References of "Point Vétérinaire"
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See detailFacteurs d'influence du protocole GPG
Hanzen, Christian ULg; Boudry, B.

in Point Vétérinaire (2004), 35(243), 52-55

The stage of the oestrus cycle at which the GPG protocol is instigated affects the results obtained and justifies presynchronisation treatments to increase the number of animals that are within the 5(th ... [more ▼]

The stage of the oestrus cycle at which the GPG protocol is instigated affects the results obtained and justifies presynchronisation treatments to increase the number of animals that are within the 5(th) and 12(th) day of the cycle, which is the optimal period of treatment. Increased fertility, especially in multipara animals was observed. An inverse relation between fertility and the diameter of the follicle present at the time of prostaglandin administration or second injection of GnRH was described. However, it seems that the type of gonadorelin used, the dose or the timing of injection in relation with the PgF(2alpha), does not affect fertility The effect of the timing of insemination in relation to the second injection of GnRH is significant. This interval influences the rate of fertility and embryonic or foetal death and the sex-ratio. [less ▲]

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See detailFaire face à une suspicion de parvovirose canine
Thiry, Etienne ULg

in Point Vétérinaire (2003), 34(236, Suppl. S), 39633

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See detailInduction et synchronisation de l'oestrus par la PGF2alpha
Hanzen, Christian ULg; Boudry, B.; Drion, Pierre ULg

in Point Vétérinaire (2003), 34(236), 22-23

Hormonal management of reproduction uses treatments that regulate both luteal activity and follicular growth to achieve expulsion in the shortest period of an oocyte capable of being fertilised. Therefore ... [more ▼]

Hormonal management of reproduction uses treatments that regulate both luteal activity and follicular growth to achieve expulsion in the shortest period of an oocyte capable of being fertilised. Therefore, PgF2alpha has been the object of numerous trials either as sin e or repeated injections, alone or in association with other hormones such as gonadorelin. Systematic insemination is more difficult after a single injection because return to ea is variable. A single injection is better for the physiology of follicular growth than the corpus luteum. Use of a double injection of PgF2alpha improves the degree of synchronisation but doesn't affect the ovulation rate. [less ▲]

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See detailEffets du protocole GPG sur l’activité ovarienne
Hanzen, Christian ULg; Boudry, B.; Drion, Pierre ULg

in Point Vétérinaire (2003), 34(237), 26-30

The GPG protocol or OvSynch includes an injection of GnRH and followed seven days later by an injection of PgF(2alpha), which is preceded forty-eight hours earlier by a second injection of GnRH. The ... [more ▼]

The GPG protocol or OvSynch includes an injection of GnRH and followed seven days later by an injection of PgF(2alpha), which is preceded forty-eight hours earlier by a second injection of GnRH. The effects of GnRH on follicular tissue are either ovulation or luteinization depending at which stage of the cycle the cow is injected i.e. metoestrus, dioestrus or end of dioestrus. Observation of one or the other effect suggests a close association between the stage of follicular development, the function of the follicular tissue present and also the concentration of progesterone. [less ▲]

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See detailOptimisation du protocole GPG
Hanzen, Christian ULg; Boudry, B.

in Point Vétérinaire (2003), 34(240), 44-46

Les facteurs susceptibles d’influencer les performances de reproduction permises par le protocole GPG sont multiples. L’apparition de l’oestrus et sa durée, la fréquence de l’ovulation, la croissance ... [more ▼]

Les facteurs susceptibles d’influencer les performances de reproduction permises par le protocole GPG sont multiples. L’apparition de l’oestrus et sa durée, la fréquence de l’ovulation, la croissance folliculaire, tout comme la progestéronémie, sont susceptibles d’être influencés par le stade du cycle auquel le protocole est mis en place. Le taux de gestation est d’autant plus élevé que la proportion d’animaux en anoestrus dans le troupeau est faible. Ceci explique sans doute en partie pourquoi la fertilité se trouve améliorée lorsque l’insémination suivant le traitement est effectuée après le 75e jour de lactation. De même, des résultats préliminaires confirment l’application potentielle du protocole au traitement des kystes ovariens. [less ▲]

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See detailProtocole GPG et succès de reproduction
Hanzen, Christian ULg; Boudry, B.; Bouchard, E.

in Point Vétérinaire (2003), 34(238, AUG-SEP), 50-54

In cows, an average success rate of 32% for artificial insemination is obtained using the ovulation synchronisation GPG protocol in cows. This percentage is similar to that obtained in the same conditions ... [more ▼]

In cows, an average success rate of 32% for artificial insemination is obtained using the ovulation synchronisation GPG protocol in cows. This percentage is similar to that obtained in the same conditions after insemination of observed heat (32.6%) and slightly better to that obtained after synchronisation of heat using one or two doses of PgF(2alpha) (26,9 and 28.8%). The protocol has a positive effect on fertility expressed as the percentage of gravid cows four months after calving. The protocol may cause early return to oestrus, either after the first injection of GnRH or after the PgF(2alpha) injection. In heifers, the protocol induces a shortening of the cycle, which suggests that further research is needed on the interval between injections. The protocol does not result in a higher percentage of multiple ovulation. Embryonic mortality is about 7%. [less ▲]

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See detailInfection de ruminants par des herpèsvirus hétérolgogues
Thiry, Etienne ULg; Lemaire, Mylène

in Point Vétérinaire (2002), 32

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See detailLes herpèsviroses des petits ruminants
Thiry, Etienne ULg; Keuser, Véronique; Tempesta, Maria

in Point Vétérinaire (2002), 33(74-76),

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See detailPestiviroses des petits ruminants. La maladie des frontières chez les ovins
Thiry, Etienne ULg; Buonavoglia, C.

in Point Vétérinaire (2002), 33

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See detailla fièvre aphteuse : rappels épidémiologiques et cliniques
Thiry, Etienne ULg

in Point Vétérinaire (2001), 32

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See detailInfections virales humaines d'origine alimentaire
Scipioni, Alexandra ULg; Daube, Georges ULg; Thiry, Etienne ULg

in Point Vétérinaire (2001), 32

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See detailHuman viral infections derived from food
Scipioni, Alexandra ULg; Daube, Georges ULg; Thiry, Etienne ULg

in Point Vétérinaire (2001), 32(218, AUG-SEP),

Several viruses may be transmitted to humans via food including hepatitis A and E virus (VHA and VHE), Norwalk type calicivirus, rotavirus and astrovirus. Enterovirus and enteric adenovirus may also be ... [more ▼]

Several viruses may be transmitted to humans via food including hepatitis A and E virus (VHA and VHE), Norwalk type calicivirus, rotavirus and astrovirus. Enterovirus and enteric adenovirus may also be transmitted. Sick people or healthy carriers excrete these viruses in their stools. Shellfish and water are the most frequently contaminated foodstuffs. Another route of infection is during handling of food. Detection of these viruses in food is complex for several reasons: the interaction of virus and food makes viral concentration and purification difficult, in vitro culture of these viruses is difficult if not impossible, and the quantity of virus present in the sample is low. Molecular technology (PCR) is the most suitable method of detection. Another method is to choose an indicator of viral faecal contamination. [less ▲]

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See detailLa néosporose chez la chèvre : résultats de deux enquêtes sérologiques dans l'Ouest de la France
Chartier, C.; Baudry, C.; Losson, Bertrand ULg et al

in Point Vétérinaire (2000), 31

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See detailL'infection de la chèvre par l'herpèsvirus caprin de type 1
Engels, M.; Thiry, Etienne ULg

in Point Vétérinaire (2000), 31

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See detailConséquences de l'infection des cervidés par des alpha-herpèsvirus apparentés au virus de l'IBR
Keuser, V.; Thiry, Etienne ULg

in Point Vétérinaire (2000), 31

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See detailLes encéphalopathies à herpèsvirus bovins
Meyer, Gilles; D'Offay, Jean; Thiry, Etienne ULg

in Point Vétérinaire (2000), 31

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See detailL'herpèsvirus bovin de type 4 : virus pathogène ou passager?
Thiry, Etienne ULg; Markine-Goriaynoff, Nicolas; Minner, Frédéric et al

in Point Vétérinaire (2000), 31

Bovine herpesvirus type 4 (BHV-4) is a ubiquitous herpesvirus in cattle. It has been isolated from animals showing a wide variety of clinical signs but few of the isolates have proven experimental ... [more ▼]

Bovine herpesvirus type 4 (BHV-4) is a ubiquitous herpesvirus in cattle. It has been isolated from animals showing a wide variety of clinical signs but few of the isolates have proven experimental pathogenicity. Species that are susceptible to BHV-4 include animals other than ruminants, notably cats and, surprisingly, a primate the owl monkey (Aotus trivirgatus). BHV-4 exists as a latent infection in mononuclear cells. In cattle, BHV-4 has been isolated in animals exhibiting ocular and respiratory conditions and it has been found in females with genital tract conditions such as post-partum metritis and vulvovaginitis. There is some epidemiological and experimental evidence that BHV-4 may be a cause of bovine abortion. There is no vaccine available in Europe and prevention is exclusively by hygiene measures. [less ▲]

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See detailLes conséquences de l'infection des bovins par le virus de la rhinotrachéite infectieuse bovine
Thiry, Etienne ULg; Lemaire, Mylène; Schynts, Frédéric et al

in Point Vétérinaire (1999), 30

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See detailEléments du diagnostic des parasitoses externes des ruminants
Lonneux, J. F.; Losson, Bertrand ULg

in Point Vétérinaire (1998), 188

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See detailLes infections utérines dans l’espèce bovine : 2. Thérapeutiques anti-infectieuses et hormonales
Hanzen, Christian ULg; Houtain, J. Y.; Laurent, Y.

in Point Vétérinaire (1996), 28(numéro spécial), 1019-1025

The choice of an antibiotic or antiseptic treatment must take into account, the administrative route, the individual factors (nature of symptoms, stage postpartum, stage in the cycle) and the agents used ... [more ▼]

The choice of an antibiotic or antiseptic treatment must take into account, the administrative route, the individual factors (nature of symptoms, stage postpartum, stage in the cycle) and the agents used (nature of germs, minimal inhibiting concentration, pharmacological properties, milk residue). Hormonal treatment is an interesting alternative, which must be considered on an individual basis rather than systematically at herd level. For prevention, it should only be used on animals presenting a high risk factor of infection [less ▲]

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