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A sputum culture from a patient with pneumonia produces alpha-hemolytic Gram-positive cocci on blood agar. Which laboratory result would identify the organism as Streptococcus pneumoniae rather than viridans streptococci?

The beta-hemolytic streptococci that causes “strep throat” that may be associated with complications, such as rheumatic fever or glomerulonephritis, is Streptococcus Lancefield Group____.

The factor(s) that contribute to an organism’s ability to cause disease, include:

Which of the following is an acute and highly transmissible disease involving the superficial layers of the skin caused by infection with Staphylococcus aureus or Streptococcus pyogenes and is seen most often in infants and children?

Which of the following organisms is a leading cause of pneumonia, sepsis and meningitis in newborns resulting from vaginal contamination during childbirth?

A patient presents with a rapidly progressing wound infection after being bitten by a dog. The wound becomes painful, swollen, and begins to discharge a foul-smelling fluid within 24 hours. Gram stain shows Gram-negative rods. Which organism is most classically associated with infections transmitted through animal bites?

A technician is reading a sputum culture when she notices tiny, translucent colonies growing closely around a beta-hemolytic colony of Staphylococcus aureus on sheep blood agar (SBA). In fact, the colonies are growing in the area where the blood has been hemolyzed. What is the probable identity of the organism that is growing closely to the beta-hemolytic organism and why are they growing in the hemolyzed area?

A mother brings her lethargic, feverish 2-year old child into the emergency department. The baby is diagnosed with meningitis and the doctor does a spinal tap. The direct smear of the cerebrospinal fluid (CSF) shows many tiny gram-negative rods. The culture revealed that nothing grew on blood or MacConkey agars, but small, translucent colonies grew on Chocolate agar. What is the most probable identification of this organism?

What is the genus that plays an important role in the health of the female vaginal tract, protecting it against overgrowth of pathogens?

Coagulase is a test that will differentiate which of the following two organisms: