Question

question 21 (mandatory) (1 point)
listen
a 22 - year - old male patient presents with foot pain. radiographic examination reveals fluffy periosteal new bone formation at the origin of the plantar fascia and achilles insertion. which infectious organism is most likely linked to triggering this reaction?
a) chlamydia trachomatis
b) streptococcus pyogenes
c) salmonella
d) yersinia

Explanation:

Reactive arthritis can be triggered by Chlamydia trachomatis (sexually - transmitted) or gastrointestinal infections (by Salmonella, Shigella, Yersinia, Campylobacter). In reactive arthritis, enthesitis (inflammation at tendon/bone insertion sites like plantar fascia origin and Achilles insertion) with fluffy periosteal new bone formation is common. Chlamydia trachomatis is a well - known trigger for reactive arthritis presenting with such osseous changes. Streptococcus pyogenes is more associated with conditions like rheumatic fever (not typically with this specific osseous - enthesitis pattern in the context of the described radiological findings related to the given sites).

Answer:

A. chlamydia trachomatis