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BONUS: If you wanted to trap bacteria on a membrane filter, while letting viruses pass through, a reasonable membrane pore size would be:

This oxidase-positive, gram negative fermenter is a fish pathogen. It occasionally causes gastrointestinal disease and infections in patients exposed to contaminated water.

Which of the following epidemiology definitions is INCORRECT?

Which is an example of vehicle transmission of disease?

An antibiotic susceptibility test shows the following results after incubation: If color represents growth, what is the MIC in this example?

Beta lactamase is an enzyme which breaks down:

Why are pili an important virulence factor in the production of gonorrheal disease?

The most serious infections caused by Hemophilus influenzae have which capsular antigen serological type?

Case 1: The patient was a 3 1/2 week-old male who was born at term. He required intubation at that time and continued to require respiratory support. Over a 24-hour period, the infant developed bulging anterior fontanelles (the “soft spots” in the skull), increased respiratory and heart rates, wide fluctuations in blood pressure, difficulties maintaining adequate tissue oxygenation, and his peripheral white blood cell count increased from 6,300 to 13,700/ml (high abnormal). The child began to have focal seizures as well. A cerebrospinal fluid (CSF) examination showed 3,900 WBC/ml (increased) with 92% neutrophils, glucose 2 mg/dl (decreased), and protein of 350 mg/dl (increased). Gram staining of the child’s CSF showed many gram-positive cocci. Case Study 1 Question 3: On a sheep blood agar, the colonies showed hemolysis.  What causes hemolysis in this particular organism?

Match each organism to the most likely method of transmission: