Nokea
A 70-year-old man has developed prosphetic stomatitis. Apart of this he was found to have an evident lesion of mouth corners. Microscopical examination revealed large ovoid gram-positive cells. What microorganisms are most likely to be the leading etiological agent of such a lesion?
Correct Answer: A
Rationale: The correct answer is A: Candida fungi. In the context of a 70-year-old man with angular cheilitis (lesion at the corners of the mouth) and stomatitis, the presence of large ovoid gram-positive cells points towards Candida species, which are yeast fungi. Candida is a common opportunistic pathogen that can cause oral thrush and angular cheilitis in immunocompromised individuals, such as elderly people. Candida fungi are known to appear as large ovoid cells under microscopic examination.
Summary of other choices:
B: Streptococci are gram-positive bacteria and are not typically associated with large ovoid cells seen in this case.
C: Staphylococci are also gram-positive bacteria and are not known to present as large ovoid cells in this context.
D: Neisseria are gram-negative bacteria and are not the usual etiological agents for oral lesions like angular cheilitis.