MCQs on Urinary Tract Infection, UTI pathogens - Medical microbiology

                                                MCQs on Urinary Tract Infection, UTI

1) Which of the following is the least common microorganism isolated from urinary tract infections?
a) Escherichia coli    
b) Streptococcus pyogenes    
c) Proteus vulgaris
d) Enterococcus faecalis

2) A higher percentage of women get UTIs compared to men, what are the possible risk factors for developing the infection. 
Select all the correct answers?
a) Poor hygiene practices during the periods           
b) The anatomy of the urinary system of the women        
c) Change in the size of a uterus in pregnancy      
d) Hormonal changes during menopause        

3) Which of the following is Not the most common infection term used for UTI?
a) Endometriosis      
b) Cystitis
c) Pyelonephritis
d) Urethritis   

4) A 53-year-old male visited the hospital with a low-grade fever and a history of an episode of painful and frequent urination sometimes with blood in the urine. In 4 months it was the second time he suffered from a UTI. He recovered from the initial infection within a few days by taking plenty of water and some pain-relieving medicines. But the second time, symptoms continued for the third day and he could not recover from the infection.
Physical examination was done, a CT scan was performed and a urine sample was taken for the laboratory diagnosis. 
Select all the possible clinical features of the infection  
a)Inflammation and enlargement of the prostate gland    
b)Presence of bacterial pathogens in a urine sample   
c)Inflammation and damage to the uterus
d)Inflammation and presence of stones in the bladder       

5) Which of the following is the most possible cause of UTI in pregnant women? 
a)Changes in the hormones
b)The changes in the size of the uterus
c) Decreased bladder capacity and urinary retention 
d) All of the above      

6) A 78-year-old male with diabetes visited the hospital due to lower abdominal and groin pain. A physical examination raised suspicion of prostatitis, and his blood sugar level was found to be elevated at 175 mg/dl, exceeding the normal range of 99 mg/dl or lower. Consequently, he was promptly admitted to the hospital for sugar level management and observation.
Unfortunately, his symptoms worsened after 24 hours, and he experienced recurring urinary tract infections in the subsequent days. A urine sample was collected for culture, and colorless colonies of gram-negative bacteria were detected on MacConkey agar.
Name the possible pathogen?
a) Klebsiella oxytoca
b) E. coli
c) Candida albicans
d) Proteus mirabilis          
e) Staphylococcus saprophyticus
f) Lactobacillus acidophilus 

7) All of the following methods are effective preventive methods that can help in reducing the common UTIs in women, Except?
a) A shower after the sexual intercourse
b) Over the counter medicines for the cure of UTI           
c) Intake of plenty of fluids such as water, cranberry juice
d) Uses of nonirritating feminine products       
8)The most causative agents of urinary tract infections are bacteria and fungi
a) TRUE       

9) All of the following are the commonly used oral antibiotics in the treatment of febrile UTIs in infants and children under 5 years of age, Except?
a) Gentamicin        
b) Amoxycillin
c) Ciprofloxacin
d) Cephalexin

10) All of the following statements regarding acute pyelonephritis are correct, Except?
a) It is the presence of blood or pus in the urine
b) It is the infection of the bladder     
c) The causative organisms are the fecal pathogens
d) Risks factors are age, diabetes, and kidney stones

11) Which of the following is not the common cause of chronic cystitis?
a) Use of catheters for an extended period of time
b) Infection of adenoviruses
c) Abuse of drugs and toxic chemicals
d) Recurrent infection of the lungs    

12) Urinary tract infection may also result due to the infection in the kidneys, the infection is also called.............................................?
a) Urethritis
b) Cystitis
c) Acute pyelonephritis
d) Sinusitis

13) Which of the following urine sample collection is the most routine method for the laboratory diagnosis of UTI?
a) Midstream of the urine
b) End stream of the urine
c) Beginning stream of the urine
d) All of the above

14) Which of the following statements is false regarding the 'pyuria' of the urinary tract?
a) Longer use of catheters can lead to sterile pyuria 
b) Detection of white blood cells in the urine sample
c) Pyuria is associated with non pulmonary tuberculosis
d) Chlamydial infection is the only cause of a pyuria

15)Select the incorrect statement regarding the urine culture procedure done for the isolation and identification of the bacteria
a) First void urine sample is an appropriate and most widely used routine collection method
b)The urine sample is tested for color, chemical composition, and microscopic examination in the lab
c) .01 ml is the standard urine volume taken for the inoculation in culture media
d) Blood culture and MacConkey agar are the routine culture media used for the isolation method

16) What is the most commonly used drug for the treatment of acute bacterial UTIs in both females and males?

