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In the present study, we describe a series of 23 cases of ocular subconjunctival parasitic granulomas in dogs, admitted to the Clinic of Surgery, Faculty of Veterinary Medicine of the Aristotle University of Thessaloniki, Greece, between 1997 and 2000. The ophthalmic manifestations in all animals were periorbital swelling, discomfort, photophobia, conjunctival congestion, and discharge. A more detailed examination revealed the presence of periocular masses (nodules) on the subconjunctival bulbar space. Granulomatous or cyst-like formations were extracted surgically, and were found to contain thread-like nematode parasites. A histologic and parasitologic examination of tissues and parasites was carried out. Diagnosis of parasitic granulomas was made and the parasite was identified as Onchocerca sp. This is the largest series of cases reported of aberrant Onchocerca infections in dogs coming from one geographic location.

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Three trials were conducted to evaluate the effect of supplementation of a basal diet with benzoic acid or thymol or a mixture of essential oil blends (MEO) or a combination of benzoic acid with MEO (BMEO) on growth performance of turkey poults. Control groups were fed a basal diet. In trial 1, benzoic acid was supplied at levels of 300 and 1,000 mg/kg. In trial 2, thymol or the MEO were supplied at levels of 30 mg/kg. In trial 3, the combination of benzoic acid with MEO was evaluated. Benzoic acid, MEO and BMEO improved performance, increased lactic acid bacteria populations and decreased coliform bacteria in the caeca. Thymol, MEO and BMEO improved antioxidant status of turkeys. Benzoic acid and BMEO reduced the buffering capacity compared to control feed and the pH values of the caecal content. Benzoic acid and EOs may be suggested as an effective alternative to AGP in turkeys.

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