What is the Most Widely Used Method of Inoculum Standardization

Question

What is the most widely used method of inoculum standardization?
A) McFarland turbidity standards
B) Remel inoculum standards
C) Becton-Dickson standards
D) Difco standards

Accepted Answer

McFarland turbidity standards are the most widely used method of inoculum standardization in clinical microbiology. These standards provide a standardized suspension of bacterial cells that is used to prepare inocula for antimicrobial susceptibility testing and other clinical microbiology assays. The turbidity of the McFarland standards is adjusted to a specific optical density (usually 0.5) to provide a consistent and accurate inoculum size.