Endectocide activity of a new long-action formulation containing 2.25% ivermectin+1.25% abamectin in cattle

The present work aimed to evaluate the endectocide activity of a new injectable long-action formulation, containing ivermectin (IVM) and abamectin (ABA). In each one of the four experiments performed, the following groups were formed: group I: 2.25% IVM (450 mu g/kg) + 1.25% ABA (250 mu g/kg), group II: 3.15% IVM (630 mu g/kg) and group III: control. Eighteen bovine naturally infected by gastrointestinal nematoda were selected for anthelmintic evaluation and necropsied on posttreatment day (PTD) 14 to estimate the total parasitic burden. For the Rhipicephalus (Boophilus) microplus field trial, 30 bovine were selected by means of counts of semi-engorged R. (B.) microplus and the therapeutic and residual efficacy evaluated by tick counts on PTDs 1, 3, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84 and 91. In the stall test, 15 calves were artificially infested with 5000 R. (B.) microplus (Mozzo strain) larvae three times a week and daily collections of all the engorged female ticks detached from each calf were performed until the PTD 80. Forty bovine naturally infected with Dermatobia hominis larvae were selected and the number of larvae was counted by visual and tactile inspection on PTDs 3, 7, 14, 28, 35, 49, 63, 77, 91 and 105. In this trial, a formulation containing 1% doramectin (200 mu g/kg) was also used. IVM + ABA formulation and 3.15% IVM eliminated four of the eight species of nematode identified. The anthelmintic efficacy of the avermectins association against Haemonchus placei, Cooperia spatulata and C. punctata was 89.64%, 98.84% and 97.69%, while 3.15% IVM achieved 30.98%, 84.79% and 75.56%, respectively. The two formulations evaluated showed reduced acaricide action on the PTD I and 3, reaching high efficacy percentages from PTD 14 onward. The IVM + ABA showed efficacy above 95% in the period between PTDs 21 and 49. In the stall test, it observed no difference (P > 0.05) between the two formulations regarding the R. (B.) microplus counts during the entire evaluation period. IVM + ABA reduced the number of ticks from the PTD 1 to 77 (P 0.05) regarding the number of D. hominis larvae and prevented this parasite reestablishment until PTD 105. These results indicate that the IVM + ABA association showed higher anthelmintic activity and similar efficacy against arthropods to the formulation containing 3.15% IVM. (C) 2008 Elsevier B.V. All rights reserved

Detection of Gibberellin-Regulated Protein (Peamaclein) Sensitization among Italian Cypress Pollen-Sensitized Patients

Background and objective: Peach gibberellin-regulated protein (peamaclein) has recently emerged as a relevant food allergen in cypress pollen-hypersensitive patients. Objective: We looked for mono-sensitization to peamaclein among Italian cypress-pollen allergic patients. Material and methods: 835 cypress pollen hypersensitive patients from 28 Italian allergy centers under went thorough interview for food-allergic reactions, and SPT with a commercial peach extracts containing peamaclein. In peach reactors, IgE to rPru p 3 was measured, and those scoring negative were enrolled as potentially mono-sensitized to peamaclein. IgE reactivity to rPru p 7 was evaluated by immunoblot and by an experimental ImmunoCAP with rPru p 7. Results: Peach SPT scored positive in 163 (19.5%) patients but 127 (77,9%) were excluded because Pru p 3 reactors. Twenty-four (14,7%, corresponding to 2.8% of the entire study population) were considered as potentially mono-sensitized to peamaclein. Their distribution did not show any geographic preference. Seventeen/24 (70,8%) had a history of food allergy, in most cases (n=15) to peach. Other offending foods included other Rosaceae, citrus fruits, fig, melon, tree nuts, and kiwi. On peach immunoblot, only 3/18 putative peamaclein allergic subjects reacted to a band at about 7kDa; 4 other patients reacted at about 50-60 kDa. Ten/18 (56%) scored positive for Pru p 7 on ImmunoCAP. Conclusion: Peamaclein allergy and sensitization prevalence seem rare in Italy. Most patients react to peach, albeit other Rosaceae fruits and several citrus fruits may also act as offending foods. Peach and cypress pollen probably share also cross-reacting allergens other than peamaclein

Nematóides resistentes a alguns anti-helmínticos em rebanhos caprinos no Cariri Paraibano Nematode resistant to some anthelmintics in dairy goats in Cariri Paraibano, Brazil

