Which lesion is a small fluid-filled blister?

The presence in or on the body of macroscopic organisms.

A cluster of interconnected boils is best described as a:

Match the following causes of diseases with their descriptions:

Increase in severity of a disease.

Which of the following is a common feature of Down’s Syndrome?

Gas emboli may result from: 

A localized collection of pus is called:

Which type of exudate contains a significant amount of red blood cells?

Down’s Syndrome is caused by which chromosomal abnormality?