Guttate psoriasis induced by Staphylococcus aureus infection

Guttate psoriasis (GP) is an acute form of psoriasis commonly triggered by streptococcal infection, particularly in the pharyngeal or perianal regions. Its etiology involves both environmental and genetic factors that contribute to a complex immune response in the skin. Genetic predisposition, environmental factors, and immune dysfunction all contribute to the pathogenesis of psoriasis with host-microbe interaction governing the progression of this disease. Emerging evidence has indicated that infection is an environmental trigger for psoriasis and plays multiple roles in its maintenance as evidenced by the frequent association between guttate psoriasis onset and acute staphylococcal infection. Different infectious factors act on immune cells to produce inflammatory cytokines that can induce or aggravate psoriasis. We reported a 57-year-old female patient presented with erythematous plaques. The throat swab examination revealed aerobic Staphylococcus aureus growth