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Nederlands

73 (1) 31-38

Titel: 
Prevalence of porcine circovirus 2 (PCV2)-related wasting on Belgian farms with or without a history of postweaning multisystemic wasting syndrome
Auteur(s): 
P. MEERTS, H. NAUWYNCK, R.E. JR. SANCHEZ, B. MATEURSEN, M. PENSAERT
Samenvatting: 
In this study, the prevalence of PMWS affected pigs was determined in three Belgian farms with a history of PMWS and in four control farms with no suspicion of PMWS. The diagnosis of PMWS was based on the fulfillment of all four of the following criteria: the presence of wasting, gross lesions and histopathological lesions suggestive of PMWS and the presence of high PCV2 titers in the lymphoid organs. In the farms with a history of PMWS, 2% of the piglets died of PMWS during the observation period. In the control farms, 0.1% of the piglets were found to be affected with PMWS. Serological examinations showed that all piglets became infected with PCV2 on all farms and no differences in serological profiles were seen between farms or litters with or without PMWS-affected piglets. PRRSV infections were clearly demonstrated in PMWS-affected and non-affected piglets but no correlation was seen between simultaneous infections with PCV2 and PRRSV and the occurrence of PMWS.
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pp 31-38
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73 (1) 17-30

Titel: 
Incarceratie van dunne darm doorheen het foramen omentale (epliploïcum): een retrospectieve studie bij 100 paarden
Auteur(s): 
M. STEENHAUT, A. MARTENS, L. VLAMINCK, G. VERTENTEN
Samenvatting: 
A retrospective study was performed on 100 horses with incarceration of the small intestine through the omental (epiploic) foramen at the Faculty of Veterinary Medicine of Ghent University in Belgium during the period 1994-2001. Preoperative euthanasia was done in 10 horses for different reasons and an explorative laparotomy was performed in 90. Of these ninety horses, 1 died spontaneously during surgical intervention, 10 underwent euthanasia because of the extent of the lesions or a fatal hemorrhage, and surgery was completed on the other 79. A second intervention was necessary in 11 of these 79 horses Simple reduction and reposition of the small intestine was possible in 35 of them, and a resection followed by an intestinal anastomosis was required in the other 44. Forty-four (49%) of the original 90 horses in which surgery was accomplished were discharged from the clinic. Six of these 44 were re-operated. The survival rate in the group of horses that underwent simple reduction was 60% and in the group that underwent resection and anastomosis it was 52%. After discharge from the clinic, 9 of the original 44 horses were lost for follow-up, and the remaining 35 survived for at least 9 months. During the follow-up period (1 to 7 years), 16 horses had one or more bouts of colic, for which reason 5 of them (14%) underwent euthanasia. In this study the mean age of the horses with incarceration of the small intestine through the omental foramen was 9.46 years. Geldings, males and riding horses were clearly more represented. During surgical intervention a medio-lateral incarceration was observed in 98% of the horses. A negative correlation was observed between the survival rate and the length of the incarcerated intestinal segment, on the one hand, and between the survival rate and the distance to the clinic (duration after onset of symptoms) on the other.
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pp 17-30
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73 (2) 119-127

Titel: 
A new test for early pregnancy diagnosis in sheep: determination of ovine pregnancy associated glycoprotein (OVPAG) concentration by means of a homologous radioimmunoassy
Auteur(s): 
S. VERBERCKMOES, L. VANDAELE, S. DE CAT, B. EL AMIRI, J. SULON, L. DUCHATEAU, A. DE KRUIF, J. F. BECKERS, A. VAN SOOM
Samenvatting: 
Early pregnancy diagnosis is a useful tool in the management of sheep breeding. In this study different methods for pregnancy diagnosis in sheep, including the assessment of ovine Pregnancy-Associated Glycoproteins (ovPAGs), are briefly discussed. Subsequently, in a field trial the use of transrectal ultrasound is compared with the assessment of the concentration of ovPAGs for early pregnancy diagnosis. At the start of the breeding season in 2002, 192 Texel ewes at 4 different farms were synchronized and afterwards mated or artificially inseminated (AI). At the moment of synchronization (D-14) and at 25 (D25), 35 (D35) and 45 (D45) days after mating/AI, transrectal ultrasound was performed and blood was collected by jugular vein puncture. The ovPAG concentration in the plasma of the ewes was measured by means of a homologous radioimmunoassay (RIA). The specificity of transrectal ultrasound was 85%, and the sensitivity was 92% at D25, 94% at D35 and 95% at D45. The specificity of the homologous RIA was 100%, and the sensitivity was 99% at D25, and 100% at D35 and D45. Higher ovPAG concentrations were detected at D35 and D45 than at D25 (P<0.01). An interesting finding was that within the same breed (Texel), ovPAG concentrations were significantly affected by the farm (P<0.01). In conclusion, determination of ovPAG concentration by means of homologous RIA can be used for early pregnancy diagnosis in sheep and is more reliable than transrectal ultrasound at 25, 35 or 45 days of gestation.
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pp 119-127
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73 (2) 112-118

Titel: 
Postpartum anoestrus in high yielding dairy cows
Auteur(s): 
G. OPSOMER, M. CORYN, A. DE KRUIF
Samenvatting: 
Worldwide dairy herd fertility has been stated to decline drastically during the latest decades leading to significantly increased calving intervals. The principal likely component of an increased calving interval is the prolongation of the interval parturition-insemination. The latter might be caused by problems related to the modern high yielding dairy cow herself (postpartum endocrinopathies leading to ovarian disturbances), or may reflect serious shortcomings in the management (inadequate heat detection). While bovine practitioners are frequently faced with this problem nowadays, they should be fully aware of the underlying causes of this problem in order to be able to help their clients to attain economically optimal calving intervals. As modern herd health control programs mainly focus on the adjustment of management practices on the herd instead of advising a widespread use of drugs, practitioners should be fully aware of the management practices which influence overall fertility and resumption of ovarian activity in peculiar. The present article reviews the current state of knowledge about the postpartum anoestrus problem in high yielding dairy cows, and hence may serve as a practical guide for the practitioners who want to advice their clients on how to tackle this major fertility problem.
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pp 112-118
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73 (3) 176-181

Titel: 
The use of internal markers to determine metabolizable energy and digestibility of diets in the African Grey Parrot (Psittacus erithacus)
Auteur(s): 
J. SALES, L. DESCHUTTER, G.P.J. JANSSENS
Samenvatting: 
Acid-insoluble ash (AIA) and acid-detergent lignin (ADL) were evaluated as internal markers in digestibility studies with African Grey parrots (Psittacus erithacus erithacus). Apparent metabolizable energy, corrected for nitrogen (N) retention (AMEn), nitrogen retention (NR), and apparent digestibility of dry matter, organic matter, crude protein and crude fat of a commercial seed mixture, sunflower seed, and a commercial pelleted parrot diet were determined using either the method of total collection of feed and excreta or using the marker technique. Both AIA and ADL presented unrealistic negative digestibility values for whole seed diets due to the higher concentration of marker found in the calculated feed intake than in the excreta. This study illustrates the necessity to determine nutrient concentration in feed refusals in digestibility studies with parrots due to the feeding habits of these birds. However, AIA as marker produced digestibility values that, although higher (P < 0.05), showed similar or less variation than the method of total collection when applied to pelleted parrot diets in which feed refusals contain roughly the same nutrient concentration as the feed offered.
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pp 176-181
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73 (3) 170-175

Titel: 
Comparision of slaughter characteristics of "S" and "E"class slaughter bulls of the double-muscled Belgian blue beef breed using a commercial cutting method
Auteur(s): 
F. COOPMAN, A. VAN ZEVEREN, S. DE SMET
Samenvatting: 
According to the SEUROP carcass classification system, double-muscled slaughter bulls of the Belgian Blue beef breed (DM-BBB) are usually classified either as "E" or as "S" carcasses. The large differences in price paid on the market for these two types cannot be explained on the basis of differences in carcass lean meat content resulting from standard dissection methods. In this study, commercial dissection was applied to evaluate the differences between “S” and “E” carcasses. It was concluded that the differences in the proportion of high and low quality meat could not explain the large price differentials. Other factors than carcass composition (size and shape of cuts, meat quality traits) are thus involved.
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pp 170-175
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73 (4) 269-273

Titel: 
Evaluation of the Schirmer tear test in clinically normal Turkish hunting dogs (Turkish Greyhound)
Auteur(s): 
F. ALKAN, C. IZCI, C. TEPELI, Y. KOC
Samenvatting: 
The aim of this study was to determine the normal values for the Schirmer tear test (STT) in Turkish Hunting Dogs. This was performed in order to facilitate the diagnosis of xerophthalmia or keratoconjunctivitis sicca (KCS), which is characterized by deficiencies in tear production and the resulting abnormal STT. Fifteen Turkish Hunting Dogs (8 female and 7 male) were used in this study. The dogs ranged from 6 months to 9 years old (mean 3.6 +2.8) and the mean weight was 21.3 kg (13 to 27). The mean STT-1 and STT-2 values were 17.1 +3.7 mm per minute and 7.7 +2.8 mm per minute, respectively. Neither body weight nor age had a statistically significant effect on these values. There were significant differences in both STT-1 and STT-2 values between females and males (p<0.05), as well as daily and weekly fluctuations for STT-1 and STT-2 values (P<0.01, P<0.05, respectively). This study has shown that the STT-1 and STT-2 values in the Turkish Hunting Dogs are normally distributed and are significantly affected by sex and by measurement sequences.
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pp 269-273
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73 (4) 260-268

Titel: 
The vaginal microflora and canine herpesvirus 1 antibody titers throughout the estrous cycle of breeding bitches
Auteur(s): 
B. FEYEN, A. VAN SOOM, H. NAUWYNCK, L. A. DEVRIESE, A. DECOSTERE, B. CATRY, J. DEWULF, A. DE KRUIF
Samenvatting: 
The objective of this study was to make a qualitative and quantitative assessment of the vaginal microflora during the estrous cycle of 34 bitches from kennels with and without fertility disorders, in order to study whether any particular bacterial species is isolated more often in the kennels of low fertility status in general or during a specific stage of the estrous cycle. Furthermore, a serological follow-up of CHV1 antibody titers was performed to determine whether seroconversion, as a result of (re)infection or reactivation, occurs during a particular stage of the estrous cycle and, if so, how it affects fertility. The number of bacteria isolated was significantly influenced by the stage of the estrous cycle. Bacterial counts were higher during pro-estrus and estrus. In the individual bitch the flora changed during the estrous cycle but when all samples were compared, no specific bacterial species could be associated with a given stage of the estrous cycle. No significant differences were found between bitches from kennels with and without reproductive disorders. In all but one bitch, the serum-neutralizing (SN) antibody titers to CHV1 did not change during the estrous cycle. In the one bitch that seroconverted, no effect on the fertility status was found. It was concluded that no correlation between the aerobic vaginal bacterial flora and/or CHV1 and fertility could be demonstrated.
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pp 260-268
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73 (5) 331-340

Titel: 
Survey van mondaandoeningen bij katten in Vlaanderen
Auteur(s): 
L. VERHAERT, C. VAN WETTER
Samenvatting: 
Een onderzoek naar de aanwezigheid van mondziekten bij 753 katten aangeboden voor algemeen onderzoek bijelf Vlaamse dierenartsen, wordt gepresenteerd. Slechts 87 van deze katten werden aangeboden voor een mond -aandoening. Het mogelijk effect van leeftijd, geslacht, voeding, ras en levensstijl op het voorkomen van deverschillende mondaandoeningen werd onderzocht. Uit de resultaten bleek dat de meeste katten uit het onderzoekleden aan parodontale aandoeningen (gingivitis, parodontitis), en dat parodontitis meer voorkwam bij ouderekatten dan bij jongere. Hoewel het hier een jonge populatie betrof (gemiddelde leeftijd 4,5 jaar), en er nietroutinematig gebruik werd gemaakt van radiografisch onderzoek, had één kat op vier last van resorptieve letsels(FORL). Andere ziekten die werden genoteerd, zijn congenitale/erfelijke aandoeningen, trauma, proliferaties enstomatitis. De resultaten van dit onderzoek tonen aan dat mondziekten zeer vaak voorkomen bij de kat en dat demond daarom veel meer aandacht zou moeten krijgen in de dagelijkse dierenartsenpraktijk.
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pp 331-340
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73 (5) 325-330

Titel: 
Evaluatie van een nieuwe genotyperingstest voor de codons 136-154-171 van het schapenprionproteïne (PRNP) gen met behulp van "Reverse Hybridization"
Auteur(s): 
H. DE BOSSCHERE, S. ROELS, C. RENARD, T. BRIERS, J. DE SLOOVERE, E. VANOPDENBOSCH
Samenvatting: 
Een nieuwe genotyperingstest voor de condons 136-154-171 van het schapenprionproteïne (PRNP) gen viadetectie van mutaties in het PrP-gen met behulp van “reverse hybridization” werd geëvalueerd op niet-gestoldbloed en hersenweefsel. In totaal werden 100 bloedstalen en 28 hersenstalen onderzocht. Al deze stalen werdendaarna geconfirmeerd met “denaturating gradient gel electrophoresis” en “real-time polymerase chain reaction”.De resultaten van deze drie testen kwamen zeer goed overeen. In dit artikel wordt kort het gebruik van deze nieuwegenotyperingstest besproken.
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pp 325-330
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