Infection control and safety for the CCMA exam

Read each stem for the organism or the material first; that usually decides the precaution or the container. The breakdown under each option names the rule.

1. Question 1

   Under standard precautions, which body fluid is NOT treated as potentially infectious?

   • AUrine
   • BVomit
   • CSaliva
   • DSweat
   Answer & explanation

   Answer: D. Sweat

   Standard precautions treat blood, all body fluids, secretions and excretions except sweat, non-intact skin and mucous membranes as potentially infectious for every patient. Saliva, urine and vomit can carry pathogens even when no blood is visible, so gloves are needed for contact with them. Intact skin and sweat alone do not require gloves.

   • Urine is a body fluid treated as potentially infectious under standard precautions, especially if blood may be present.
   • Vomit is a body fluid that standard precautions treat as potentially infectious for every patient.
   • Saliva is treated as potentially infectious, particularly in oral or dental procedures where blood may be present.
   • Correct: sweat is the one body fluid standard precautions do not treat as infectious, a frequent NOT-question answer.

2. Question 2

   Which set of conditions describes a standard steam autoclave cycle for wrapped instruments?

   • A350°F (177°C), no pressure, 15 minutes
   • B250°F (121°C), 5 psi, 5 minutes
   • C212°F (100°C), 15 psi, 15–30 minutes
   • D250°F (121°C), 15 psi, 15–30 minutes
   Answer & explanation

   Answer: D. 250°F (121°C), 15 psi, 15–30 minutes

   Steam sterilization uses about 250°F (121°C) at 15 psi for about 15–30 minutes, depending on the load, which kills all microorganisms including spores. 212°F is the boiling point of water, which does not reliably kill spores. Low pressure or a very short cycle leaves the load unsterile, and 350°F without steam describes dry-heat conditions that need much longer exposure.

   • 350°F with no pressure describes dry heat sterilization, which needs far longer exposure than a steam cycle.
   • Five psi for five minutes is too little pressure and time to reliably kill spores on wrapped instruments.
   • 212°F is only boiling temperature, which cannot kill all spores; pressurized steam reaches 250°F.
   • Correct: steam at 250°F (121°C) and 15 psi for 15–30 minutes is the standard cycle for wrapped instruments.

3. Question 3

   Immediately after use, a needle should be placed in a container that is:

   • AMade of clear glass and kept beside the exam table
   • BLined with a red bag and emptied when completely full
   • CRecapped by hand and dropped in the regular trash
   • DPuncture-resistant and biohazard-labeled
   Answer & explanation

   Answer: D. Puncture-resistant and biohazard-labeled

   Used sharps go directly into a puncture-resistant, biohazard-labeled container without recapping, to prevent needlestick injuries. Recapping by hand and regular trash are prohibited, and sharps containers are replaced at two-thirds to three-quarters full, not when completely full.

   • Glass can shatter and expose staff to sharps; containers must be rigid, closable and leak-proof.
   • Red bags hold soft regulated waste, and an overfilled sharps container invites needlesticks, so it is swapped out well before full.
   • Recapping by hand invites needlesticks, and used sharps never go into regular trash.
   • Correct: a puncture-resistant, leak-proof, biohazard-labeled sharps container close to the point of use is what OSHA requires.

4. Question 4

   Which is an example of an engineering control under the OSHA Bloodborne Pathogens Standard?

   • ASharps container
   • BAnnual TB screening
   • CHand hygiene policy
   • DHepatitis B vaccination
   Answer & explanation

   Answer: A. Sharps container

   Engineering controls are devices that isolate or remove the hazard, such as sharps containers and safety-engineered needles. A hand hygiene policy is a work-practice control, since it depends on how people carry out a task. TB screening and hepatitis B vaccination are medical surveillance and prevention for workers, not controls on the hazard itself.

   • Correct: a sharps container physically removes the needle hazard from the workspace, which is what makes it an engineering control.
   • TB screening is a medical surveillance measure, not a bloodborne pathogens engineering control.
   • Hand hygiene rules govern how staff behave, so they count as work practice controls, not engineering devices.
   • Hepatitis B vaccination is a protection OSHA requires employers to offer, but it is not an engineering control.

5. Question 5

   Between patients, the exam table is visibly soiled with blood. How should the medical assistant decontaminate it?

   • AWipe it once with 70% alcohol
   • BSpray disinfectant, then wipe off the blood
   • CCover it with fresh table paper
   • DClean off the blood, then disinfect
   Answer & explanation

   Answer: D. Clean off the blood, then disinfect

   Cleaning removes the blood and organic matter first, because soil shields microorganisms and inactivates disinfectants; the disinfectant is then applied for its full contact time. Spraying first and wiping the blood away skips the contact time on a clean surface. New table paper hides the blood without removing it, and a single alcohol wipe does not remove soil.

