| presumptive dirofilariasis in a pale-headed saki monkey (pithecia pithecia). | a 6-yr-old male pale-headed saki monkey (pithecia pithecia), born at the dallas zoo, reentered the collection in 1994 after it was housed for 4 yr in rhode island and 2 yr in florida. the monkey tested negative for both dirofilaria immitis microfilariae and d. immitis adult antigens (via commercially available tests) upon return. however, it tested positive for adult antigens 1 yr later, and additional testing, including ultrasonography, suggested a diagnosis of aberrant dirofilariasis. relevant ... | 1998 | 9638626 |