Lab Safety and Chain of Infection Quiz

The six components of the chain of infection are: infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.

The three main methods of preventing the spread of biological hazards are: personal protective equipment (PPE), proper handwashing, and disposal of biological wastes.

The recommended procedure for handwashing includes wetting hands with warm water, applying antimicrobial soap, rubbing to form a lather and create friction, thoroughly cleaning between fingers and up to the wrist for at least 15 or 20 seconds, rinsing hands in a downward position, drying with a paper towel, and turning off faucets with a clean paper towel to prevent recontamination.

1:10

The basic outline of the biohazard symbol is a plain trefoil, which is three circles overlapping each other equally like in a triple Venn diagram with the overlapping parts erased. The diameter of the overlapping part is equal to half the radius of the three circles.

Flush the area with water for at least 15 minutes and then seek medical attention.

R - Rescue anyone in immediate danger, A - Activate the institutional fire alarm system, C - Close all doors to potentially affected areas, E - Attempt to extinguish the fire, if possible; exit the area

The steps of using a fire extinguisher are: P - Pull the pin, A - Aim at the base of the fire, S - Squeeze the handles, S - Sweep the nozzle side to side.

The four types of fire and their corresponding fire extinguishers are: Type A - Ordinary combustibles (water, dry chemical), Type B - Flammable liquids (dry chemical, carbon dioxide, halon), Type C - Electrical equipment (dry chemical, carbon dioxide, halon), Type D - Flammable metals (specialized dry powder, fought by specialized firefighters only).

Some general precautions for avoiding physical hazards include: avoiding running in rooms and hallways, watching for wet floors, bending knees when lifting heavy objects, and keeping long hair pulled back.

Some examples of ergonomic hazards include strain due to repeated positions.

I = infectious agent, R = reservoir, E = portal of exit, M = mode of transmission, E = portal of entry, S = susceptible host

Gloves, laboratory gown, eye and face shields, countertop shield

Wet hands with warm water, apply antimicrobial soap, rub to form a lather and create friction, thoroughly clean between fingers and up to the wrist for at least 15 or 20 seconds, rinse hands in a downward position, dry with a paper towel, turn off faucets with a clean paper towel

PULL the pin, AIM at the base of the fire, SQUEEZE the handles, SWEEP the nozzle side to side

Type A - Ordinary combustibles: water, dry chemical, loaded steam; Type B - Flammable liquids: dry chemical, carbon dioxide, halon foam; Type C - Electrical equipment and motor switches: dry chemical, carbon dioxide, halon; Type D - Flammable metals: Metal X, sand; dry powder; fought by lithium fire fighters only

b. 30 seconds

c. Specific hazard

Store the used radioactive material in a locked, marked room until the background count is down to 10 half-lives

Neutralize the acid and then soak it up with wet rags or spill pillows

To indicate the presence of hazardous biological materials

Wash out the eye thoroughly with running water for 15 minutes