FIG 4.

Growth of Palenque-A770 compared to that of MSI-7 in proposed vertebrate host species. Primary fibroblasts derived from a gray catbird (D. carolinensis, GC2), a mourning dove (Z. macroura, MD11), and a house sparrow (P. domesticus, HS1), as well as cells derived from a cotton rat (S. hispidus; S-his-Lu, S-his-Ki cells), a free-tailed bat (T. brasiliensis; Tb1 Lu, Tb2 Lu), a fruit bat (C. perspicillata; C-per-Lu, C-per-Ki), and a grass frog (R. pipiens; ICR2-A) were infected with MSI-7 (A, C) or Palenque-A770 (B, D) virus at an MOI of 0.1. Each MOI was measured in independent duplicates. Numbers of virus genome copies per milliliter (cop/ml) of cell culture supernatant were measured by one-step real-time RT-PCR over 6-day periods. Supernatant of MD11 was removed over 3-day periods. Where no standard deviation is shown, the scale is too small to be visible.