IL10 and infection: After 14 days post-infection, Th2 cytokines (IL-10 and IL-5) increased with PPD stimulation in lung cells from Mtb K-infected mice compared to those from Mtb H37Rv-infected mice, and Th1 cytokine production decreased at 112 days post-infection in Mtb K-infected mice compared to Mtb H37Rv-infected mice.