CXCL8 and susceptibility to pneumonia measurement: Using PCR-DNA sequence verdicts, the TLR2 (354 bp), CLEC4E (443 bp), PTX3 (363 bp), CXCL8 (300 bp), SOCS3 (480 bp) and IL15RA (378 bp) genes were found to have different SNPs in the amplified DNA bases linked to pneumonia.