Serological diagnosis of Mycoplasma pneumoniae in patients with erythema multiform, Stevens-Johnson syndrome, and toxic epidermal necrolysis

Tran Thi Huyen, Nguyen Thi Ha Vinh, Pham Thi Minh Phuong, Nguyen Thi Thanh Thuy, Quach Thi Ha Giang, Le Huyen My, Le Huu Doanh

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Abstract

Mycoplasma pneumoniae causes not only pulmonary disease but also mucocutaneous manifestations. This cross-sectional descriptive study was conducted on 54 patients with erythema multiform (EM), 30 patients with Stevens-Johnson syndrome (SJS)/toxic epidermal necrolysis (TEN), and 30 healthy controls, aiming to determine the seropositivity rates for M. pneumoniae and to examine the association between M. pneumoniae with clinical features in these groups. The findings revealed that IgG and IgM seropositivity rates for M. pneumoniae in the SJS/TEN group were 13.33% and 33.33%, respectively; in the EM group, 20.37% and 25.93%; and in the healthy group, 10% and 16.67%. These differences were not statistically significant. In the SJS/TEN group, the IgM seropositivity rate for M. pneumoniae in individuals under 50 was 53.33%, higher than in those aged 50 or older (p < 0.05). In the EM group, the IgM seropositivity rate in patients younger than 30 was 40%, higher than in those aged 30 or older (p < 0.05). No age-related difference was observed in the healthy group. Among the EM patients, the IgM seropositivity rate for M. pneumoniae in febrile patients was 77.78%, significantly higher than the afebrile patients (15.56%, p = 0.0005). There was no significant difference between patients with and without mucosal involvement.

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References

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