17) Acute UTI can be treated at home and manage the symptoms usually within 48 hours. 
What are the different measures that can subside the pain during urination and can help to get rid of the symptoms? Choose all the correct answers:
a) Drinking plenty of water can reduce the infection
b) Only antibiotics can help to reduce any type of UTIs
c) Cranberry juices have been found effective to ease the pain
d) Frequent cleaning of the genital area and taking a shower 

18)Select all the common procedures or tests used for the diagnosis of UTI
a)Computerized tomography

19) Which of the following gram negative bacteria is the predominant cause of bladder stones?
a) Actinomyces bovis
b) E. coli
c) Klebsiella pneumoniae
d) Staphylococcus aureus

20) A urine sample taken from the 22 year old pregnant woman was sent to the clinical lab for the culture and identification of the possible microorganism. 

Results after 24 hr. of incubation:
  • gram positive cocci 
  • no growth on MacConkey agar
  • coagulate test was negative
  • novobiocin resistant colonies appeared
Name the possible microorganism?
a) Candida albicans
b) Pseudomonas aeruginosa
c) Staphylococcus saprophyticus
d) Klebsiella pneumoniae

21. Which of the following gram negative bacteria is commonly associated with hospital acquired UTIs or people with weakened immune system?
a) Candida albicans
b) Clostridium botulinum
c) Nocardia asteroides
d) Pseudomonas aeruginosa

22. Name the gram negative pathogen that is known for causing is known for causing struvite stones that can contribute to UTIs.
a) Bacillus subtilis
b) Citrobacter freundii
c) Proteus mirabilis 
d) Yersinia enterocolitica

1- b)Streptococcus pyogenes is a gram positive bacteria that can cause strep throat and impetigo.

2- a)Poor hygiene practices during the periods, b)The anatomy of the urinary system of the women, c)Change in the size of a uterus in pregnancy, and (d)Hormonal changes during menopause

3- a)Endometriosis. it is a chronic medical condition that occurs when tissue similar to the lining of the uterus (endometrium) grows outside the uterus.   
4- a), b) and d)
5- d)All of the above

6- d)Proteus mirabilis, it is a gram negative bacteria that produces colorless colonies due to the lack of lactose enzyme. E. coli and Klebsiella oxytoca are gram-negative bacteria that produce lactose enzymes and thus appear pink in McConkey agar. Candida albicans is a yeast/fungi, Staphylococcus saprophyticus, and Lactobacillus acidophilus are gram positive bacteria.

7- b)Over the counter medicines for the cure of UTI 
8- a) TRUE
9- a)Gentamicin
10- b)It is the infection of the bladder (correct answer: infection of the kidneys)
11- d) Recurrent infection of the lungs
12- c)Acute pyelonephritis
13- a)Midstream of the urine
14- d)Chlamydial infection is the only cause of a pyuria

15-a)First void urine sample is an appropriate and most widely used routine collection method

16-c)Amoxicillin- it is the drug used for the treatment of UTI, Rifampin is the common antibiotic used for the treatment of tuberculosis, Miconazole antibiotic is used for the treatment of fungal UTI, Nitazoxanide antibiotic is commonly used for the treatment of parasite infection and other bacterial infection.

17-a), c) and d)

18-b)Cystoscopy and d)Ureteroscopy
Computerized tomography is a diagnostic test for different organs of the body, Spirometry is the diagnostic test for asthma.

19-b) E. coli, it is the most common bacteria isolated from the stone culture.  
a) Actinomyces bovis is a gram positive bacteria that causes mouth and gastrointestinal infection in cows and cattle. c) Klebsiella pneumoniae is a gram negative bacteria that is predominant pathogen of respiratory infections. d) Staphylococcus aureus is a gram positive bacteria that is a a part of normal flora of human skin, can become a opportunistic pathogen and causes skin infections, respiratory infections.

20-cStaphylococcus saprophyticus, a gram positive cocci and a common cause of UTIs in young sexually active women. 

21. dPseudomonas aeruginosa, it is a gram negative bacteria that can cause complicated UTIs in people with longer hospital stay and people with weak immune system.

22. c) Proteus mirabilis. A gram negative bacteria, consists of urease enzyme which leads to the formation of stones. 


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