   • Alcohol evaporates quickly and does not lift dried or pooled blood, so one wipe leaves contamination behind.
   • Spraying disinfectant onto visible blood skips cleaning; the organic material shields microbes from the disinfectant.
   • Fresh paper hides contamination without removing it, so the next patient is still exposed.
   • Correct: cleaning always comes first to remove organic soil, then an EPA-registered disinfectant can act on the surface.

6. Question 6

   Linens visibly soiled with blood should be:

   • ADiscarded as regulated medical waste in a red bag
   • BSoaked in a bleach solution prior to transport
   • CRinsed in cold water before joining routine laundry
   • DBagged at the point of use with minimal handling
   Answer & explanation

   Answer: D. Bagged at the point of use with minimal handling

   Soiled linens are placed in leak-proof bags at the point of use and handled as little as possible to avoid aerosolizing pathogens. Rinsing or soaking increases splash exposure, and soiled linen is laundered, not automatically discarded as regulated waste.

   • Soiled linens are laundered, not thrown out as regulated waste, unless the facility uses disposables.
   • Soaking linens before transport adds handling and splash risk; disinfection happens during laundering.
   • OSHA prohibits rinsing or sorting contaminated linens where they were used, because it increases exposure.
   • Correct: OSHA requires contaminated laundry be handled as little as possible and bagged where it was used.

7. Question 7

   Where should a gauze pad saturated with blood, which would drip if squeezed, be discarded?

   • ASharps container
   • BSoiled-linen hamper
   • CRed biohazard bag
   • DRegular trash, double-bagged
   Answer & explanation

   Answer: C. Red biohazard bag

   Items that would release blood when compressed are regulated waste and go in a red or labeled biohazard bag; lightly spotted gauze or bandages may go in regular trash. Double-bagging does not make regulated waste ordinary trash. Sharps containers are for items that can puncture, and linen hampers are for reusable linens.

   • Sharps containers are for needles, lancets and broken glass, not soft blood-soaked materials.
   • The linen hamper is for reusable textiles, not disposable gauze saturated with blood.
   • Correct: gauze soaked enough to drip blood when squeezed meets OSHA's regulated-waste definition, so it belongs in a red bag.
   • Double-bagging in regular trash does not make saturated, dripping gauze acceptable as general waste.

8. Question 8

   Surgical asepsis is best described as technique that:

   • ALimits disinfectant use to registered products
   • BKeeps an area free of all microorganisms
   • CTreats every body fluid as being infectious
   • DReduces the number of microbes on the skin
   Answer & explanation

   Answer: B. Keeps an area free of all microorganisms

   Surgical asepsis (sterile technique) keeps items and areas completely free of microorganisms, including spores, and is required for invasive procedures. Reducing microbial numbers describes medical asepsis, a cleaner-but-not-sterile standard.

   • Using registered disinfectants is good practice, but it does not define surgical asepsis.
   • Correct: surgical asepsis, or sterile technique, keeps an area free of all microorganisms, including spores.
   • Treating every body fluid as infectious describes standard precautions, a different concept.
   • Reducing microbes on the skin describes medical asepsis, the clean technique, not sterile technique.

9. Question 9

   During routine handwashing with soap and water, which technique is correct?

   • AHold fingertips down while rinsing
   • BUse hot water to kill more microbes
   • CTurn off the faucet with clean bare hands
   • DHold fingertips up while rinsing
   Answer & explanation

   Answer: A. Hold fingertips down while rinsing

   For medical asepsis, hands are held lower than the elbows so water runs off the fingertips into the sink, carrying microbes away from the clean hands; the faucet is turned off with a paper towel. Holding fingertips up is the surgical-scrub technique, where water drains away from the hands toward the elbows. Hot water dries the skin without killing more organisms, and touching the faucet re-contaminates clean hands.

   • Correct: fingertips pointed down let rinse water carry microbes off the hands into the sink, away from the wrists.
   • Hot water dries and irritates skin without killing more microbes; warm water is recommended.
   • Clean hands should not touch the faucet again; turn it off with a paper towel.
   • Fingertips up belongs to the surgical scrub; during routine handwashing it lets dirty water run toward the wrists.

10. Question 10

    Which link in the chain of infection is most effectively broken by hand hygiene?

    • AMode of transmission
    • BThe susceptible host's immune status
    • CThe reservoir where the agent lives
    • DThe portal of entry into the host
    Answer & explanation

    Answer: A. Mode of transmission

    Hand hygiene primarily interrupts the mode of transmission, since hands are the most common vehicle carrying pathogens between patients. Altering the reservoir, portal of entry, or host immunity requires other measures such as isolation or vaccination.

