Seabirds mortality during the 1992-1993 winter along the Belgian coastJauniaux, Thierry ; ; Farnir, Frédéric et alin Annales de Médecine Vétérinaire (1996), 140(3), 149- During the 1992-1993 133 seabirds found on Belgian beaches were necropsied. Most frequent species were the guillemot (Uria aalge), the oystercatcher (Haematopus ostralegus), the kittiwake (Rissa ... [more ▼] During the 1992-1993 133 seabirds found on Belgian beaches were necropsied. Most frequent species were the guillemot (Uria aalge), the oystercatcher (Haematopus ostralegus), the kittiwake (Rissa tridactyla), the razorbill (Alca torda) and the herring gull (Larus argentatus). The three main observations were, in decreasing order, cachexia, acute and hemorrhagic gastroenteritis, and oil contamination of plumage and intestinal tract. The pelagic origin of seabirds was associated with all 3 observations; oil contamination was associated with acute gastro-enteritis and cachexia and, finally, the immature character was associated with cachexia. A hypothetical mechanism of death would be oiled pelagic seabirds that become cachectic and die of acute gastroenteritis. It is unlikely that seabirds act as a reservoir for bacteria, that were only occasionally identified in our material. Therefore, it appears that infectious agents play a minor role in seabirds stranding. [less ▲] Detailed reference viewed: 15 (0 ULg) A study of the relationships between parasite counts, lesions and daily weight gains in Psoroptes ovis infested in cattle; ; et al Conference (1995) Detailed reference viewed: 4 (2 ULg) Kinetics of a specific antibody response after successful treatment in naturally Psoroptes ovis infested cattle; ; et al Conference (1995) Detailed reference viewed: 2 (0 ULg) Field efficacy of pour-on and injectable formulations of moxidectin and ivermectin in Psoroptes ovis infested cattle: parasitological, clinical and serological data; Losson, Bertrand ; Mignon, Bernard et alConference (1995) Detailed reference viewed: 2 (1 ULg) Prevalence and characterization of Microsporum canis asymptomatic carriage in catsMignon, Bernard ; Losson, Bertrand ![]() Poster (1995) Detailed reference viewed: 14 (1 ULg) The efficacy of a phyto-aromatic ear gel against auricular mange in rabbits and carnivoresMignon, Bernard ; Losson, Bertrand ![]() Conference (1995) Detailed reference viewed: 7 (1 ULg) Eight cases of otodectic mange cured with a phyto-aromatic ear gel (CanidorTM): an alternative to classical treatmentsMignon, Bernard ; Losson, Bertrand ![]() Conference (1994) Detailed reference viewed: 7 (2 ULg) Field Efficacy of Injectable Moxidectin in Cattle Naturally Infested with Chorioptes Bovis and Sarcoptes ScabieiLosson, Bertrand ; in Veterinary Parasitology (1993), 51(1-2), 113-21 Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Chorioptes bovis and Sarcoptes scabiei. Eight animals were allocated to two groups of four ... [more ▼] Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Chorioptes bovis and Sarcoptes scabiei. Eight animals were allocated to two groups of four animals each, based on parasitological and clinical status. Animals of the treated group received one subcutaneous injection of injectable moxidectin at 0.2 mg kg-1 body weight on Day 0. Individuals of the control group received emergency treatment of a single injection of moxidectin at 0.2 mg kg-1 body weight on Day 28. Efficacy was assessed by (a) taking skin samples from each animal on Days 0, 7, 14, 21, 28, 42 and 56 and observing the numbers of viable mite stages and species and (b) clinical examination of animals on Days 7, 14, 21, 28, 42 and 56 with the percentage of affected body surface calculated for each animal on Days 0, 28 and 56. On the basis of the geometric means from treated and control animals, the percentage reductions in the total numbers of living C. bovis mites on Days 7, 14, 21 and 28 were 69, 87, more than 99 and 98, respectively. However, at the end of the trial, only two animals were negative for C. bovis. The percentage reductions in the total numbers of S. scabiei on Days 7, 14, 21 and 28 were 93, 100, 100 and 100, respectively. Clinical indices of the treated animals showed a sharp decrease in the affected body surface area from a mean of 43.6% on Day 0 to 0.9% and 0% on Days 28 and 56, respectively.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲] Detailed reference viewed: 17 (3 ULg) Hypersensitivity reactions in cattle infested with Psoroptes ovis: demonstration of specific IgE by homologous passive cutaneous anaphylaxisMignon, Bernard ; ; Losson, Bertrand ![]() Conference (1993) Detailed reference viewed: 8 (1 ULg) The efficacy of Cydectin 0.5% Pour-on against Hypoderma bovis in naturally infested cattle: parasitological and serological dataMignon, Bernard ; ; Losson, Bertrand ![]() Conference (1993) Detailed reference viewed: 16 (1 ULg) Field Efficacy of Injectable and Pour-on Moxidectin in Cattle Naturally Infested with Psoroptes Ovis (Acarina: Psoroptidae); Losson, Bertrand ![]() in Veterinary Parasitology (1992), 45(1-2), 147-52 Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Psoroptes ovis. Three groups of six animals were used based on parasitological and clinical ... [more ▼] Field efficacy of moxidectin, a macrocyclic lactone endectocide, was evaluated in cattle naturally infested with Psoroptes ovis. Three groups of six animals were used based on parasitological and clinical status. Group 1 animals received one subcutaneous injection