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A field study of the floral biology of Victoria amazonica (Poepp.) Sowerby (Nymphaeaceae) was made for comparison with the many studies made in cultivated plants, of Victoria in the past. In the study areas in the vicinity of Manaus, four species of Dynastid beetles were found in flowers of V. amazonica, three of the genus Cyclocephala and one of Ligyrus. The commonest species of beetle proved to be a new species of Cyclocephala and was found in over 90 percent of the flowers studied. The flowers of V. amazonica attract beetles by their odour and their white colour on the first day that they open. The beetles are trapped in the flower for twenty-four hours and feed on the starchy carpellary appendages. Observations were made of flower temperature, which is elevated up to 11°C above ambient temperature, when the flower emits the odour to attract the beetles. Observations on beetle frequency, the number of floral parts, seed dispersal and the evolutionary development of cantharophily are also presented.

Objectives: A retrospective study is made of the odontogenic infections treated in La Paz University Hospital (Madrid, Spain) during 2007 and 2008, with an epidemiological and microbiological analysis of a large group of patients. Study Design: A retrospective descriptive study was made, involving the consecutive inclusion of all patients with odontogenic infection requiring admission to our hospital in the period between January 2007 and December 2008. Results: A total of 151 patients were included, with a mean age of 40.3 years and a balanced gender distribution. The most frequently affected teeth were those located in the posterior mandibular segments, caries being the main underlying cause. Most isolates comprised mixed flora, particularly viridans streptococci, different species of Prevotella, Micromonas micros, and different species of Actinomyces. Susceptibility analysis of the microbial isolates showed a high percentage resistance to clindamycin (42.8% of all isolates), particularly among viridans streptococci. Conclusions: The use of antibiotics in head and neck infections requires updated protocols based not only on the existing scientific evidence but also on the epidemiological reality of each center. On the other hand, identification is required of the surgical factors determining infection and how they influence morbidity associated with this type of pathology.

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This study exoands the knowledge of phlebotomine Sand fly distribution in the state of Rondônia, Brazil.New state and country records are registered, bringing the total of known sand fly species in Rondônia to 78.

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Resumo De um total de 6337 flebótomos fêmeas dissecados, 466 foram encontrados com flagelados no tubo digestivo. Um total de 28 espécies ou grupos de flebótomos foi dissecado, todavia somente foram encontrados flagelados em seis destas espécies ou grupos de espécies, e destas, somente duas espécies tinham leptómonas que foram definitivamente confirmadas como sendo Leishmania braziliensis. Dezesseis cepas de Le. braziliensis foram isoladas de flebótomos selváticos.