Fleas as parasites of the family Canidae

Historically, flea-borne diseases are among the most important medical diseases of humans. Plague and murine typhus are known for centuries while the last years brought some new flea-transmitted pathogens, like R. felis and Bartonella henselae. Dogs may play an essential or an accidental role in the natural transmission cycle of flea-borne pathogens. They support the growth of some of the pathogens or they serve as transport vehicles for infected fleas between their natural reservoirs and humans. More than 15 different flea species have been described in domestic dogs thus far. Several other species have been found to be associated with wild canids. Fleas found on dogs originate from rodents, birds, insectivores and from other Carnivora. Dogs therefore may serve as ideal bridging hosts for the introduction of flea-borne diseases from nature to home. In addition to their role as ectoparasites they cause nuisance for humans and animals and may be the cause for severe allergic reactions

Actinomicetes cultivables asociados a microecosistemas liqu\ue9nicos de la selva templada valdiviana, Argentina

Se aislaron veintitrés (23) cepas de actinomicetes cultivables de la especie corticícola Pseudocyphellaria berberina presente en la selva templada valdiviana, Argentina, veitiún (21) fueron endoliquénicas y dos (2) ectoliquénicas. Se identificaton diecisiete (17) cepas de los géneros, Actinoplanes (2), Dactylosporangium (1), aff. Pseudonocardia (1), Micromonospora (6), aff. Micromonospora (1), Streptomyces (5) y Streptosporangium (1). Este es el primer registro para la Argentina de actinomicetes aislados de hongos liquenizados.Cultivable actinomycetes associated to lichenized microecosystems from the temperate Valdivian rainforests, Argentina. Twenty-three (23) cultivable strains of actinomycetes were isolated from the corticolous lichen species Pseudocyphellaria berberina present in the Valdivian temperate rainforest, Argentina, being twenty-one (21) endolichenic and two (2) ectolichenic. Seventeen (17) strains were identified as belonging to genera Actinoplanes (2), Dactylosporangium (1), aff. Pseudonocardia (1), Micromonospora (6), aff. Micromonospora (1) and Streptomyces (5), Streptosporangoium (1). This is the first record of actinomycetes isolated from lichenized fungi for Argentina.Fil: Scervino, Jose Martin. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; ArgentinaFil: Messuti, Maria Ines. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; ArgentinaFil: Solans, Mariana. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; ArgentinaFil: Vobis, Gernot. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación en Biodiversidad y Medioambiente; Argentin