摘要:

Brains of 112 ground squirrels (Citellus richardsoni), 10 hawks, one burrowing owl, three pheasants, four crows, nine rats (eightMus decumanusand oneM.rattus) two wild ducks, two jack rabbits, three hens, three pigs, and two cats were examined for the presence of virus. Spleens of 15 ground squirrels and livers of three others, also spleens of five hawks and six rats were examined. Six assassin bugs (oneZelus audaxand fiveSinea diadema), 133 mosquitoes, 30Stomoxyssp., 10Tabanidae, 30 crickets, 64 grasshoppers, and 12 ticks (Dermacentor andersoniStiles) were also examined in suitable sized lots.Two guinea pigs were injected with a suspension of each lot. If suspicious temperature reactions occurred, these animals were destroyed and suspensions of their brains were injected into other guinea pigs. All the injected animals that survived, regardless of whether or not they had shown any temperature reaction, were given a challenge inoculation of 25 M.L.D. of Western virus three weeks or longer after the first injection.Lot 21, consisting of two ground squirrel brains, was the only group to give any evidence suggestive of the presence of virus. Virus could not be isolated from this lot but temperatures of the injected guinea pigs, and subsequent resistance of the survivor to a challenge inoculation, were very suggestive of its presence. This is the second occasion on which results suggested the presence of virus in very small amount in ground squirrel brains.

ISSN:1923-4287    

DOI:10.1139/cjr42d-027

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

The list includes 82 species of birds from Canada's eastern Arctic. Opportunity for field observation was afforded the authors, separately, during two voyages of theNascopie(1938 and 1939). Annotations concern numbers, dates of occurrences, habits, and distribution. Notable range extensions are recorded. Taxonomic notes are based on comparisons of a collection secured in 1938 and on additional unreported material recently acquired from the region by the Division of Birds, Royal Ontario Museum of Zoology.

ISSN:1923-4287    

DOI:10.1139/cjr42d-028

出版商:NRC Research Press    

年代:1942

数据来源: NRC

摘要:

Studies have been made on the anaemia and cythaemolytic icterus produced by 60 and 70 gm. doses of phenothiazine to horses weighing approximately 1200 lb. The continued and prolonged haemolytic effect of a single dose may be serious in a horse having a large proportion of microcytic erythrocytes. No evidence of damage to the liver was obtained, but clinical observations confirm a previous report that severe injury to the urinary system may result from a dose of 60 gm. of phenothiazine to a 1200 lb. horse.A dose of 30 gm. removed all the strongyloid nematodes and did not cause haemolysis. Less than half the dose could be recovered from the excreta of treated animals. The effects of phenothiazine on horses are similar to those of sulphanilamide and sulphapyridine in susceptible humans. The possibility of over-stimulation of the spleen with the consequent hyperactivity causing prolonged haemolysis is mentioned.

ISSN:1923-4287    

DOI:10.1139/cjr42d-029

出版商:NRC Research Press    

年代:1942

数据来源: NRC