of injectable moxidectin at 0.2 mg kg-1 body weight; Group 2 animals received topically one dose of 0.5 mg kg-1 body weight of pour-on moxidectin; Group 3 individuals remained untreated as controls. Efficacy was assessed by (a) taking skin samples from each animal on Days -4, 14, 28, 42 and 56 post-treatment (PT) and observing numbers of viable mite stages and species and (b) clinical examination of animals on Days 14, 28, 42 and 56 with the percentage of affected body surface calculated for each animal on Days -4, 28 and 56. Both formulations gave 100% efficacy as no live mites were found in Groups 1 or 2, 14, 28 and 56 days after treatment. Clinical indices showed a sharp decrease in the affected body surface area from a mean of 5.48% and 6.1% on Day -4 in Groups 1 and 2, respectively, to 0% in both groups on Days 28 and 56 PT. All untreated animals remained positive until Day 28. The clinical condition of the controls worsened rapidly during the experiment (mean clinical index: 2.87% and 13.05% on Days -4 and 28, respectively) and they were given an emergency treatment on Day 28. No side-effects were observed with either formulation.(ABSTRACT TRUNCATED AT 250 WORDS) [less ▲] Detailed reference viewed: 9 (4 ULg) Enquête sur l'infestation du renard roux (Vulpes vulpes) par Echinococcus multilocularis en province de Luxembourg (Belgique); ; Losson, Bertrand et alin Annales de Médecine Vétérinaire (1992), 136 Detailed reference viewed: 14 (0 ULg) Etude de l'influence de facteurs alimentaires, sanitaires ou d'exploitation sur la production laitière et les performances de reproduction du bétail laitier. I. Méthodologie et résultatsIstasse, Louis ; ; Hanzen, Christian et alin Annales de Médecine Vétérinaire (1990), 134 Detailed reference viewed: 57 (7 ULg) Confirmation de la présence de Neospora caninum en Belgique; ; et al in Annales de Médecine Vétérinaire (1990) Detailed reference viewed: 4 (0 ULg) Babesia divergens: activité de l'oxytétracycline retard chez la gerbille, Meriones unguiculatusLosson, Bertrand ; in Annales de Recherches Vétérinaires = Annals of Veterinary Research (1989), 20(4), 501-7 The authors studied the prophylactic activity of long-acting oxytetracycline in the gerbil, Meriones unguiculatus, infected with the cattle piroplasm Babesia divergens. Parasitemia, packed cell volume ... [more ▼] The authors studied the prophylactic activity of long-acting oxytetracycline in the gerbil, Meriones unguiculatus, infected with the cattle piroplasm Babesia divergens. Parasitemia, packed cell volume (PCV) and survival rate were monitored. At 5 and 20 mg/kg, the prophylactic activity was absent and all the animals died. At 40 mg/kg, two animals out of five survived but were clinically affected and sustained a severe hemolytic anaemia. However, at 80 mg/kg, the parasitemias remained very low, the PCV's were unchanged and all the animals survived; furthermore, they were totally resistant to a challenge infection given 33 days after the primary infection. There is a good agreement between these results and those reported in cattle naturally or experimentally infected with B. divergens. [less ▲] Detailed reference viewed: 122 (0 ULg) Haematological and Immunological Response of Unrestrained Cattle to Psoroptes Ovis, the Sheep Scab MiteLosson, Bertrand ; ; in Research in Veterinary Science (1988), 44(2), 197-201 Cows were infected twice with 600 and 500 nymphs and adults of a bovine strain of Psoroptes ovis with a nine-week interval. The haematological response and the non-specific mitogen- and antigen-induced ... [more ▼] Cows were infected twice with 600 and 500 nymphs and adults of a bovine strain of Psoroptes ovis with a nine-week interval. The haematological response and the non-specific mitogen- and antigen-induced responsiveness of the peripheral blood lymphocytes of the animals was followed. Dermal reactivity to P ovis antigen injection was studied five weeks after reinfection. After the first infection with 600 mites none of the infected animals developed clinical psoroptic mange but a leucocytosis developed, contributed to primarily by an eosinophilia and by a slight lymphocytosis. Antigen-induced lymphocyte blastogenesis was used to measure the antigen-sensitive cell population in peripheral blood and this population showed a maximum increase 10 days after infection; however, antigen-sensitive cells remained above normal levels until reinfection. Upon challenge infection with 500 mites the infected animals showed an immediate hypersensitivity type reaction with a marked pruritus, scratching and exudation. Thereafter the lesions healed rapidly and none of the animals developed clinical mange. This clinical reaction was accompanied by a secondary eosinophilia but no change was apparent in the other blood elements. A marked increase in the blastogenic response of the peripheral blood lymphocytes was also apparent and this peaked three weeks after challenge. Following the intradermal injection of P ovis antigen there was an immediate swelling of the injection site in all infected and control animals and skin thickness was maximal one hour after injection. Thereafter there was a clear distinction in dermal reactions between P ovis infected and control animals; after 48 hours reactions were not seen in the control animals while marked dermal reactions were still present in the P ovis infected group. [less ▲] Detailed reference viewed: 7 (0 ULg) |
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