Table 2. Infectivity of dengue virus in Colony Forming Unit cells picked from human bone marrow^a.

Days P.I.	0b	1	3	5	7	10
CFU-other cells	74c	215	198	136	124	103
Fold Increased	0	190.5	167.6	83.3	67.6	39.2
CFU-Megakaryocytes	82	114	363	145	92	26
Fold Increase	0	39.5	344.3	77.5	12.1	0
CFU-Erythroid	3530	1000	657	433	194	0
Fold Increase	0	0	0	0	0	0

^aCells were characterized based-upon their morphology and giemsa staining characteristics.

^bDay 0 means the time point 2 hours after adsorption, in which culture supernatants were extensively washed for unbound virus. The amount of residual virus in the culture supernatant was determined and used as the baseline.

^cQuantification determined by qRT-PCR (unadjusted copy number per 140 µlof the supernatant).

^dThe fold increase relative to the viral titer at Day 0, supernatant at 2 hours post-infection, was calculated.