Very late-onset flap margin corneal ulcer following laser in situ keratomileusis

Analysis of Pathogenic Bacteria of Mooren’s Ulcer and T Lymphocyte Activation

To analyze the distribution and types of pathogenic bacteria of Mooren’s ulcer and the activation mechanism of T lymphocytes to provide reference for the treatment of Mooren’s ulcer, 156 patients (162 eyes) who were in the hospital were rolled into the observation group. During the same period, 134 healthy people were rolled into the control group. The distribution of infectious pathogens in the observation group was identified. Then, flow cytometry was adopted to separate and detect the peripheral blood lymphocytes of patients, and RT-PCR was used to detect levels of the transcription factor T-bet, GATA-3, and Stat5 in peripheral blood mononuclear cells (PBMCs). It was found that fungal pathogens accounted for 43.59%; the bacterial infection rate was 40.38%. In the observation group, the CD4, CD8, and C25 were expressed more (P < 0.01), and the CD45 and CD45R were expressed less than the control group (P < 0.05); the proportion of Th1 cells was obviously higher (P < 0.01); the expression of T-bet and GATA-3 was obviously higher (P < 0.05), the percentage of HLA-DR in CD4+ and HLA-DR, CD-25, and CD69 in CD8+ positive cells was obviously higher (P < 0.05). In conclusion, fungal infection rate of Mooren’s ulcer is relatively high, peripheral blood T cells and their subgroups are abnormally activated, and T cell activation is related to the pathogenesis of Mooren’s ulcer.