Which of the following are possible routes of exposure to infectious organisms? (Choose all that apply.)

• Direct contact (skin)

• Ocular (through the eye)

• Oral (through the mouth)

• Inhalation (breathed in)

Which of the following are among the basic rules for microbiological practice? (Choose all that apply.)

• Pipetting should always be done mechanically, never by mouth.

• After use, pipettes should be blown out with compressed air to remove any potentially infectious material that might remain.

• Wear gloves, a lab coat, and eye protection as appropriate.

• Never eat, drink, or smoke in the laboratory.

• Decontaminate work surfaces before and after work.

A biosafety level is a combination of ... (choose all that apply)

• Lab techniques

• Safety equipment

• Laboratory facilities

In most cases of laboratory infection that have been investigated, the cause of the infection could not be traced to a specific accident.

• True

• False

Biohazard risk group 1 involves organisms that are ...

• Likely to cause serious or lethal 
human disease

• Not associated with disease in healthy adults

• Associated with human diseases that are rarely serious

• Associated with serious or lethal human disease