Bacteria-induced egg hatching differs for Trichuris muris and Trichuris suis

Table 1 Hatching of Trichuris muris and T. suis eggs after incubation with Escherichia coli (BL-21)

	Average hatching percentage (± SD)
Escherichia coli concentration/ml	4 h		24 h
Escherichia coli concentration/ml	T. muris	T. suis	T. muris	T. suis
5 × 10⁸	83.9 (±12.9)	0.1 (±0.1)	80.5 (±16.9)	0.1 (±0.1)
10 × 10⁸	57.0 (±1.4)	0.0 (±0.1)	70.5 (±4.8)	0.1 (±0.1)
20 × 10⁸	13.5 (±4.8)	0.0 (±0.0)	72.0 (±21.8)	0.0 (±0.0)
Controls (no E. coli)	0.0 (±0.0)	0.2 (±0.2)	0.1 (±0.1)	0.2 (±0.2)

Trichuris eggs incubated with three different concentrations of E. coli (BL-21) in RPMI-1640 with 5 % penicillin-streptomycin and 5 % amphotericin B after 4 and 24 h incubation at 36 °C. The controls are Trichuris eggs incubated without the E. coli; n = 4 per group