An up-regulation of the transcription of the IL-13 receptor (Il13ra1) was observed by 15 min post Δ-mce1 H37Rv-infection however, a corresponding change in the concentration of IL-13 measured in the supernatant could not be detected during the first hour post Δ-mce1 H37Rv-infection. The gene discussed is IL13RA1; the disease is infection.