Figure 4: Tissue tropism of SINV-1, SINV-2, and SINV-3 among larval and worker S. invicta ants. Virus was quantified by real-time PCR. Color key reflects the proportion of the total for each virus detected in each tissue. (ND = not detected). Tissue key is identical for all viruses, H: head; Th: thorax; C: crop; Mg: midgut; Hg: hindgut; PS: poison sac; Mt: Malpighian tubules; AbC: abdominal carcass, AC: alimentary canal; Car: carcass.