Chromosome Changes Induced by Infections in Tissues of Rhynchosciara angelae.

The main effects of two infections, one by a protozoan and the other by a virus, in cells of Rhynchosciara angelae (Diptera, Sciaridae) are an increase in cell size and changes in the size, shape, and behavior of the chromosomes. The X chromosome of some cells reacts differently from the autosome to the protozoan infection. Some chromosomes show specific, easily traceable points after infection by the virus. Some of the effects of these infections may be similar to the effects of infective agents in other organisms.