| the occurrence of mycoplasmas in selected wild north american waterfowl. | we determined the prevalence of mycoplasma infection in breeding mallard (anas platyrhynchos) and canvasback (aythya valisineria) hens and their broods from the central united states (1988 to 1990); and wintering american black duck (anas rubripes) and mallard hens from the eastern united states (1990 to 1993). mycoplasmas were isolated by culturing tracheal swabs from 656 live birds and tissue samples from 112 dead waterfowl. nine (18%) of 51 mycoplasma isolates were identified as mycoplasma an ... | 1995 | 8592358 |