiene** – wash fruits and vegetables, cook properly, eat hot food, cover food, clean utensils. - **Fly control** – cover food and toilets, manage solid waste, keep surroundings clean. - **Proper sewage and waste water treatment**; separate water supply and sewer lines. **Other measures** - **Health and hygiene education** in schools and communities. - **Vaccination** (polio, typhoid, hepatitis A, rotavirus). - Oral rehydration solution (ORS) and zinc for treatment of diarrhoea to prevent deaths. - Regular deworming of children. Breaking the route at the source (toilets + hand washing + safe water) gives the largest health benefit. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. What is the fecal-oral route? A. Pathogens from faeces of an infected host enter another person's mouth B. Infection through mosquito bites C. Infection through skin cuts only D. Airborne droplets Answer: A. Pathogens move from faeces to a new host's mouth. (Key point: Definition) 2. Which list gives the F-diagram routes? A. Faeces, Fats, Fibre, Flies, Fish B. Fluids, Fingers, Flies, Fields, Food C. Fever, Fog, Fire, Fish, Food D. Fluids, Fans, Fuel, Fields, Food Answer: B. Fluids, Fingers, Flies, Fields lead to Food and mouth. (Key point: Five Fs) 3. Which is a primary barrier? A. Covering food B. Cooking properly C. Sanitary toilets and safe excreta disposal D. Boiling water Answer: C. Primary barriers stop faeces reaching the environment. (Key point: Primary barrier) 4. Which is a secondary barrier? A. Ending open defecation B. Safe disposal of children's faeces C. Building latrines D. Safe drinking water, hand washing with soap and fly control Answer: D. Secondary barriers stop pathogens reaching the mouth. (Key point: Secondary barrier) ## Related in Technology, Environment and Society - [Water pollution and fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Awater-pollution-fecal-oral) — Technology, Environment and Society, chapter 5 - [On-site vs off-site sanitation and fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Aonsite-offsite-fecal-oral) — Technology, Environment and Society, chapter 5 - [Environmental sanitation and fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Aenv-sanitation-fecal-oral) — Technology, Environment and Society, chapter 5, asked 2× - [Importance of understanding fecal-oral route](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Afecal-oral-importance) — Technology, Environment and Society, chapter 5 - [Fecal-oral route and health education](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Afecal-oral-health-education) — Technology, Environment and Society, chapter 5 - [Pollution, onsite sanitation, health education, fecal-oral](https://www.bctengineer.com/question.md?key=semester_7%2Ftechnology_environment_and_society%3Apollution-sanitation-fecal-oral) — Technology, Environment and Society, chapter 5 ## Related in other subjects - [Fecal-oral route and preventive measures](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Afecal-oral-preventive) — Water Supply Engineering, chapter 4 - [Fecal-oral disease transmission route](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Afecal-oral-route) — Water Supply Engineering, chapter 4, asked 7×