Quiz: Diseases Spread by Food and Water

Q1. which uses cannot be transmitted by fecal-oral route?

A A. Polio viruses B B. NANB HEV C C. HAV D D. HIV

Q2. Concerning Gastroenteritis -All are true Except:

A A. It is a clinical practice caused by a variety of enteropathogen. B B. It ranks the 5th Cause of death among infants in Egypt C C. Adenovirus is the most common cause of dehydrating diarrhea D D. Giardia lamblia is the only parasite isolated from patients

Q3. Concerning viral Gastroenteritis All are true Except:

A A. Rotavirus is transmitted by fecal oral spread with secondary spread via respiratory route B B. Rotavirus incidence has a distinct seasonal pattern. C C. Norwalk virus is responsible for outbreaks in older children D D. Compared to rotavirus, enteric adenoviruses have a shorter IP

Q4. ORS contains ALL EXCEPT

A A. Calcium lactate B B. Na bicarbonate C C. Na Chloride D D. Glucose

Q5. Several patients have symptoms 2-3 hours after a meal; include malaise, nausea and vomiting although they have no fever. Which food- polsonings is the likely cause of this condition?

A A. Botulism B B. Salmonellosa C C. Staphylococcal D A. D . Clostridium perfringens

Q5. Several patients have symptoms 2-3 hours after a meal; include malaise, nausea and vomiting although they have no fever. Which food- polsonings is the likely cause of this condition?

A A. Botulism B B. Salmonellosa C C. Staphylococcal D A. D . Clostridium perfringens

Q6. Which food poisonings a blood sample should be sent to lab?

A A. Botulism B B. Salmonellosis C C. Staphylococcal D D. Campylobacteriosis

Q7. Characteristic features of botulism include that:

A A. The mortality rate of the disease is 80% B B. The mortality rate of the disease is 30-50% C C. The length of the incubation period is 3-4 days D D. The patient must be isolated

Q8. Concerning Food Poisoning - All are true Except:

A A. Autonomic nervous system disturbances and CNS impairment are prominent manifestations in botulism B B. Laboratory tests are not of value in acute food poisoning C C. Chemical food poisoning causes nausea, vomiting within 1-2 hs D D. Enterohemorrhagic E coli (EHEC), Yersinia enterocolitica, Yersinia pseudotuberculosis has a very Long incubation.

Q9. Isolation of a patient with typhoid fever is necessary until:

A A. The signs of clinical recovery are detected B B. Three consecutive stool cultures yield negative results C C. Three consecutive stool cultures yield negative results following complete clinical recovery D D. Negative bacteriologic studies repeated at four-day intervals.

Q10. Permanent typhoid carrier excretes bacilli for more than

A A. 3 months B B. 6 months C C. One year D D. 3 years

Q11. All are characteristic features of typhoid fever except:

A A. An isolated elevation of the H antigen titers B B. Elevation of O antigen titers and a reduction of H antigen titers C C. A reduction of the O antigen titers D D. The simultaneous elevation of both O and H antigen titers

Q12. Which antigen is used for diagnosis of typhoid carrier?

A A. Somatic Ag (O-Ag). B B. Virulence Ag (Vi-Ag). C C. Flagellar Ag (H-Ag). D D. None of the above.

Q13. The test used for diagnosis of typhoid fever during 1st week is

A A. Blood culture B B. Urine culture C C. Stool culture D D. Widal test.

Q14. The most important complication of typhoid fever is

A A. Bronchitis. B B. Myocarditis. C C. Intestinal perforation. D D. Cholecystitis.

Q15. Which is incorrect about Vi capsular polysaccharide vaccine?

A A. Composed of purified Vi antigen B B. Dose: a single parentral dose of 0.5 ml (25 mcg IM). C C. Produces sero-conversion in 93% of healthy adults D D. Recommended for all ages

Q16. Concerning Cholera - All are true Except:

A A. The infection is often mild or without symptoms. B B. Approximately one in 100 infected persons has severe disease C C. V cholera 01 has 2 major biotypes; classic and El Tor. D D. Currently, El Tor is the predominant cholera pathogen.

Q17. Concerning Cholera - All are true Except:

A A. Breast feeding can't prevent cholera infection B B. Malnutrition may aggravate the risk of infection C C. Humans are the usual reservoir of V. cholera D D. Excretion of organisms may continue for weeks

Q18. Choleric stools is best disinfected by

A A. Phenol B B. Bleaching powder C C. Formaldehyde D D. Cresol

Q19. Concerning choleraed All are true Except:

A A. Robert Koch discovered cholera during an outbreak in Egypt B B. V cholera 01 and 0139 are associated with epidemic cholera C C. V cholera 01 and an enterotoxin D D. V cholera is able to survive in an acidic environment.

Q20. Which is not essential in case of cholera epidemic?

A A. Weekly chlorination B B. Notification C C. Vaccination of individumic D D. Treatment with ORS & tetracycline

Q21. Chemoprophylaxis for cholera is done by administrating

A A. Doxycycline 2 g PO once B B. Metrogyl 400 mg. 3 tablets C C. Vancomycin 1 mg. Stat D D. Kanamycin 500 mg. Stat

Q22. Concerning Amebiasis - All are true Except:

A A. Amebiasis is an infection caused by the protozoal organism B B. Transmission usually occurs by food-borne exposure C C. Second only to malaria as a protozoal cause of death D D. Symptomatic infection occurs in 90-99% of infected individuals

Q23. Concerning Amebiasis - All are true Except:

A A. Amebic liver abscess is 7-12 times more in men than in women B B. Amebic colitis affects both sexes equally C C. Fever is common and occurs in 70-90% of patients D D. finding quadri-nucleated cysts in stool is diagnostic

024. Concerning Enterobiasis - All are true Except:

A A. Enterobiasis is caused by the E vermicularis (nematode). B B. E vermicularis is an obligate parasite C C. Cats are the only natural host D D. Fecal-oral contamination via fomites is method of infestation

Q25. Concerning Enterobiasis - All are true Except:

A A. Self-infection by transferring infective eggs to mouth with hands B B. Incubation Period is from 2-4 months C C. Diagnosis is made by identifying eggs under microscope D D. Secondary bacterial skin infection occurs from scratching.

Q26. Concerning Ascaris lumbricoides - All are true Except:

A A. Causes the most common helminthic infection in the world. B B. Ascaris lumbricoides is a round worm cestode C C. Ascaris is the largest roundworm parasitizing human intestine D D. More than 1.4 billion people are infected worldwide

Q27. Concerning lumbricoides- All are true Except:

A A. Ascaris is found in countries with poor sanitary conditions. B B. Embryonated eggs is the infective stage. C C. Diagnosis is made by Identification of parasitic eggs in stool D D. Usually responds to treatment with metronidazole

Q28. Concerning Giardiasis - All are true Except:

A A. Giardia lamblia is a ubiquitous gastrointestinal protozoon B B. Has an incubation period of less than 48 hours C C. Stool examination for trophozoites or cysts is the traditional method for diagnosing giardiasis. D D. Usually responds to treatment with metronidazole

Q29. Concerning Giardiasis - All are true Except:

A A. Leaves the small bowel morphologically normal B B. G lamblia may release cytopathic substances that damage the intestinal epithelium C C. Chronic infection is marked by chronic diarrhea or steatorrhea and malabsorption D D. Breast feeding appears to protect infants from Giardia infection

Q30. Concerning Giardiasis - All are true Except:

A A. Is usually acquired by ingestion of food or water contaminated B B. Trophozoites have four flagella C C. Cysts are killed by standard chlorination of water D D. Cysts can't survive in water boiled for ten minutes

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