MCQ on Fungi and Fungal Infection (Medical Mycololgy)

Multiple Choice Question on Fungi and Fungal Infections

1) What are the different types of medically important fungal infections? 

Select from all the options below
a) Superficial mycoses
b) Subcutaneous mycoses
c) Opportunistic mycoses
d) Systemic mycoses

2) Which of the following are the Not the most common cultural characteristics of fungi?
a) They are heterotypic eukaryotic microorganisms
b) The cell wall is composed of chitin
c) Fungi reproduce asexually only
d) Can cause superficial and systemic diseases

3) Which of the following dimorphic fungi is a medically important human pathogen that can cause severe respiratory infections?
a) Cryptococcus neoformans
b) Histoplasma capsulatum
c) Mucor racemosus
d) Aspergillus niger

4) What are the different parts of the fungus that help in the laboratory identification and detection of the fungus and fungal cell wall? 

Select all the correct answers
a) Hyphae/ mycelia
b) Consists of a stalk/stem
c) A fruiting body with spores

d) Consists of the capsule enzyme

5) What are the different distinguishing characteristics between yeast and molds? 

Select from all the options given below
a) Yeast and molds both are multicellular organisms
b) Molds reproduce both asexually and sexually and yeast reproduce asexually
c) Molds have fuzzy growth colonies and yeast always grows as smooth colonies
d) The optimal growth temperature for molds is 37c 

6) Which of the following statements are true regarding Dermatophytosis? 

Select the correct answers
a) The most commonly occurring fungal infection in humans
b) Only dimorphic fungi cause dermatophytosis
c) Skin infections that are known as tinea and ringworms
d) The most common cause of lung infections

7) The pH level of the fungal culture media is an important growth factor for fungi, what is the best pH range for the growth?
a) pH 7 to 9
b) pH 3 to 5
c) pH 2 to 7
d) pH 4 to 6

8) All of the following are the common staining methods that are used in the direct microscopic examination for the diagnosis of fungal pathogens, EXCEPT?
a) India Ink stain
b) Silver stain
c) Lactophenol cotton blue stain
d) Leishman’s stain

e) Potassium hydroxide

f) Methenamine silver stain

9) What color does the fungal cell wall appear when dyed with Periodic acid-Schiff stain?
a) Black
b) Red
c) It appears colorless
d) Violet

10) Which of the following fungi is commonly found in moldy foods that can produce the mycotoxin called aflatoxin?
a) Stachybotrys chartarum
b) Mucor spp
c) Aspergillus flavus
d) Rhizopus spp

11) The growth temperature is an important factor for clinically important dimorphic fungi which occur in yeast and mold forms.
a) True
b) False

12) Which of the following is the most correct statement regarding the Deuteromycetes also known as fungi imperfecti?
a) They are the causative agent of subcutaneous mycoses
b) The sexual reproduction method is not clearly known
c) They produce basidiospores through the asexual reproduction method
d) None of the above

13) The yeast Saccharomyces cerevisiae is most commonly used in the production of which of the following product?
a) Wine
b) Orange juice
c) Cheese
d) Sausages

14) Which of the following antifungal medicine is most effective for the treatment of rashes in athlete's foot or ringworm fungal infection?
a) Optochin
b) Bacitracin and Zinc
c) Clotrimazole
d) Tobramycin

15) What are the most common laboratory culture media for fungi? 

Select from all the options below
a) Sabouraud dextrose agar
b) Brain heart infusion agar
c) Thayer Martin medium
d) Cornmeal agar

16)Select all the important pathogenic fungi responsible for the superficial/cutaneous mycoses in humans

a) Tinea pedis

b) Trichophyton rubrum

c) Candida albicans

d) Histoplasma capsulatum

e) Malassezia furfur

17) One of the routine microscopic laboratory identification methods of the fungal specimens is done by using..........

a) 70% KOH mount

b) 50% H2O2

c) 10% KOH

d) Formalin

18) Which of the following is a medically important fungus that is identified as a mold and contains conidiophores when examined under the microscope?

a) Saccharomyces cerevisiae

b) Rhizopus stolonifer

c) Candida tropicalis

d) Aspergillus fumigatus

19) All of the following are common pathogens that are naturally found in soil, Except?

a) Candida albicans

b) Coccidiodes immitis

c) Sporothrix schenckii

d) Cryptococcus neoformans

20) Which of the following clinically important black color fungus can grow in the indoor environment, usually in buildings and houses that have water leakage problems?

a) Penicillin spp

b) Aspergillus spp

c) Saccharomyces spp

d) Stachybotrys spp

21) ............................................is the most common fungal pathogen recovered from the respiratory tract infection

a) Histoplasma capsulatum

b) Aspergillus niger

c)Trichophyton rubrum

d)Malassezia furfur

22) Which of the following statement is incorrect regarding the Mucorales infection?

a) The most common cause of genitourinary tract infection    

b) Patients with diabetes are most susceptible

c) Rhizopus spp, Mucor spp are mucorales

d) Infection is caused by inhalation of spores

23) In the 1920s  Sir Alexander Fleming was able to discover an antibiotic from the mold...............................

a) Aspergillus spp

b) Mucor spp

c) Fusarium spp

d) Penicillium spp

e) Acremonium spp 

24) Select all the true statements about the harmful fungi and the increasing threat of fungal pathogens in the last few years?

a) Majority of animals and organisms die from deadly fungal pathogens 

b) Drug resistance to fungal infection has increased 

c) Fungal infection is increasingly becoming a worrisome agricultural threat

d) Multidrug-resistant pathogens have increased with difficulty in the treatment

25) Talaromyces marneffei, previously called Penicillium marneffei is

a) A common yeast pathogen in diabetic patients

b) A common pathogen only found in India

c)An important dimorphic fungus that commonly infects AIDS patients

d) A medically important mold that infects animals only

Multiple Choice Answers

1)-  a), b), c), and d
2-c) Reproduce asexually only
3-b) Histoplasma capsulatum
4-a), b), and c) are correct answers

Option d) is not correct, fungal cells do not possess capsule enzyme, it is present in bacteria. 

5 - b), and c) are correct answers
6-a)The most commonly occurring fungal infection in humans and, c) Skin infections that are known as tinea and ringworms

7-d) pH 4 to 6
8-d) Leishman’s stain
9-b) Red
10-c) Aspergillus flavus
11-True
12-b) The sexual reproduction method is not clearly known
13-a) Wine
14- c) Clotrimazole, is an antifungal cream

The options a), b) and c) are antibiotics and not the antifungal creams
15- Option a) & b)

16)- a), b), c), and e)

17)- c)10% KOH

18)- d)Aspergillus fumigatus

19)- a)Candida albicans is a normal flora of the human vagina

20)- d) Stachybotrys spp

21)- b) Aspergillus niger

22)- a)The most common cause of genitourinary tract infection 

23)- d) Penicillium spp

24)- a), b), c) and d)

25)-c)An important dimorphic fungus that commonly infects AIDS patients