CGN1 is the first gene in the bovine collectin locus, a 260-kb region on chromosome 28 which includes the CL46, CL43, SFTPD, MBL1, and SFTPA1 genes (Gjerstorff et al. 2004a), and several of these genes have been implicated in infectious disease susceptibility. The gene discussed is SFTPD; the disease is infectious disease.