    • Correct: hands are the main vehicle carrying microbes between people, so hand hygiene interrupts the mode of transmission.
    • Host immunity is strengthened by vaccines and nutrition, not by the caregiver washing their hands.
    • Reservoirs are addressed by cleaning, disinfection and treating infected people, not primarily by hand hygiene.
    • Portals of entry are protected with PPE and wound care; hand hygiene mainly stops the transfer itself.

11. Question 11

    A unit using only alcohol hand rub sees ongoing C. difficile spread. The most likely infection-control gap is that alcohol:

    • AEvaporates before it can act at all
    • BWas applied to gloves, not bare hands
    • CDoes not kill C. difficile spores
    • DIs too diluted to affect any microbe
    Answer & explanation

    Answer: C. Does not kill C. difficile spores

    Alcohol-based products do not kill C. difficile spores, so units must use soap and water to physically remove them during an outbreak. The failure is spore resistance, not evaporation, dilution, or glove use.

    • Alcohol rubs act within seconds on most bacteria and viruses; evaporation is not why they fail here.
    • Glove use matters, but the core gap is that alcohol cannot inactivate C. difficile spores at all.
    • Correct: C. difficile forms spores that resist alcohol, so soap and water is needed to wash them off mechanically.
    • Standard 60–95% alcohol rubs work against most microbes; dilution does not explain spreading C. difficile.

12. Question 12

    After drawing 0.5 mL from a single-dose vial, 1 mL remains. The next patient needs 0.5 mL of the same drug. What should the medical assistant do?

    • ADate it and refrigerate it for 28 days
    • BUse it with a new needle and syringe
    • CDiscard the vial; open a new one
    • DSave it for the same patient's next visit
    Answer & explanation

    Answer: C. Discard the vial; open a new one

    A single-dose vial has no preservative and is meant for one patient in one procedure, so leftover drug is discarded even if a new needle and syringe are used; reusing single-dose vials has caused hepatitis outbreaks. The 28-day dating rule applies to multi-dose vials, and saving the vial for a later visit still leaves an opened, preservative-free product.

    • The 28-day rule applies to opened multi-dose vials, not single-dose vials, which lack preservatives.
    • A new needle and syringe does not make a single-dose vial safe for a second patient.
    • Correct: single-dose vials are for one patient, one time; whatever drug is left over is discarded.
    • Saving a single-dose vial invites contamination, since it has no preservative to slow microbial growth.

13. Question 13

    Compared with an N95 respirator, a standard surgical mask is designed to protect against:

    • AFine airborne particles under five microns
    • BLarge droplets, splashes, and sprays
    • CTuberculosis transmitted through room air
    • DAll inhaled hazards during long procedures
    Answer & explanation

    Answer: B. Large droplets, splashes, and sprays

    A surgical mask blocks large-particle droplets, splashes, and sprays and provides source control, but it does not seal to the face. Filtering fine airborne particles such as TB requires a fit-tested N95 respirator.

    • Fine airborne particles under five microns are what an N95 filters; a surgical mask does not seal against them.
    • Correct: a surgical mask blocks large droplets, splashes and sprays, which is why it suits droplet precautions.
    • Tuberculosis spreads by airborne droplet nuclei, which call for a fit-tested N95, not a surgical mask.
    • No mask protects against every inhaled hazard, and a surgical mask is not a respirator at all.

14. Question 14

    Which PPE should a medical assistant wear to irrigate a draining wound when splashing is likely?

    • AGloves and a surgical cap
    • BGloves, gown, face shield
    • CGloves alone
    • DGloves and an N95 respirator
    Answer & explanation

    Answer: B. Gloves, gown, face shield

    Standard precautions call for PPE matched to the expected exposure: irrigation can splash fluid onto clothing and into the eyes, nose and mouth, so a gown and face shield (or mask and goggles) are added to gloves. Gloves alone leave the face and clothing exposed, an N95 is for airborne diseases, and a cap does not protect mucous membranes.

    • A cap covers hair but leaves the face and clothing exposed to splashing fluid.
    • Correct: splash risk calls for gloves, a fluid-resistant gown and a face shield to protect skin, clothing and mucous membranes.
    • Gloves alone protect only the hands, leaving eyes, mouth and clothing open to splashes.
    • An N95 filters airborne particles but does not shield the eyes or clothing from wound drainage.

15. Question 15

    An MA removes gloves after a procedure. Is hand hygiene still needed, and why?

    • ANo, unless the hands look visibly dirty
    • BYes, but only an alcohol rub is ever allowed
    • CYes, because gloves can have unseen defects
    • DNo, since the gloves kept hands fully clean
    Answer & explanation

    Answer: C. Yes, because gloves can have unseen defects

    Hand hygiene is performed after glove removal because gloves may have micro-perforations and hands can be contaminated during removal. Gloves are not a substitute for hand hygiene, and either soap-and-water or an alcohol rub may be appropriate.

