Table 1.

Innate immune components of the gut mucosa in finfish.

Component	Regulatory/effectors cells/genes	Reference
Mucus and surface defensins	Muc2	(13)
	Antimicrobial peptides	(14, 15)
	Complement system	(16–19)
Cell types	Goblet cells	(14)
	Macrophages	(6, 7)
	Granulocytes	(6, 7)
	Rodlet cells	(20)
	M-cells	(12)
	Enterocytes	(21, 22)
Pattern recognition receptor	Toll-like receptors	(23, 24)
	Peptidoglycan PRR	(25)
Proinflammatory cytokines	IL-1β	(26, 27)
	TNFα	(28)
	IL-6	(27)
Chemokines	CCR6	(29)
	CCR9B	(29)
	CXCL10	(30)
	CK12	(31)