Summary: A survey was done on otitis externa in animals in Israel. Among 8750 dogs which were brought to the Animal Hospital for various reasons, 4.6% suffered from Otitis externa, 26.7% of which proved to be mycotic infections. Among 4600 pigs which were checked, 1% of the fattened pigs compared with 30% of adult female swine were found to suffer from Otitis externa, out of these 74% had mycotic infections. Only 1 camel out of 186 had Otitis externa associated with Pityrosporum pachydermatis infection. The fungi, isolated from these cases, were: Pityrosporum pachydermatis, Candida, Aspergillus, Geotrichum, Penicillium, Rhizopus, and Mucor spp., as well as Microsporum canis. An unusual finding of Aspergillus flavus heads and sclerotia were found in the ear of a dog, suffering from chronic Otitis externa. Zusammenfassung: Es wird eine Studie über Untersuchungen in Israel von Otitis externa bei Tieren gegeben. Von 8750 Hunden, die wegen verschiedener Ursachen in der Tierklinik vorge‐stellt wurden, litten 4,6% an Otitis externa. Bei dieser erkrankten Gruppe war die Infektion zu 26,7% eine Mykose. Bei 4600 untersuchten Schweinen hatten 30% der ausgewachsenen Säue und 1% der Mastschweine Otitis externa. 74% der erkrankten Schweine hatten Pilzinfektionen in den Ohren. Von 186 untersuchten Kamelen konnte nur bei einem Otitis externa festgestellt werden, diese war mit Pityrosporum pachydermatitis Weidman assoziiert. Die Pike, die wir isolieren konnten, waren: Pityrosporum pachydermatis, Candida, Aspergillus, Geotrichum, Penicillium, Rhizopus und Mucor spp. sowie Microsporum canis. Über einen seltenen Fall von chronischer Ohrentzündung bei einem Hund konnte berichtet werden. Hier fanden sich Köpfe und Sklerotien von Aspergillus flavus Link.
The potential use of monocins for listeria typing was investigated. Monocins are defective phage particles still capable of lysing listerial cells. They were induced by u.v.-irradiation, precipitated with polyethylene glycol and purified by density gradient centrifugation. Using 26 monocins, it was possible to type 48% of Listeria monocytogenes strains, 92% of L. innocua strains and 94% of L. ivanovii strains. Overall typability of 480 strains was 68%. None of the monocins was able to lyse L. grayi. Monocin typing was found to be a valuable supplementary tool for typing strains which were non-typable by the Weihenstephan phage typing set. A combination of phage typing and monocin typing increased overall typability of Listeria strains to 95%.
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