    • Hands can be contaminated without looking dirty, so hand hygiene follows every glove removal.
    • Hand hygiene is needed, but soap and water is sometimes required, such as visible soil or C. difficile.
    • Correct: gloves can have tiny holes and hands get contaminated during removal, so hand hygiene always follows.
    • Gloves reduce exposure but are not a perfect barrier, so hands are never assumed fully clean.

16. Question 16

    A blood-filled glass capillary tube breaks. Which container receives the pieces?

    • AThe sharps container
    • BThe recycling stream
    • CA red biohazard bag
    • DThe general waste bin
    Answer & explanation

    Answer: A. The sharps container

    Broken glass contaminated with blood can puncture skin, so it goes in the puncture-resistant sharps container, not a red bag. Non-sharp blood waste uses a biohazard bag, but sharp items always require the sharps container.

    • Correct: blood-contaminated broken glass is a sharp: pick it up with tongs or a dustpan and place it in the sharps container.
    • Blood-contaminated glass is regulated waste and can never enter the recycling stream.
    • Glass fragments can cut through a red bag, so sharp items always go in a sharps container.
    • Contaminated sharps never go into general waste, where they could injure custodial staff.

17. Question 17

    Right after a needlestick, a worker washes the site, then hesitates. What should happen next?

    • AReport it and get a medical evaluation
    • BApply antibiotic ointment and move on
    • CWait to see whether symptoms develop
    • DResume the draw to avoid a redraw later
    Answer & explanation

    Answer: A. Report it and get a medical evaluation

    After washing the site, the exposure is reported and the worker undergoes prompt medical evaluation for post-exposure prophylaxis decisions. Continuing work, self-treating, or waiting for symptoms delays needed care.

    • Correct: after washing, report right away and get a prompt evaluation, since PEP decisions are time-sensitive.
    • Ointment does nothing against bloodborne viruses, and skipping the report loses the window for PEP.
    • Waiting for symptoms delays post-exposure care that works best when started early.
    • Finishing the draw puts the procedure ahead of an exposure that needs immediate attention.

18. Question 18

    Under OSHA, which item must carry a biohazard label or be red-colored?

    • AA refrigerator holding blood samples
    • BA bin of used exam-table paper
    • CA cabinet of sterile unopened syringes
    • DA refrigerator holding only vaccines
    Answer & explanation

    Answer: A. A refrigerator holding blood samples

    OSHA requires biohazard labels (fluorescent orange or orange-red with the biohazard symbol) or red containers on regulated waste and on refrigerators and freezers holding blood or other potentially infectious materials. Vaccines and unopened syringes are not infectious materials, and ordinary used table paper without blood is regular trash.

    • Correct: refrigerators storing blood or other potentially infectious materials must display a biohazard label under OSHA.
    • Used exam paper without blood or body fluids is regular waste and needs no biohazard label.
    • Sterile, unused syringes are not contaminated and do not require biohazard labeling.
    • A vaccine-only refrigerator holds no blood or infectious materials, so a biohazard label is not required.

19. Question 19

    E. coli living in the large intestine without causing disease is an example of:

    • AAn opportunistic infection
    • BNormal flora
    • CA nosocomial infection
    • DA pathogenic reservoir
    Answer & explanation

    Answer: B. Normal flora

    Normal flora are microorganisms that normally live on or in the body without causing disease, such as E. coli in the colon. The same organism can cause an opportunistic infection if it reaches another site, such as the bladder, or if the host is immunocompromised, and a nosocomial infection is one acquired in a healthcare setting.

    • An opportunistic infection is disease from a microbe exploiting weakened defenses; here there is no disease at all.
    • Correct: normal flora are microbes that live in the body without causing disease, like E. coli in the colon.
    • A nosocomial infection is acquired in a healthcare setting and causes illness, which this does not describe.
    • E. coli can cause disease elsewhere, but living harmlessly in the gut makes it normal flora, not a pathogenic reservoir.

20. Question 20

    A patient just back from international travel reports fever and a new rash. The MA should first:

    • ASeat them in the waiting room and proceed later
    • BRoom the patient privately and alert the provider
    • CDirect them straight to the ER without any triage
    • DReschedule them once the fever has resolved
    Answer & explanation

    Answer: B. Room the patient privately and alert the provider

    Fever and rash after foreign travel may signal a communicable disease, so the MA promptly places the patient in a private room and notifies the provider for assessment and isolation decisions. Sending them out untriaged or seating them among others risks exposure.

    • Leaving a possibly contagious patient in a shared waiting room could expose others to measles or similar illness.
    • Correct: fever plus rash after travel may be contagious, so separate the patient promptly and alert the provider.
    • Sending a patient off without assessment skips the provider's evaluation and may expose others along the way.
    • Rescheduling delays evaluation of a possibly serious illness and does nothing to protect anyone in the meantime.