Anti-viral activity of red microalgal polysaccharides against retroviruses

Table 4 Focus formation after removal of Porphyridium sp. polysaccharide

Porphyridium sp. polysaccharide	Number of foci¹
	MuSV-124	MuSV/MuLV
Not added	100 ± 6	70 ± 5
Not removed	0	0
Removed at:
0 h after infection	75 ± 7	65 ± 4
24 h after infection	64 ± 6	50 ± 5
72 h after infection	55 ±	20 ± 4

¹Means of five cultures ± SD 100 μg/ml of Porphyridium sp. polysacharide were added 2 h before infection and removed at the indicated times. Foci were scored 12 days postinfection. h means hours.

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