Week 4, Quiz 4

Match the appropriate culture media with these patient samples.

HEKTOEN ENTERIC AGAR: Sick patient with vomiting and diarrhea; stool sample taken

MANNITOL SALT (MS) AGAR: High school wrestler comes in with infected skin boils that look like Staphylococcus aureus; skin swab taken

SABOURAUD’S AGAR: Infant with a possible thrush (yeast) infection; mouth swab taken

What can you conclude from this streak plate?

It was made from a pure culture of one type of bacteria

In the case of the sick inmates, what behaviors or practices could have prevented the outbreak?

thorough heating of leftover food used in meal preparation

If a red blood cell is represented by the size of a cell phone (about 14-15 cm in length), which of these objects would be a good representation of the size of an average bacterial cell?

headphone earbud (1.5 cm)

Which of the following can be used to describe/evaluate colony characteristics?

Color

margin (edge)

size

texture

What is the best explanation for why this streak plate does not have any isolated colonies

The student forgot to flame the inoculating tool in between sections