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Cytopathic effects of SIVagm and HIV-1 on human macrophages. Macrophages prepared from human PBMC were infected with medium alone (A), HIV-1/Ba-L (B), SIVagm(sab-4ln) (C), or SIVagm(sab-4br) (D). Cultures are shown at day 14 postinfection. Magnification, ×40.
