PTX4 and infection: After 72 h, the number of immune genes that were modulated by the infection was also low, with the only overexpressed genes being pentraxin 4 (ptx4), viperin or radical S-adenosyl methionine domain-containing protein 2 (rsad), complement component c3 (co3) and complement c1q tumour necrosis factor-related protein 1 (c1qt1) (Table 2).