Infectious Diseases Affecting The Cardiovascular And Lymphatic Systems - Microbiology

Your patient was admitted for a gunshot wound about a week ago. As a precautionary activity, the doctor placed her on antibiotics for a few days while recuperating. Blood specimens are drawn on the patient a several times daily and sent to the microbiology lab for analysis of bacteria. Nothing
Has grown in culture. On her 4th day in the hospital, she has had no fever and no other signs of infection, but one set of blood specimens has been reported positive for a bacterium. The culture was identi?ed by the lab as Staphylococcus epidermidis, a common organism on the skin. Predict the likely situation leading to this.

A) Staphylococcus epidermidis is a very slow growing bacterium and was probably in the blood right after the gunshot wound, but failed to grow until now.
B) The patient is immunodepressed and very susceptible to bacterial infection.
C) Staphylococcus epidermidis is a skin contaminant that ended up in the blood specimen as a consequence of poor aseptic technique during the venipuncture.
D) Staphylococcus epidermidis has converted to a pathogen because of the antibiotics prescribed for the patient.

Answer

Question 2

(Multiple Choice)

Free

The ﬁbrous sac that encloses the heart is the ______.

A) myocardium
B) epicardium
C) ectocardium
D) endocardium
E) pericardium

Answer

Question 3

(Multiple Choice)

Free

Which of the following statements regarding the structure of blood vessels is incorrect?

A) Blood vessels are often found in parallel with lymphatic vessels.
B) Capillaries have only a single layer of endothelium, rendering them fragile and leaky during an infection with a hemorrhagic fever virus.
C) Connective tissue and muscle ﬁbers are found in the layers of tissue surrounding both arteries and veins.
D) In contrast to veins, arteries have higher blood pressure, more tissue layers, and are thinner vessels.

Answer