Microbiologie Test

What is major virulence factor for Streptococcus pneumoniae uses to evade the host’s immune
response?

60-man is hospitalized for pneumonia and urine catheter is placed. Patient feels better after 2
days, however he has dysuria and urgency. A urine culture reveals gramm+ in pairs and chain.
Antibiogram is resistant to vancomycin.What is most likely pathogen for this condition?

What pathogen causing indwelling device-associated infection?

A 35-y patient was put on Central Venous Perfusion (CVP) line in an Intensive Care Unit (ICU)
for 10 days. Culture grows staph epidermidis. What is appropriate description about staph
epidermidis?

A 4-year boy was admitted establish the diagnosis of a generalized skin rash and fever. The
family histories were not known because the boy was in care center from age of 2 months. The boy
experienced frequent upper respiratory infections and tonsillitis. Diffused epidermal exfoliation from
the face, thorax, members, and scalp were observed. What is most likely pathogen for above
condition?

Which of the following cocci is found in the mouth as normal flora?

A 25-y woman came to ER having 5-hour of fever, rash, and altered mental status. Her BP is low (76/58) and HR is fast. After physical exam, a used tampon is removed from genital tract. Culture of vaginal and nasal specimen reveals Gram positive in cluster. What most likely mechanism is responsible for problem?

Part of the success of the Streptococcus pyogenes bacterium lies in its ability to evade
phagocytosis. Which of the following helps in this evasion?

What are property of Staph aureus ?

A 6-year-old boy presents to his pediatrician for sore throat and a headache. His symptoms
began approximately 2 days ago and have not improved. The boy appears uncomfortable and feels
warm. Physical examination is notable for perioral crusted lesions with tonsillar swelling with
exudates. Which of the following is most likely cause the problem?

During one week, a 7-year boy develops pustules on his face. Then, some of the pustules break,
forming shallow erosions in appearance of a honey-colored crust. Next, new lesions form around the
crust. The boy’s¬ father has similar lesions after one week of the son’s illness. The Gram stain from a
skin pustule showed gram positive in grape-like clusters. The colonies were catalase positive. What
is the most likely microorganism?

Which biochemical test to distinguish between Staph epidermidis and Staph areus?

Streptococcus viridans can be differentiated from other haemolytic Streptococci on the basis of
its resistance to

A 55-year-old man came to IPD complaining of weakness, malaise, and cough. He has history of
smoking and social drinking. General condition upon admission was moderate: axillar temperature of
38 °C, respiratory rate of 21/min, SpO2 of 92%, heart rate at 90 beats/min, and blood pressure of
130/70 mm Hg. Bilateral pneumonia was suspected on chest-x ray. Culture of sputum showed
coagulase positive, Gram positive cocci. What factor is responsible for the problem?

A 6-year-old boy presents to his pediatrician for sore throat and a headache. His symptoms
began approximately 2 days ago and have not improved. The boy appears uncomfortable and feels
warm. Physical examination is notable for perioral crusted lesions with tonsillar swelling with
exudates. Pharyngeal swap reveals Strep pyogenes as causal agent. Which of the following is true
about the pathogen?

A 6-year-old boy presents to his pediatrician for sore throat and a headache. His symptoms
began approximately 2 days ago and have not improved. The boy appears uncomfortable and feels
warm. Physical examination is notable for perioral crusted lesions with tonsillar swelling with
exudates. Pharyngeal swap reveals gram positive cocci, with catalase negative and bacitracin
sensitive. Which Lancefield group the pathogen belongs?

A 4-year boy was admitted establish the diagnosis of a generalized skin rash and fever. The
family histories were not known because the boy was in care center from age of 2 months. The boy
experienced frequent upper respiratory infections and tonsillitis. Diffused epidermal exfoliation from
the face, thorax, members, and scalp were observed. What is most likely diagnosis for above
condition?

A 17-year female was admitted complaining about a fever of 39.3oC and vomiting. She started
her menstrual period 4 days before she became ill. On the next day of admission, she had continued
fever, vomiting and loose stools. She was hypotensive of SBP of 78 & DBP 54 mmHg with a heart
rate of 120 beats per min. Physical exam found most prominent erythematous rash on her trunk.
Cultures were obtained from vaginal specimen show catalase positive, Gram positive cocci of
staphylococcus colonies. Which pathogen is responsible the stated problem?

A 17-year female was admitted complaining about a fever of 39.3oC and vomiting. She started
her menstrual period 4 days before she became ill. Physical exam found most prominent
erythematous rash on her trunk. Vaginal specimen revealed Staphylococcus aureus. The patient was
given intravenous fluids and IV antibiotics and transported to the hospital. Which is true about the
pathogen?

A 55-year-old man came to IPD complaining of weakness, malaise, and cough. He has history of
smoking and social drinking. General condition upon admission was moderate: axillar temperature of
38 °C, respiratory rate of 21/min, SpO2 of 92%, heart rate at 90 beats/min, and blood pressure of
130/70 mm Hg. Bilateral pneumonia was suspected on chest-x ray. Culture of sputum showed
coagulase positive, Gram positive cocci. Which of the following microorganism causes for this
condition?

A 19-y sexually active woman came to OPD having dysuria and pain when urinating. Urine
culture reveals Gram positive, catalase positive cocci. Which two lab tests would be most helpful to
distinguish the causal organism from other members?

A 19-y sexually active woman came to OPD having dysuria and pain when urinating. Urine
culture reveals staph saprophyticus. Which is urease test result for this pathogen?

60-man is hospitalized for pneumonia and urine catheter is placed. Patient feels better after 2
days, however he has dysuria and urgency. A urine culture reveals gramm+ in pairs and chain.
Antibiogram is resistant to vancomycin. What is true about the pathogen?

Which test to be conducted to differentiate between Staph epidermidis and Staph saprophyticus?

A 39-y patient is on Central Venous Perfusion line in an ICU. Culture around the line grows
staph epidermidis. What is pathogenesis mechanism for this pathogen?

A 39-y patient is on Central Venous Perfusion line in an ICU. Culture around the line grows
Gramm positive, Coagulase negative cocci in cluster. What the pathogen most likely reacts with
Novobiocin test?

Which of the following bacteria is also called the gamma or nonhemolytic streptococci?

The bacteria involved in the production of dental caries is

Klebsiella is sensitive to

Vibrio ជាបាក់តេរី ៖

Prevention for Citrobacter is

Klebsiella ជាបាក់តេរី ៖

Mycobacterium Leprae ជាបាក់តេរី ៖

Enterobacter is sensitive to

Citrobacter ជាបាក់តេរី ៖

Cholerae is an infectious disease cause by :

Prevention for leprosy is

Enterobacter បង្កជម្ងឺ ៖

Mycobacterium leprae បង្កជម្ងឺ ៖

Serratia is sensitive to

Cholerae បណ្តាលអោយអ្នកជម្ងឺស្លាប់ដោយសារ ៖

Mycobacterium leprae ឆ្លងតាម ៖