DH OSCE Review Questions with Correct
Answers 2025
What are the 6 modes of disease transmission? - CORRECT ANSWER -
Direct: Contact from patient's mouth to non intact skin.
Indirect: Contact with contaminated items.
Aerosols: High speed/Ultrasonic
Droplet: From spatter that contacts non intact skin.
Airborne: Inhalation of contaminated aerosols.
Waterborn: Infection from waterlines.
Maria is air polishing her patient's teeth. The office is warm and the air conditioning is not worki
ng, so Maria opts to not wear her face shield or face mask. Two weeks later, vesicles break out a
ll over her skin, which are diagnosed as chickenpox.
What is the mode of disease transmission? - CORRECT ANSWER -Droplet infection
Hepatitis A:
Mode of transmission - CORRECT ANSWER -Fecal/Oral
Hepatitis B:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
Hepatitis C:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
Hepatitis D:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
,NEEDS B TO HAVE D
"can't have the D w/o boobs"
Hepatitis E:
Mode of transmission - CORRECT ANSWER -Fecal/Oral
Hepatitis:
Risk of transmission is dependent on: - CORRECT ANSWER -Virulency
Quantity (level of exposure)
Host immune response.
What treatment considerations do you take into consideration when you have a patient who ha
s a history of hep? - CORRECT ANSWER -
MD if not clear of status and to determine liver dysfunction if liver affected, minimize drugs met
abolized in liver, monitor prothrombin time (INR), platelet count, use standard precautions
Post-exposure protocol (if we get exposed): - CORRECT ANSWER -
Stop treatment, remove gloves, wash wound w soap and water, gloves on, complete procedure
to ensure patient comfort and safety, review patient med history, ask patient to get tested to de
termine infectious status, if you don't know source, get baseline test
HIV:
Pre-appointmentBconsiderations - CORRECT ANSWER -CD4 count to know immune response-
below 200 cells/mm- do not treat
HIV:
What are possible intra/extra oral findings? - CORRECT ANSWER -
EO: lymphadenopathy or skin lesions (herpetic or Kaposi's sarcoma)
, IO: fungal infections (candidiasis), hairy leukoplakia, Kaposi's sarcoma, viral lesions (HPV or CMV
)
Medical history:
Examples of "yes" or positive answers on a medical history that may require pre-
appointment considerations: - CORRECT ANSWER -
Physical condition (defective heart valve or congenital heart condition)
Systemic disease (diabetes, leukemia or immunodeficienes)
Drug therapy (steroid, chemotherapeutics, or blood thinners)
Prosthesis or TJR
Aerosols - CORRECT ANSWER -
Particle occurs in solid or liquid form (invisible) and remains suspended in air.
Spatter - CORRECT ANSWER -
Heavier larger particles that remain airborne for short time and are visible.
Tuberculosis:
Organism & Route of Transmission - CORRECT ANSWER -Organism: Mycobacterium tuberculosis
Inhalation of fresh droplets containing tubercle bacilli by individual coughing, breathing, sneezin
g.
Your patient marks "yes" for history of TB. What do you do? - CORRECT ANSWER -
Clinically active: do not treat until MD clearance
Past history: MD consult to determine current status
Tests: CXR and tuberculin test (Mantoux)
Drugs used: Isoniazid, Pyramzinamide, or Rifampin daily for 6 months
Answers 2025
What are the 6 modes of disease transmission? - CORRECT ANSWER -
Direct: Contact from patient's mouth to non intact skin.
Indirect: Contact with contaminated items.
Aerosols: High speed/Ultrasonic
Droplet: From spatter that contacts non intact skin.
Airborne: Inhalation of contaminated aerosols.
Waterborn: Infection from waterlines.
Maria is air polishing her patient's teeth. The office is warm and the air conditioning is not worki
ng, so Maria opts to not wear her face shield or face mask. Two weeks later, vesicles break out a
ll over her skin, which are diagnosed as chickenpox.
What is the mode of disease transmission? - CORRECT ANSWER -Droplet infection
Hepatitis A:
Mode of transmission - CORRECT ANSWER -Fecal/Oral
Hepatitis B:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
Hepatitis C:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
Hepatitis D:
Mode of transmission - CORRECT ANSWER -Blood, saliva, all bodily fluids
,NEEDS B TO HAVE D
"can't have the D w/o boobs"
Hepatitis E:
Mode of transmission - CORRECT ANSWER -Fecal/Oral
Hepatitis:
Risk of transmission is dependent on: - CORRECT ANSWER -Virulency
Quantity (level of exposure)
Host immune response.
What treatment considerations do you take into consideration when you have a patient who ha
s a history of hep? - CORRECT ANSWER -
MD if not clear of status and to determine liver dysfunction if liver affected, minimize drugs met
abolized in liver, monitor prothrombin time (INR), platelet count, use standard precautions
Post-exposure protocol (if we get exposed): - CORRECT ANSWER -
Stop treatment, remove gloves, wash wound w soap and water, gloves on, complete procedure
to ensure patient comfort and safety, review patient med history, ask patient to get tested to de
termine infectious status, if you don't know source, get baseline test
HIV:
Pre-appointmentBconsiderations - CORRECT ANSWER -CD4 count to know immune response-
below 200 cells/mm- do not treat
HIV:
What are possible intra/extra oral findings? - CORRECT ANSWER -
EO: lymphadenopathy or skin lesions (herpetic or Kaposi's sarcoma)
, IO: fungal infections (candidiasis), hairy leukoplakia, Kaposi's sarcoma, viral lesions (HPV or CMV
)
Medical history:
Examples of "yes" or positive answers on a medical history that may require pre-
appointment considerations: - CORRECT ANSWER -
Physical condition (defective heart valve or congenital heart condition)
Systemic disease (diabetes, leukemia or immunodeficienes)
Drug therapy (steroid, chemotherapeutics, or blood thinners)
Prosthesis or TJR
Aerosols - CORRECT ANSWER -
Particle occurs in solid or liquid form (invisible) and remains suspended in air.
Spatter - CORRECT ANSWER -
Heavier larger particles that remain airborne for short time and are visible.
Tuberculosis:
Organism & Route of Transmission - CORRECT ANSWER -Organism: Mycobacterium tuberculosis
Inhalation of fresh droplets containing tubercle bacilli by individual coughing, breathing, sneezin
g.
Your patient marks "yes" for history of TB. What do you do? - CORRECT ANSWER -
Clinically active: do not treat until MD clearance
Past history: MD consult to determine current status
Tests: CXR and tuberculin test (Mantoux)
Drugs used: Isoniazid, Pyramzinamide, or Rifampin daily for 6 months
