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Chapter 20: Problem 10

Shigella is transmitted by a. food c. feces b. flies d. all of these

Short Answer

Expert verified
d. all of these

Step by step solution

01

Understanding the Transmission

Examine each option and understand whether it can be a potential transmission medium for Shigella bacteria.
02

Evaluate Food as a Medium

Shigella bacteria can spread through contaminated food due to improper handling or hygiene.
03

Evaluate Feces as a Medium

Consider how Shigella can be transmitted through fecal-oral contact, often via contaminated water or surfaces.
04

Evaluate Flies as a Medium

Understand how flies can act as vectors, transferring Shigella bacteria from feces to food.
05

Conclusion

Since Shigella can be spread through contaminated food, feces, and flies, the most inclusive answer is d. all of these.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Foodborne Pathogens
Foodborne pathogens are harmful microorganisms that contaminate food and cause illness. They include bacteria, viruses, and parasites. Shigella is a prime example of a foodborne pathogen. Understanding how these pathogens spread is vital to prevent foodborne illnesses. The spread often happens through:
- Improper food handling
- Inadequate cooking
- Cross-contamination
- Poor personal hygiene
Shigella can contaminate food at any point from production to consumption. Always ensure food is cooked and stored properly, and practice good hand hygiene to minimize risks.
Fecal-Oral Transmission
Fecal-oral transmission is a common way for infections to spread. It occurs when pathogens in fecal matter enter the mouth and start an infection. This transmission pathway is crucial for understanding Shigella spread.
Some factors that contribute to fecal-oral transmission include:
- Contaminated water
- Poor sanitation
- Inadequate hand washing
Pathogens like Shigella can be present in water or on surfaces contaminated by feces. Improving sanitation and promoting hygiene practices can help break this transmission cycle. Also, ensure drinking water is safe and clean, and always wash hands, especially after using the restroom.
Vector-Borne Diseases
Vector-borne diseases are transmitted through vectors, which are living organisms that can carry pathogens from one host to another. In the case of Shigella, flies are a significant vector.
Vectors such as flies can pick up pathogens from feces and transfer them to food or other surfaces. Key measures to control vector-borne diseases include:
- Maintaining clean surroundings
- Properly disposing of waste
- Using nets and other barriers to keep vectors away from food
By reducing the presence of vectors like flies, we can significantly reduce the risk of diseases they spread.

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Most popular questions from this chapter

Which of the following is not an opportunistic enteric bacterium? a. Serratia b. Klebsiella c. Proteus d. Shigella

A unique characteristic of many isolates of Pseudomonas useful in identification is a. fecal odor c. drug resistance b. fluorescent green pigment d. motility

Which of the following are primarily zoonoses? a. tularemia d. brucellosis b. salmonellosis 猫. pasteurellosis c. shigellosis f. bubonic plague

Match the infectious agent with the disease it is most associated with. Francisella tularensis Yersinia pestis Escherichia coli \(\mathrm{O} 157: \mathrm{H} 7\) Shigella species Salmonella enterica Salmonella typhi Pseudomonas aeruginosa Bordetella pertussis Legionella pneumophila H. influenzae aegyptius Haemophilus influenzae Haemophilus ducreyi Pasteurella multocida a. dysentery b. local abscess c. chancroid d. enteric fever e. whooping cough f. meningitis g. typhoid fever h. hemolytic uremic syndrome i. bubonic plague j. Pontiac fever k. folliculitis 1\. rabbit fever \(\mathrm{m}\). pinkeye

A classic symptom of pertussis is a. labored breathing c. convulsions b. paroxysmal coughing d. headache
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