Table 2. Sample sizes, means (± SE) of different infestation parameters in resident brood of Italian and Russian honey bee colonies, and results of the student’s t-tests.

Parameters	Italian	Russian	P-values
Number of test colonies	14	32
Number of cells examined	4,525	21,896
Number of cells examined per colony	348 ± 76	644 ± 53
% Infested cells	14.42 ± 3.10a	6.02 ± 1.14b	< 0.001
% Multiply infested brood	7.69 ± 2.40	3.57 ± 0.80	0.059 ns
% NR foundresses	4.36 ± 1.33b	13.11 ± 1.84a	< 0.010
% Infested cells recapped	64.36 ± 6.46b	77.81 ± 3.79a	< 0.001
Number of progeny per fertile foundress
Recapped	3.96 ± 0.11a	3.81 ± 0.08b	< 0.001
Not recapped	3.86 ± 0.15a	3.79 ± 0.20b	< 0.001
Overall	3.94 ± 0.12a	3.80 ± 0.07b	< 0.001
Mite Load
Recapped	5.28 ± 0.25a	4.48 ± 0.13b	< 0.001
Not recapped	4.70 ± 0.21a	4.16 ± 0.23b	< 0.001
Overall	5.05 ± 0.16a	4.41 ± 0.11b	< 0.001

NR = no progeny. Rows with different letters are significantly different at P < 0.05.

ns = not significant.