Materials and Methods Anesthetic: Tribromoethanol was formulated according to the
directions given in Table 1 and stored at 4 C in 10 ml aliquots for up to 4 months. The dose
used was approximately 0.2 ml/10 g (240 mg/kg) body weight given intraperitoneally (ip).
Mice: Virus-antibody-free (VAF) animals were housed in microisolator cages in a
conventional AAALAC-approved animal facility. Animals were maintained VAF (determined
by periodic screening for murine virus antibodies) for the duration of the study. Groups of …