In an interactive exercise, learners identify the human body sites that harbor a normal resident flora and the sites that are sterile.

Learners read about endospores and view video clips demonstrating spore staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.

In this interactive object, learners categorize different metabolic activities as catabolic or anabolic and follow a glucose molecule through the processes of glycolysis, aerobic respiration, and fermentation.

In this learning activity you'll observe the growth of gram negative organisms and determine if they're lactose positive or negative.

Learners watch a brief video clip. They then follow step-by-step instructions on how to do a urine colony count and examine the criteria for determining if a colony count represents an infection. A brief quiz completes the object.

Learners read how microbes in such items as yogurt, bread, insulin, and insect sprays improve our lives.

Learners listen to the pronunciation of bacteria names and then type the words. They may choose the number of names that they wish to spell (up to 70). Immediate feedback is given, and a final score is provided at the end of the activity.

Learners view video clips demonstrating acid-fast staining procedures. Correctly stained slides are shown. The learning object includes two matching exercises.

In this interactive object, learners read the definitions of the parts of a cell and assemble a basic eukaryotic cell in a drag and drop exercise. A matching quiz involving cell terms and their definitions completes the activity.

Students read a description of audiograms. They review audiograms representing various degrees and types of hearing loss.

In this learning activity you'll uses observations to diagnose fungal diseases.

Students make observations and formulate an evaluation that includes diagnosis and microorganism identification and treatment.

Learners match the names of parasitic organisms to the diseases they cause and the modes of transmission.

Learners test their knowledge of fungal diseases by completing six exercises.

Learners match diseases with their portals of entry, causative agents, and associated vectors.

Learners read about audiological tests including pure tone testing, air conduction, bone conduction, Speech Reception Threshold, and Speech Discrimination Score. They listen to sounds and words recorded at different decibel levels and see a graphic representation of decibel ranges. A brief review concludes the activity.

In this overview, students examine and identify mannitol positive and mannitol negative bacteria on mannitol salt agar.

In this learning activity you'll observe information and formulate an evaluation that includes diagnosis and microorganism identification.

Learners listen to the pronunciation of the binomial names for microorganisms and then type the words. They may choose the number of names that they wish to spell (up to 112). Immediate feedback is given, and a final score is provided at the end of the activity.

Learners listen to the pronunciation of protozoa and worm names and then type the words. They may choose the number of terms that they wish to spell (up to 25). Immediate feedback is given, and a final score is provided at the end of the activity.

Learners listen to the pronunciation of fungi names and then type the terms. They may choose the number of names that they wish to spell (up to 13). Immediate feedback is given, and a final score is provided at the end of the activity.

The student categorizes defense mechanisms as specific or non-specific.

In this animated learning object, learners examine the regulation of inducible operons in bacterial systems.

In this interactive object, learners match the bacterial etiologic agent to the disease it causes.

Learners listen to the pronunciation of viral names and then type the terms. They may choose the number of names that they wish to spell (up to 16). Immediate feedback is given, and a final score is provided at the end of the activity.