clar697
Forum Guru
Topics: 190
Posts: 199
|
A 25-year-old man develops fever, muscle pain, and headache 1 week after being bitten by several ticks while camping near the Grand Canyon. The fever remits and he feels better in 7 days. Two to four days later, his symptoms recur. A Giemsa stain of a peripheral blood stain shows intracellular bacterium. Which of the following is the most likely explanation of the reoccurrence of symptoms?
A) Expression of endotoxin-like structures on the surface of the organism
B) Migration of the organism from a tissue site to the blood stream
C) Production of a toxin that had become suppressed during the infection
D) Secondary infection by a different organism of the same species
E) Variation of a major surface protein antigen of the organism
|
| jorgefhoyos
Forum Newbie
Topics: 1
Posts: 48
|
B
|
| JESRMagna
Forum Newbie
Topics: 1
Posts: 12
|
i disagree...it seems like the person was infected with a borrelia species, which is known for antigen variation (borrelia recurrentis)...thus leading to a relapsing fever
so i pick E
p.s. the bacterium was not intracellular...the picture showed a wbc, 3 rbcs and 2 spirochetes
|
| Karime
Forum Guru
Topics: 16
Posts: 1,270
|
e
___________________
Eterea ……..“Hoc in loco mors succurrere vivis gaudet”……("In this place death comes joyfully to the aid of the living" )
|
| nemdas
Forum Newbie
Topics: 0
Posts: 1
|
A 25-year-old man develops fever, muscle pain, and headache 1 week after being bitten by several ticks while camping near the Grand Canyon. The fever remits and he feels better in 7 days. Two to four days later, his symptoms recur. A Giemsa stain of a peripheral blood stain shows intracellular bacterium. Which of the following is the most likely explanation of the reoccurrence of symptoms?
A) Expression of endotoxin-like structures on the surface of the organism
 B) Migration of the organism from a tissue site to the blood stream
C) Production of a toxin that had become suppressed during the infection
D) Secondary infection by a different organism of the same species
E) Variation of a major surface protein antigen of the organism
|
|
| |
| | | | | |