Objetivou-se avaliar a resistência de nematódeos a alguns anti-helmínticos em rebanhos caprinos no Cariri Paraibano. Foram utilizados 144 animais no período seco e 120 animais no período chuvoso, fêmeas com idade acima de oito meses de vida e lactantes, distribuídos em 4 grupos: Grupo I não tratado, Grupo II tratado com albendazole a 10%, Grupo III tratado com ivermectina a 1% e Grupo IV tratado com fosfato de levamisole a 18,8%, nas doses recomendadas pelos fabricantes. Para avaliar a resistência, aplicou-se o teste de redução na contagem de ovos por grama de fezes (RCOF) e o cultivo de larvas de helmintos. As amostras fecais foram coletadas no dia do tratamento (dia base) e 7, 14 e 21 dias após o tratamento. No grupo tratado com Albendazole, observaram-se eficácias de 61%, 11% e 24% no período seco e de 55%, 14% e 12% no período chuvoso, aos 7, 14, e 21 dias, respectivamente. No grupo tratado com Ivermectina, a eficácia foi de 14%, 70% e 66% para o período seco, e de 76%, 34% e 71% para o período chuvoso, aos 7, 14 e 21 dias, respectivamente. O grupo tratado com fosfato de Levamisole apresentou percentuais de eficácia de 89%, 79% e 73% no período seco e de 76%, 69% e 67% no período chuvoso, aos 7, 14 e 21 dias, respectivamente. Os resultados obtidos indicam que os nematódeos gastrintestinais de alguns rebanhos caprinos no Cariri Paraibano não são sensíveis aos princípios ativos Albendazole, Levamisole e Ivermectina. Durante o período de estudo foi identificada a presença de parasitas dos gêneros Haemonchus, Trichostrongylus, Oesophagostomum e Strongyloides.<br>The aim of this paper was to evaluate the resistance of nematodes to some anthelmintics in dairy goats in Cariri Paraibano, Brazil. A total of 144 female goats, over 8 months of age, were used in the dry season and 120 ones during the rainy season, divided into four groups: Group I untreated, Group II treated with albendazole 10%, Group III treated with ivermectin 1%, and Group IV treated with levamisole phosphate 18.8%, at doses recommended by the manufacturer. To evaluate the resistance, the reduction in egg count per gram of feces and the cultivation of larval helminths. The fecal samples were collected on the day of treatment and, after 7, 14 and 21 days of treatment. In the group treated with albendazole, 61%, 11% and 24% of efficiency was observed in the dry period, and 55%, 14% and 12% in the rainy season, at 7, 14, and 21 days respectively. In the group treated with ivermectin, efficacy was 14%, 70% and 66% for the dry period, and 76%, 34% and 71% for the rainy season, at 7, 14 and 21 days respectively. The group treated with phosphate Levamisole showed efficacy rates of 89%, 79% and 73% in the dry period, and 76%, 69% and 67% in the rainy season, at 7, 14 and 21 days. The results indicate that the gastrointestinal nematodes of some dairy goats in Cariri Paraibano are not sensitive to the active Albendazole, Levamisole and Ivermectin. During the study, presence of specimens of the genera Haemonchus, Trichostrongylus, Oesophagostomum and Strongyloides was identified

Detection of Gibberellin-regulated protein (Peamaclein) sensitization among Italian cypress pollen-sensitized patients

Background and objective: Peach gibberellin-regulated protein (peamaclein) has recently emerged as a relevant food allergen in cypress pollen-hypersensitive patients. Objective: We looked for mono-sensitization to peamaclein among Italian cypress-pollen allergic patients. Material and methods: 835 cypress pollen hypersensitive patients from 28 Italian allergy centers under went thorough interview for food-allergic reactions, and SPT with a commercial peach extracts containing peamaclein. In peach reactors, IgE to rPru p 3 was measured, and those scoring negative were enrolled as potentially mono-sensitized to peamaclein. IgE reactivity to rPru p 7 was evaluated by immunoblot and by an experimental ImmunoCAP with rPru p 7. Results: Peach SPT scored positive in 163 (19.5%) patients but 127 (77,9%) were excluded because Pru p 3 reactors. Twenty-four (14,7%, corresponding to 2.8% of the entire study population) were considered as potentially mono-sensitized to peamaclein. Their distribution did not show any geographic preference. Seventeen/24 (70,8%) had a history of food allergy, in most cases (n=15) to peach. Other offending foods included other Rosaceae, citrus fruits, fig, melon, tree nuts, and kiwi. On peach immunoblot, only 3/18 putative peamaclein allergic subjects reacted to a band at about 7kDa; 4 other patients reacted at about 50-60 kDa. Ten/18 (56%) scored positive for Pru p 7 on ImmunoCAP. Conclusion: Peamaclein allergy and sensitization prevalence seem rare in Italy. Most patients react to peach, albeit other Rosaceae fruits and several citrus fruits may also act as offending foods. Peach and cypress pollen probably share also cross-reacting allergens other than peamaclein