| blood parasites of some waterfowl from victoria, australia. | a total of 316 anatids (5 species) from serendip wildlife research station, lara, victoria, were examined for blood parasites. twenty-two of the ducks (all five species) harbored haemoproteus nettionis and one also harbored plasmodium relictum. none of 12 dusky moorhens (gallinula tenebrosa) were infected. there was no significant difference in the prevalence of h. nettionis between species or age groups of ducks. no evidence of infection with leucocytozoon, trypanosoma or microfilaria was obtai ... | 1977 | 405511 |
| blood parasites of mallard and pintail ducks from central alberta and the mackenzie delta, northwest territories. | blood films from 60 mallard (anas platyrhynchos) and 67 pintail (a. acuta) ducks, collected in alberta and the mackenzie delta, northwest territories, during 1973 and 1974, were examined for blood parasites. twenty-two (37%) of the mallards and fourteen (21%) of the pintails were infected with one or more species of hematozoa. infections of leucocytozon simondi occurred more frequently (86%) than haemoproteus nettionis (22%) in the infected birds. trypanosoma avium occurred in one individual of ... | 1977 | 410954 |
| susceptibility of pekin and muscovy ducks to haemoproteus nettionis. | domestic muscovy (caririna moschata) and pekin (anas platyrhynchos) ducklings were exposed to or injected with homogenates of culicoides flies collected at white pine, michigan. gametocytes of haemoproteus nettionis were detected in both species of ducks at 16 days post-exposure. culicoides downesi was indicated as a vector of h. nettionis in northern michigan. blood infections occurred with a higher prevalence and reached a higher intensity in muscovy ducks. endogenous tissue stages of h. netti ... | 1984 | 6429353 |
| blood parasitemia in a south texas wintering waterfowl population. | eleven species of wintering waterfowl were trapped on the welder wildlife foundation, san patricio county, texas, between october, 1976 and may, 1977. blood films were made from 580 ducks. leucocytozoon simondi, haemoproteus nettionis, plasmodium circumflexum, and a microfilaria were found in three species. these blood parasites occurred in 70 lesser scaups (aythya affinis), 12 blue-winged teals (anas discors), and 3 ring-necked ducks (aythya collaris). there was no difference in the rates of i ... | 1980 | 6768901 |
| hematozoa of wood ducks (aix spons) in the atlantic flyway. | a total of 213 wood ducks (aix sponsa) from 24 localities in 12 states in the atlantic flyway was examined for blood parasites in 1976 and 1977. hematozoa were present in birds from every collection site from virginia northward to maine. only one infection was detected in birds from north carolina southward to florida. haemoproteus nettionis was the most common parasite, occurring in 56% of the northern wood ducks; leucocytozoon simondi (20%), plasmodium circumflexum (6%), and microfilariae (18% ... | 1980 | 6774111 |
| hematozoa of mallard ducks (anas platyrhynchos) of the pacific flyway, washington. | blood smears from 837 mallard ducks (anas platyrhynchos), collected during january and february from various locales in washington during the period 1974-1977, were examined for hematozoa. of these, 339 (40.5%) harbored blood parasites: leucocytozoon simondi was the most common, occurring in 24.4% of the birds, followed by haemoproteus nettionis (23.4%). microfilariae were found in 14 birds (1.7%). | 1980 | 6780700 |
| blood parasites of prairie anatids and their implication in waterfowl management in alberta and saskatchewan. | information on the blood parasites occurring in 3,866 anatids of 14 species collected from five locations in alberta and saskatchewan during 1976-80 is summarized. an overall prevalence of 26% with avian hematozoa was recorded. leucocytozoon simondi was the most frequently encountered parasite, occurring in 17% of the ducks; haemoproteus nettionis was observed in 11% of the birds while plasmodium circumflexum and microfilariae (probably of splendidofilaria fallisensis) occurred in only 2% and le ... | 1982 | 6813511 |
| blood parasites of trumpeter swans, olor buccinator (richardson), from alberta. | a total of 75 trumpeter swans (olor buccinator (richardson) from the grande prairie region of alberta was examined for hematozoa; 26 (34.6%) swans were infected with haemoproteus nettionis. a single infection of leucocytozoon simondi and two of plasmodium circumflexum also were recorded. local, second year (sy) and adult (ahy) female swans had closely similar rates of hematozoan infection; the sy and ahy male swans had substantially higher infection rates than other subgroups. | 1981 | 7241706 |
| nematocera (ceratopogonidae, psychodidae, simuliidae and culicidae) and control methods. | the biology, veterinary importance and control of certain nematocera are described and discussed. culicoides spp. (family ceratopogonidae) transmit the arboviruses of bluetongue (bt), african horse sickness (ahs), bovine ephemeral fever (bef) and akabane. some other arboviruses have been isolated from these species, while fowl pox has been transmitted experimentally by culicoides. these insects are vectors of the parasitic protozoans leucocytozoon caulleryi and haemoproteus nettionis, and the pa ... | 1994 | 7711309 |
| hematozoa of wood ducks (aix sponsa) in missouri. | we examined 371 wood ducks (aix sponsa) for hematozoa from two localities in missouri (usa) in 1989 and 1990. thirty-seven (10%) harbored one or more species of blood parasites. haemoproteus nettionis was the most common parasite, occurring in 36 (10%) of the birds. leucocytozoon simondi was found in two (0.5%) and microfilaria occurred in five (1%) of the wood ducks examined. infections were more prevalent in adults (18%) than in immature birds (2%). there was no difference in prevalence betwee ... | 1994 | 8151821 |
| haemoproteus greineri in wood ducks from the atlantic flyway. | thin smears of blood were examined from 157 wood ducks (aix sponsa) trapped at savannah national wildlife refuge (south carolina, usa) and harris neck national wildlife refuge (georgia, usa) during spring and summer, 1994 and 1995. thirteen wood ducks (8%) were infected with blood parasites. eleven of these birds were infected with haemoproteus nettionis, seven with leucocytozoon simondi, and five with unidentified microfilariae. additionally, eight wood ducks (5%) were infected with haemoproteu ... | 1997 | 9131576 |
| hematozoa of waterfowl from michigan. | two hundred eighteen and 127 wild waterfowl (anatidae) of five species were sampled from the kellogg biological station area (michigan, usa) during the summer (1 june to 24 august 1995) and fall (9 september to 8 october 1995), respectively. twelve (6%) of those sampled in summer and 13 (11%) sampled in the fall were infected with hemosporids. haemoproteus nettionis, haemoproteus greineri, and leucocytozoon simondi infected both summer and fall birds, with h. nettionis the most common (4% summer ... | 2000 | 11085442 |