Macrorhabdus ornithogaster Infection and Spontaneous Proventricular Adenocarcinoma in Budgerigars (Melopsittacus undulatus)
نویسندگان
چکیده
منابع مشابه
Avian Polyomavirus Infection in Budgerigars (Melopsittacus undulatus) in Turkey*
Twenty-five young budgerigars that died with the complaints of abdominal distension and crop swelling were examined pathologically. One hundred and twelve, 8-19-day-old chicks died at the same aviary with the same clinical symptoms over 16 months; the morbidity and mortality rate was 100%. Ascites, hydropericardium, crop and oesophagus ulcers, cardiomegaly, splenomegaly, hepatomegaly and focal ...
متن کاملBrightness Discrimination in Budgerigars (Melopsittacus undulatus)
Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is relatively poor for unknown reasons. Contrast sensitivity describes the detection of gratings of varying spatial frequency. It is unclear whether bird brightness discrimination between large uniform fields is poor as well. Here we show that budgerigars (Melopsittacus undulat...
متن کاملEdge Detection in Landing Budgerigars (Melopsittacus undulatus)
BACKGROUND While considerable scientific effort has been devoted to studying how birds navigate over long distances, relatively little is known about how targets are detected, obstacles are avoided and smooth landings are orchestrated. Here we examine how visual features in the environment, such as contrasting edges, determine where a bird will land. METHODOLOGY/PRINCIPAL FINDINGS Landing in ...
متن کاملExperimental toxoplasmosis in budgerigars (Melopsittacus undulatus).
The susceptibility of budgerigars (Melopsittacus undulatus) to graded doses of Toxoplasma gondii oocysts was studied. Sixteen budgerigars were divided into 4 groups (A-D) of 4 each. Birds in groups A-C were fed 100,000, 1,000, or 100 infective oocysts of the VEG strain of T. gondii, respectively. Budgerigars in group D were not fed oocysts and served as controls. All 4 birds in group A died (or...
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ژورنال
عنوان ژورنال: Veterinary Pathology
سال: 2019
ISSN: 0300-9858,1544-2217
DOI: 10.1177/0300985818823773