Faecal egg counts (FECs) in two groups of West African Dwarf goats separated into low and high FEC (strong and weak responder) groups/phenotypes on the basis of their FEC until day 52 after the commencement of the escalating (immunising) infections with Haemonchus contortus. All points are based on n = 14, except D31, D35 and D42 (n = 12) and D38 (n = 13) in the low FEC group, and D45 (n = 13) in the high FEC group. All the animals received the same relatively heavy doses of the immunising infection as follows: 500 L3 on day 0 (d0), 1000 on d7, 2000 on d14, 3000 on d21 and 4000 on d28 (total number of L3 = 10,500). For further details see Chiejina et al. [14].