CD4 and chlamydia infectious disease: This result was corroborated in flowcytometry and immunohistochemistry studies that showed extant upper genitaltract Chlamydia infection was associated with increasedco-expression of CD200 receptor and CD206 (markers of alternative macrophageactivation) by endometrial macrophages as well as increased expression of GATA-3(the transcription factor regulating TH2 differentiation) byendometrial CD4+ T cells.