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A description is given of the pathomorphology and pathomorphogenesis of a bacterial infection of the proventriculus of canaries. The cause appeared to be a large, rod-shaped, Grampositive bacterium, in which no spore formation could be observed. Cultivation in vitro has not as yet been achieved. Thirty % of the 30 canaries examined contained this bacterium(More)
Medical x-ray images are increasingly stored and transmitted in a digital format. To reduce the required storage space and transmission bandwidth, data compression can be applied. In this paper we describe a new method for data compression of cardio-angiographie x-ray image series. The method is based on so-called overlappedtransform coding. A comparison(More)
With the accepted use of (lossy) data compression at low compression factors (2, 3 and 4 on the Philips DCI), the question was posed whether higher lossy compression ratios can also be used without statistically affecting the results of quantitative coronary arteriography. In this study the influence of two data compression schemes (LOT and JPEG) at three(More)
The hygienic aspects of the various breeding systems are reviewed. The companion aviary is the least hygienic system; the birds are hardest to supervise in this case. Breeding in pairs is preferable from either point of view. Hygiene in aviaries is determined by all component parts of the cage, which are used in keeping the birds. The walls should be smooth(More)
Nephroblastomas seem to be very rare in animals with mesonephritic kidneys (fishes and amphibia), although immense numbers of many species are kept as pets and in laboratories. A single case was recorded in the steelhead trout (5). The steelhead trout (Salmo gairdneri, Rich.) is the same species as the rainbow trout, differing only in that it spends part of(More)
Methods, whether or not acceptable in the correct killing of fish, amphibians, reptiles or birds, are reviewed. The acceptable or unacceptable character of each of these techniques is commented upon. The techniques are differentiated into mechanical, chemical and physical methods. Of all mechanical techniques, rendering an animal unconscious by a sharp blow(More)
In a specified pathogen free (SPF) breeding colony of IIIVO/JU rabbits 8 cases of prolapsus vaginae occurred in 5 years. Clinically the animals were in shock. Haematocrits ranged from 9 to 15%. The prolapses started from the submucosal layer of the proximal part of the vestibulum vaginae. The prolapsed tissue consisted of over-expanded blood-sinuses.(More)