| a hematologic survey of captive waterfowl. | hematologic parameters were studied in giant canada geese (branta canadensis maxima), mallard ducks (anas platyrhynchos platyrhynchos) and various species of diving ducks at seasinal intervals throughout the year. highest values for packed cell volume, hemoglobin content and erythrocyte counts were found in the winter and pre-nesting periods. mean corpuscular volume and mean corpuscular hemoglobin varied inversely with these values. | 1976 | 933309 |
| the lamina propria of vertebrate seminiferous tubules: a comparative light and electron microscopic investigation. | the lamina propria of the seminiferous tubules was compared by means of light and electron microscopy in specimens obtained from the following vertebrates: mute swan, northern mallard, blackbird, grey short-tailed opossum, north american opossum, european rabbit, mouse, rat, golden hamster, mini pig, bull, llama, roebuck, horse, coati, cat, dog, java monkey, orang utan. the lamina propria consists of basal lamina, ground substance, collagen fibers, fibroblasts and myofibroblasts. myofibroblasts ... | 1990 | 2281881 |
| experimental inoculation of mallard ducks (anas platyrhynchos platyrhynchos) with borrelia burgdorferi. | birds have been incriminated as disseminaters of borrelia burgdorferi and have the potential to spread the organism over a wide geographic range. borrelia burgdorferi has been isolated from the liver and blood of passerine birds and from ixodes dammini removed from passerines. the objective of this study was to determine if waterfowl, specifically mallards (anas platyrhynchos platyrhynchos), were susceptible to infection with b. burgdorferi. eight ducks were inoculated with b. burgdorferi; four ... | 1989 | 2644453 |
| [characterization of campylobacter spp. from wild birds]. | bacteria of the genus campylobacter were isolated from 28 rooks (corvus frugilegus), 1 red kite (milvus milvus), 1 lapwing (vanellus vanellus), 1 coot (fulica atra), 1 common moorhen (gallinula chloropus) and 1 northern mallard (anas platyrhynchos). altogether, c. jejuni biovar 1, was isolated 19x, c. jejuni biovar 2 8x and c. coli 5x. among c. jejuni biovar 1 and 2 there were 5 isolates tolerating a content of 1.5% nacl in the medium. h2s proof of 3 c. jejuni biovar 2 and 1 c. coli isolates res ... | 1989 | 2930449 |
| infection of duck plague carriers with pasteurella multocida and p. anatipestifer. | mallards (anas platyrhynchos platyrhynchos) and white pekin ducks (anas platyrhynchos domesticus) were infected with duck plague virus and challenged with ld20's of pasteurella multocida and p. anatipestifer. there was no difference between mortality rates of duck plague-infected ducks and controls, suggesting that these organisms do not act synergistically under the conditions of our experiments. there was a difference of about 500-fold between the ld20 of p. multocida for mallards and that for ... | 1987 | 3034230 |
| the amino-acid sequence of northern mallard (anas platyrhynchos platyrhynchos) hemoglobin. | the complete amino-acid sequence of the major hemoglobin component (hba) of the adult northern mallard (anas platyrhynchos platyrhynchos) is presented. a minor component hbd was also detected but in low concentrations. the sequences of alpha a- and beta-chains were established by automatic edman degradation on tryptic peptides and peptides obtained by specific chemical cleavages. the alignment of the peptides was performed by comparison with the alpha a- and beta-chains of greylag goose hemoglob ... | 1983 | 6884992 |
| [the effect of praziquantel on trichobilharzia (digenea, schistosomatidae), a cause of swimmer's dermatitis in humans]. | cases of swimmer's itch caused by cercariae of the genus trichobilharzia have spread during the last years in southwestern germany and increased in intensity. the only consequence was to forbid swimming because no effective strategies are known which would be ecologically or financially acceptable. in this examination we therefore tried, by means of medication of ducks, the possible final hosts, to kill the different stages of trichobilharzia in patency and prepatency in order to interrupt the p ... | 1993 | 8220576 |
| avian influenza a viruses in birds --an ecological, ornithological and virological view. | avian influenza a viruses (aiv) are the causative agents of the presently most important poultry disease. ten countries in asia and several other countries in eastern europe suffer high losses from the lethal effects of these viruses of the h5n1 subtype. aiv of other subtypes cause in additional countries severe losses. the threat to health and well-being of the avifauna, domestic poultry and possibly mammals including humans are worldwide of major concern. the european union reacted with a comp ... | 2005 | 16425630 |
| the exceptionally rare (sic) common scoter. | a 1-month-old infant with congenital heart disease underwent initial cardiac surgery (mee shunt) at day 20 but was later readmitted because of poor shunt flow and hypoxemia. despite therapy, the infant deteriorated and suffered a cardiopulmonary arrest. after 40 minutes of resuscitation, spontaneous cardiac output was reestablished, and subsequently, the child was placed on extracorporeal circulation membrane oxygen (ecmo) support. the infant deteriorated further over the next 3 days with persis ... | 2006 | 17161174 |
| the role of mallard ducks (anas platyrhynchos) in distribution and germination of seeds of the submerged hydrophytenajas marina l. | the effect of passage ofnajas marina l. seeds through the digestive system of the common mallard duck (anas platyrhynchos) on their germinability was investigated. most of the seeds (∼70%), which were consumed by the birds were digested. however, germination of the remaining seeds was remarkably improved. germination of seeds whose seed coats were mechanically cracked was also higher than that of the controls and equalled the germination percentage of the mallard-treated seeds. seeds ofnajas are ... | 1986 | 28311797 |