Table 2. Tissue samples positive for vaccinia DNA by qPCR in the study dogs.

Dog	Tissue	Copies/mg of genomic DNA
1	Spleen	9.9 × 105
	Adrenal glands, aorta, bone and joint, epididymis, esophagus, gallbladder, gingiva, heart, kidneys, pancreas, sciatic nerve, pituitary gland, prostate, salivary gland, muscle, testes, thyroid, tongue, trachea	<100
2	Spleen	3.9 × 106
	Lungs	<100

qPCR, quantitative polymerase chain reaction.