Author: Anonymous

A protozoan is seen extending portions of its cytoplasm outward, slowly flowing into these extensions to move toward a food particle and engulf it. This type of movement and feeding mechanism is best described as using: 

A patient develops a systemic mycosis. Imaging suggests a pulmonary infection acquired from inhalation from soil contaminated with bird excrement. Which organism is most likely responsible?

A patient presents to a clinic with a slowly expanding ulcerative lesion on the foot that began after a minor injury while walking barefoot through soil and decaying plant material. The infection has progressed beneath the skin and is now involving deeper connective tissues, but there is no evidence of infection in internal organs. Based on the route and depth of infection, which classification best describes this fungal disease?

A patient develops a rapidly progressive neurodegenerative disease, but laboratory testing reveals no nucleic acid in the infectious agent. Instead, the disease is caused by a misfolded protein that induces normal proteins in the brain to misfold as well. This infectious agent is best classified as a

An immunocompromised patient presents with headache, fever, and signs of meningitis. Laboratory testing suggests a fungal infection acquired from inhalation of yeast-like cells associated with pigeon droppings. Which organism is the most likely cause?

A freshwater lake experiences a seasonal increase in microscopic, photosynthetic organisms that float freely in the water and seem to serve as a primary food source for zooplankton.  Based on these characteristics, what type of organism is this most likely to be?

A researcher needs bacteria from a single species only in order to accurately identify metabolic characteristics. Which type of culture would provide the best sample? 

A microbiologist intentionally grows both Staphylococcus aureus and Escherichia coli together in the same flask to study microbial interactions. This flask contains a:

A patient develops an infection after eating food contaminated with Salmonella enterica. The microorganism invades intestinal tissue and causes diarrhea, fever, and abdominal cramps. Based on this information, Salmonella enterica would best be classified as a:

Place the following structures of a microscope in order as light passes through them until it reaches the observer’s eyes: