MCQ on infectious diseases: Medical microbiology

                                             MCQ on Infectious diseases


1. Which of the following infectious diseases are the leading cause of human deaths in developing countries?
a)Diarrheal diseases
c)Respiratory tract infections
e) Malaria

2. A 56 year old man from a rural part of the Philippines with COPD (chronic inflammatory lung disease) visited the clinic. Symptoms included shortness of breath, abdominal pain, and fever for the last 24 hours, his oxygen saturation level came around 87 which was below the normal range. Pneumonia was suspected, thus a sputum sample and blood sample were taken for the gram staining examination, the results were uncertain. 
Further, a wet preparation procedure was done, and under the microscope, worms were detected.
What is the possible diagnosis?
a) Infectious mononucleosis
b) Nocardiosis
c) Strongyloidiasis   
d) Sporotrichosis

3) From the above question (2), which of the following can be the most common route/source of transmission to humans?
a) Close contact with soil and farms    
b) Person to person through respiratory air droplets
c) Through the bite of ticks and fleas
d) Sexually transmitted infection

4) Which of the following infectious diseases can be preventable through vaccination?
Select all the correct answers:
a) Diptheria
b) Measles
c) Hepatitis B
d) HIV      

5) Which of the following parasite is responsible for the disease malaria and is a leading cause of deaths occurring in tropical and subtropical regions?
a) Hepatitis B virus
b) Zika virus
c) Plasmodium falciparum    
d) Pneumocystis carinii

6) Which of the following is a major intestinal pathogen and is a leading cause of diarrheal deaths occurring in nations that do not have sufficient safe drinking water?
a) Entamoeba histolytica
b) Vibrio cholera       
c) Shigella dysenteriae
d) Yersinia enterocolitica

7) Name the antibiotic that is most effective for the treatment of the typhoid
a) Amphotericin B
b) Rifampicin
c) Retrovir
d) Ciprofloxacin      

8) Which of the following viral infection can lead to hemorrhagic fever in the chronic stage of the disease?
a) Dengue   
b) Malaria
c) Tuberculosis
d) Polio

9) Which of the following pulmonary infection is one of the leading causes of death among people with HIV?
a) Cystic fibrosis
b) Tuberculosis     
c) Nocardiosis
d) Toxoplasmosis

10) Which of the following viruses are the common cause of upper respiratory tract infections?
Select all the correct answers:
a) Rhinovirus
b) Influenza virus
c) Norovirus
d) Coronavirus

11. Which of the following is an example of a viral infectious disease? 
a) Tuberculosis 
b) Malaria 
c) Influenza 
d) Lyme disease

12. Which pandemic is caused by the SARS-CoV-2 virus? 
a) Spanish flu 
b) COVID-19 
c) H1N1 influenza 
d) Ebola virus disease

13. Which of the following is a preventive measure for reducing the spread of infectious diseases? 
a) Regular exercise 
b) Taking over-the-counter painkillers
c) Eating a balanced diet 
d) Getting vaccinated 

14. Which of the following diseases is primarily transmitted through contaminated food and water? 
a) Cholera 
b) Tuberculosis 
c) Zika virus 
d) Dengue fever

15. Which of the following is a fungal infection that affects the skin, hair, or nails? 
a) Dengue fever
b) Shigellosis
c) Athlete's foot 
d) Influenza 

Answers with explanation:
1. a)Diarrheal diseases, b)HIV/AIDS, c)Respiratory tract infections, d)Tuberculosis, and e) Malaria

2.c) Strongyloidiasis, Also known as threadworm infection, is a parasitic disease caused by the nematode (roundworm) called Strongyloides stercoralis. It is primarily found in tropical and subtropical regions, including parts of Africa, Asia, Central and South America, and certain areas in the southern United States.

3. a) Close contact with soil and farms, the infection is usually acquired when people come into contact with contaminated soil or water, such as through barefoot walking, ingestion of contaminated food, or poor hygiene practices.

4. a) Diptheria, b) Measles, and c) Hepatitis B. Currently there is no vaccine available for HIV.

5.c) Plasmodium falciparum is a parasite that causes malaria and is transmitted to humans by mosquitoes biteHepatitis B virus and Zika virus are viruses and Pneumocystis carinii is a fungal pathogen.

6. b) Vibrio cholera, is a leading cause of diarrheal deaths that occur in developing and underdeveloped nations.

7. d) Ciprofloxacin, a Flouroquinolone, it is first drug of choice that is safe and effective for the treatment of typhoid.

8. a) Dengue fever is a viral infection transmitted to humans by the bite of mosquitoes.  
b) Malaria is caused by parasite that is transmitted to humans by the bite of mosquitoes, c) Tuberculosis
is a bacterial infection and d) Polio virus is viral infection, that can lead to irreversible paralysis.

9. b) Tuberculosis is a major pulmonary infection, a common opportunistic infection in HIV infected individuals.

10. a) Rhinovirus, b) Influenza virus, and d) Coronavirus. c) Norovirus is a contagious virus that causes diarrhea and vomiting, also called stomach flu.

11. c) Influenza, Tuberculosis is a contagious pulmonary bacterial infection, b) Malaria is a parasitic infection and d) Lyme disease is a bacterial (spirochete) infection transmitted by to humans by the bite of ticks.
12. b) COVID-19 
13. d) Getting vaccinated 
14. a) Cholera 

15. c) Athlete's foot is a fungal infection, Dengue fever is viral infection b) Shigellosis is a bacterial infection and d) Influenza is a viral infection.