Table 2. The effect of the sigma virus compared to bacterial and fungal infection on gene expression.

Sigma virus infected flies		Bacteria and fungus infected males
Sex	Change expression	Up-regulateda	Down-regulateda	No change
Female	Up-regulatedb	2	0	38
	Down-regulatedb	4	7	67
	No change	77	69	3264
Male	Up-regulatedb	5	5	230
	Down-regulatedb	13	12	277
	No change	89	81	3743
Combined	Up-regulatedb	7	5	266
	Down-regulatedb	14	17	319
	No change	93	80	4447

Only genes included in both datasets are shown. There is no significant association between the two datasets in any of the three comparisons (Fisher Exact tests on 2×2 contingency tables of genes showing a significant change in expression).

^aIn the list of 400 ‘Drosophila Immune Related Genes’ identified by De Gregorio [28].

^bSignificant at P<0.02.