Which of the following statements about cervicofacial actinomycosis is INCORRECT?

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110-20% of actinomycosis infections are located in the cervicofacial areaPus discharge typically contains visible sulfur granulesBlood agar cultures often show a characteristic molar tooth appearanceA history of trauma, such as dental extraction or jaw injury, is commonly present

Explanation

Option A is incorrect because the proportion of actinomycosis cases occurring in the cervicofacial region is not 110-20%, which is an invalid range. The other statements are true: pus from the lesion often contains sulfur granules; cultures on blood agar exhibit a molar tooth-like colony morphology; and patients usually have a history of trauma like tooth extraction or jaw trauma.