New mite-borne virus isolates from rakkyo,shallot and wild leek species   总被引：2，自引：0，他引：2  

Paul van Dijk  René A. A. van der Vlugt 《European journal of plant pathology / European Foundation for Plant Pathology》1994,100(3-4):269-277

Flexuous viruses were transmitted from rakkyo (Allium chinense) and wild leek species (especiallyA. commutatum) to plants of crow garlic (A. vineale), by transfer of dry bulb mites. By electron microscope decoration tests using three antisera and by inoculations onto test plants, it was concluded that from each of the two natural host species at least two viruses were isolated. The viruses from wild leeks are both pathogenic onAllium spp. and may be of economic importance. Decoration tests on a virus mixture from shallot obtained earlier, revealed another new mite-borne virus in this species. The mite-borne viruses ofAllium spp. appear to be very common; they are largely diverse and their identification remains difficult.  相似文献   

Book review     

J. W. L. van Vuurde 《European journal of plant pathology / European Foundation for Plant Pathology》1987,93(4):200-200

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Effects of postweaning dietary energy source on reproductive traits in primiparous sows   总被引：2，自引：0，他引：2  

van den Brand H  Langendijk P  Soede NM  Kemp B 《Journal of animal science》2001,79(2):420-426

An experiment was conducted to study the effects of major dietary energy source fed from weaning to ovulation or from ovulation to d 35 of pregnancy on reproductive traits in primiparous sows. Dietary energy sources were used to manipulate the plasma insulin concentration. One hundred thirteen sows were used in a split-plot design. From weaning to ovulation sows were fed at two times maintenance either a diet with tallow (Fat) or maize starch plus dextrose (Starch) as the major energy source. From ovulation onward, sows within each dietary group were alternately reassigned to either the Fat or the Starch diet and were fed at 1.25 times maintenance. Estrus detection was performed three times a day from d 3 to 9 after weaning and sows were inseminated each day of standing estrus. On d 35 of pregnancy, the sows were slaughtered and their reproductive tracts were removed. Plasma insulin concentration was higher in sows fed the Starch-rich diet than in sows fed the Fat-rich diet on d 4 after weaning (1.30 vs 0.97 ng/mL, P = 0.08) and on d 32 of pregnancy (1.20 vs 0.51 ng/mL, P < 0.001). Plasma glucose and IGF-I concentration on d 4 after weaning and d 32 of pregnancy did not differ between sows on the two dietary energy sources. The percentage of sows exhibiting estrus within 9 d after weaning was 52 and 67% for the Fat and Starch diet before ovulation, respectively (P = 0.11), whereas the weaning-to-estrus interval was 134 vs 123 h, respectively (P = 0.12). Survival analysis showed that sows fed the Fat-rich diet had a 1.6 times higher risk to remain anestrous until d 9 after weaning than sows fed the Starch-rich diet (P = 0.04). No effect of dietary energy source, either before or after ovulation, on uterine, placental, or embryonal development on d 35 of pregnancy was found. It can be concluded that the dietary energy source provided after weaning can affect the risk of sows to remain anestrous but does not affect uterine, placental, or embryonic traits.  相似文献   

Epidemiological investigations into the sources of Salmonella contamination of pork     

Swanenburg M  Berends BR  Urlings HA  Snijders JM  van Knapen F 《Berliner und Münchener tier?rztliche Wochenschrift》2001,114(9-10):356-359

This study was conducted to elucidate which phases of the pork production chain contribute to the Salmonella contamination on pork after slaughter. During 7 sampling days, samples were collected of randomly selected slaughter pigs and of pigs from selected Salmonella-infected and Salmonella-free herds, trucks, lairages, and slaughterlines, in two slaughterhouses. Salmonella genotypes, present on pork after slaughter, were compared with Salmonella types, present on the farm, in the truck, in the lairage, on slaughter equipment, and in pigs from other herds. Results showed that the slaughterline was the most important source of Salmonella contamination of carcasses. The farm was the most important source of contamination of livers, tongues, rectal samples and mesenterial lymphnodes, for pigs originating from sero-positive herds. The lairage was the most important contamination source for pigs originating from sero-negative herds, for all samples, except carcasses. It is recommended to avoid each direct or indirect contact between different herds along the whole pork production chain, especially between Salmonella-infected and Salmonella-free herds.  相似文献   

Diagnosis of cerebellar cortical degeneration in a Scottish terrier using magnetic resonance imaging     

van der Merwe LL  Lane E 《The Journal of small animal practice》2001,42(8):409-412

Primary cerebellar cortical degeneration (CCD), also termed abiotrophy, is the spontaneous premature degeneration of fully differentiated neurological tissue. Cerebellar hypoplasia shares many morphological features with primary CCD, both conditions being characterised by decreased cerebellar size, with reduced numbers of Purkinje and granular cells. CCD has been identified in many canine breeds. This is the first report of the syndrome in a Scottish terrier. The patient presented with mild, gradually progressive ataxia. Survey radiographs of the cervical spine and cerebrospinal fluid (CSF) analysis were normal. CSF distemper and Toxoplasma titres were negative. A diagnosis of cerebellar atrophy was made based on magnetic resonance imaging. The progressive clinical signs suggested cerebellar degeneration rather than hypoplasia. On necropsy, the cerebellum showed macroscopic and microscopic changes consistent with primary CCD.  相似文献   

Is the carrying out of educational fetotomy in the living animal by a student ethical?     

van der Weijden GC 《Tijdschrift voor diergeneeskunde》2001,126(5):139-140

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Artificial insemination     

van Lieshout JA 《Tijdschrift voor diergeneeskunde》2001,126(2):51-54

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Interview with Dr. Ingrid van der Gaag. 'Fortunately, I don't need much sleep.' (Interview by Sophie Deleu)     

van der Gaag I 《Tijdschrift voor diergeneeskunde》2001,126(22):728-729

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Cooperative veterinarian in search and rescue cases must be well considered     

van Wessum R 《Tijdschrift voor diergeneeskunde》2001,126(14-15):491

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Morbillivirus in common seals stranded on the coasts of Belgium and northern France during summer 1998     

Jauniaux T  Boseret G  Desmecht M  Haelters J  Manteca C  Tavernier J  van Gompel J  Coignoul F 《The Veterinary record》2001,148(19):587-591

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