The image represents a skin infection on the upper arm. To identify the organism causing the infection, we need to consider the options provided:
Tinea corporis: A fungal infection characterized by ring-shaped, red, scaly patches, commonly occurring on non-scalp and non-groin areas such as the arms and legs.
Tinea capitis: This infection affects the scalp, causing hair loss and scaling, not typical on the upper arm.
Tinea cruris: Also known as jock itch, it affects the groin area, not the arm.
Tinea manus: Affects the hands, not typically the arms.
Considering the location and typical presentation, the infection is most consistent with Tinea corporis, which occurs on exposed areas like the arms.
