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It is usually associated with fevers
80%
3722/4678
Cultures need to be held for 14 days
7%
344/4678
It colonizes the shoulder at increased rates compared to the knee and hip
5%
226/4678
Men have a higher bacterial burden than females
4%
202/4678
It is an important cause of clinical implant failure
3%
153/4678
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Surgeons need to be aware that P. acnes is a skin bacteria that is responsible for shoulder infections that often have a subtle presentation. Many of the traditional signs of infection such as fever, erythema and severe pain are often not present. Dodson et al describe a case series of 11 patients with P. acnes infections following shoulder arthroplasty stating that it represents a "diagnostic challenge". Traditional signs of infection were often not present. In fact, none of their patients presented with fevers. Initial 3 day cultures were often negative and the mean time to a positive culture was 9 days. Patel et al. looked at colonization rates and bacterial burden and found it to be higher around the shoulder than the hip and knee. The bacterial burden was higher in men than in women. The following responses are true and therefore are incorrect answers: 2. It is slow-growing and cultures need to be held longer (14 days). 3. It colonizes the shoulder at increased rates compared to knee and hip. 4. Men have a higher bacterial burden than females. 5. It is an important cause of clinical implant failure.
3.8
(35)
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