Factors associated with variation in Neospora caninum bulk-milk S/P ratios in initially bulk-milk negative testing Dutch dairy herds     

Bartels CJ  van Schaik G  van Maanen K  Wouda W  Dijkstra T 《Preventive veterinary medicine》2007,81(4):265-273

We conducted a study on 81 initially bulk-milk ELISA negative dairy herds taken from a random sample of Dutch dairy herds to evaluate variation in bulk-milk S/P ratios and to study reasons for bulk-milk conversion. These herds were repeatedly (3-month intervals) tested between April 2004 and August 2005 and serostatus of all animals had previously been established as negative (N), low-positive (LP) or high-positive (HP). Of these herds, herd- and test-related factors associated with variation in sample over positive (S/P) ratios were analysed using a multivariable linear-mixed model with ‘herd’ as random effect. In addition, changes of animal serostatus in converting herds were described. S/P ratios were calculated as the optical density of the bulk-milk sample minus the optical density of the negative serum control divided by the difference in optical density between the positive and negative serum control.

Sixteen bulk-milk conversions in 12 dairy herds were seen with few indications of serological conversion in lactating cattle except for one herd in which recrudescence of infection appeared likely in nine cows. The effect of HP serostatus on bulk-milk S/P ratio was 2–3 times stronger compared with LP serostatus. In addition, bulk-milk S/P-ratio increased when the proportion of HP animals between 1 and 60 days in milk increased and decreased when the average milk-production level of the herd increased. Besides these herd-related factors, the use of different ELISA-testkits between test rounds had a significant effect on the S/P-ratio in bulk-milk samples.  相似文献   

Non-payment of veterinary bills in The Netherlands     

Endenburg N  van Harsselaar M 《Tijdschrift voor diergeneeskunde》2007,132(22):860-865

Non-payment of bills is a phenomenon that has grave economic consequences for all entrepreneurs, veterinary practitioners included. Little in depth research has been performed into the non-payment of veterinary bills. The aim of this study was to quantify the non-payment of bills in Dutch veterinary practices and to investigate the procedures implemented in the case of non-payment and their effectiveness. Non-payment of bills is a potential source of a substantial loss of income in Dutch veterinary practices. Even though veterinarians actively tried to collect the money owed them, often bills were paid very late or were paid in part only.  相似文献   

Constructive and intense interactions with the committee     

van Maanen K 《Tijdschrift voor diergeneeskunde》2007,132(19):773-774

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Are you as a veterinarian allowed to advertise for veterinary drugs?     

van Herten J 《Tijdschrift voor diergeneeskunde》2007,132(22):884-885

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Health insurance for dogs and cats     

van Herten J 《Tijdschrift voor diergeneeskunde》2007,132(13):533-537

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Foot and mouth disease and bluetongue: differences and similarities     

Dekker A  Dercksen D  Snoep J  van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701

On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures.  相似文献   

Salvinia plants in trade: what species are we actually talking about?     

Johan L. C. H. van Valkenburg  Laurens F. Piet  Edu Boer 《EPPO Bulletin》2023,53(1):108-116

Incorrect labelling of plants in trade and misidentification are widespread. Likewise, in trade numerous names are being used for the ornamental aquatic plant known as ‘Kariba weed’, but rarely the correct scientific name Salvinia molesta Mitch. For inspection services of EPPO member countries, correct identification of S. molesta has become important since the species was added to the EPPO A2 List and the List of Union concern in accordance with EU regulation 1143/2014 based on an EPPO Pest Risk Analysis (PRA) for the species. Inspections and a targetted survey of Salvinia plants in trade in the Netherlands were performed and additional material was obtained from wild sources in South Africa, Hungary and the United States. Specimen identification was verified by comparison with the herbarium collection at Naturalis Biodiversity Center in Leiden and with the sequences available in NCBI GenBank database. This paper provides the tools to correctly identity the relevant Salvinia species.  相似文献   

Seasonal turnover and insights into the overwintering biology of wireworms (Coleoptera: Elateridae) in the Canadian Prairies     

Ivan Drahun  Elise A. Poole  Katherine A. Hunt  Willem G. van Herk  Christophe M. LeMoine  Bryan J. Cassone 《Pest management science》2023,79(2):526-536

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Reference intervals for plasma,urinary, and salivary concentrations of free metanephrines in dogs: Relevance to the diagnosis of pheochromocytoma     

Marit F. van den Berg  Hans S. Kooistra  Guy C. M. Grinwis  Sebastiaan A. van Nimwegen  Martijn van Faassen  Ido P. Kema  Erik Teske  Sara Galac 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(1):173-183

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Effect of sirolimus on insulin dynamics in horses     

Demia J. de Tonnerre  Carlos E. Medina Torres  Darko Stefanovski  Mary A. Robinson  Kate L. Kemp  François-René Bertin  Andrew W. van Eps 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2023,37(2):703-712

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