Table 6.

Botanicals whose action on the endogenous phase has been assessed by in vitro invasion assays (essential oil, EO; Madin Darby Bovine Kidney, MDBK).

Compound	Concentration	Eimeria spp.	Method	Reference
Allicin	1.8 × 10−3–1.8 × 103 µg/mL	E. tenella	Infection on MDBK and qPCR detection	[89]
Betaine	0.5 µg/mL	E. tenella	Infection on MDBK and count in HE stain	[85]
Carvacrol	20 µg/mL	E. tenella	Infection on MDBK and count in HE stain	[85]
Curcumin	73.6 µg/mL	E. tenella	Infection on MDBK and flow cytometry quantification	[84]
Curcumin	0.2 µg/mL	E. tenella	Infection on MDBK and count in HE stain	[85]
Echinacea purpurea extract	2 µg/mL	E. tenella	Infection on MDBK and count in HE stain	[85]
Garlic EO	50 µg/mL	E. tenella	Infection on MDBK and qPCR detection	[88]
Oregano EO	100 µg/mL	E. tenella	Infection on MDBK and qPCR detection	[88]
Saponins	10 µg/mL	E. tenella, E. acervulina, E. brunetti	Infection on MDBK and extracellular counts and qPCR	[87]
Thymol and carvacrol	14 µg/mL	E. tenella, E. acervulina, E. brunetti	Infection on MDBK and extracellular counts and qPCR	[87]
Thonningia sanguinea extract	625–40,000 µg/mL	E. tenella, E. necatrix	Infection on MDBK and counts Giemsa stain	[90]