Pulsed-field gel electrophoresis (PFGE) can help link cases by showing they are infected with genetically indistinguishable strains of a pathogen.

Match each component of the plague transmission cycle with the correct organism.

The probationary employment period must always last a minimum of 90 days and a maximum of 180 days.

What can be said about positions on the higher levels of an organizational chart?

Which of the following best describes the Vaccine Adverse Event Reporting System (VAERS)?

At the beginning of employment, it is helpful to review both the goals and the basic philosophy of the center with the new employee.

During an outbreak investigation of gastrointestinal illness at a summer camp, investigators only interviewed campers who visited the infirmary and reported symptoms. Asymptomatic campers and those with mild illness who did not seek care were not included in the case-control study. Which type of bias is most likely introduced in this investigation design?

During a foodborne outbreak investigation, cases are interviewed several weeks after exposure. Which type of bias is most likely to affect the accuracy of their food histories?

The 2004 U.S. National Academies of Medicine report concluded that there is no epidemiological evidence to support a causal link between thimerosal in vaccines and autism.

Identify the position in a child care program that is responsible for supervising the total program of the individual classroom.