Only 6 species of gram-positive bacteria were isolated. From P.
americana, 4 species of bacteria were isolated from the alimentary
tract and 1 from the external surface. Moreover, 3 species were isolated
from the alimentary tract and 2 from the external surface of B.
germanica. Bacillus spp. was the one with the highest isolation rate
and followed by Enterococcus Group D. One strain of Staphylococcus
aureus was isolated from the external surface of P. americana.