Search

Production of Maggots from By-products in Ivory Coast. Our objectives are the study of the cycle of development of flies living on household refuses and the determination of the most favourable byproducts for their proliferation, particularly at maggot stage. A fly's inventory realized on various household refuses reveals two families: the Calliphoridae (meat flies) which are the most abundant and the Muscidae (houseflies). Calliphoridae and Muscidae development cycle can last about eight to ten days, from oviposition to blossoming, at 35.5-37 °C. They develop preferentially on animal scraps. The productivity in maggots on animal by-products solely is superior to a mixture of animal and vegetable by-products. Maggots proliferate seldom on cassava's semolina, pineapple's peeling, banana's peeling or raw pieces of yam.

Abstract: Myiases are parasitic infections by larvae of flies. The development of intercontinental travels increases the incidence of tropical myiasis in travellers. We report the case of a patient, having recently stayed in Peru, presenting with an inflammatory plate of the right shoulder, covered with small papules with a hole inside. The initial aspect seemed like an erysipelas. Considering the resistance to the antibiotic treatment, the diagnosis of myiase was suspected. The local application of petroleum jelly allowed the exit of nine larvae of Dermatobia hominis and a fast good outcome. In human beings, the number of larvae usually infecting the same individual varies from one to four. This observation is original because of the number of implied larvae, which explains the intensity and the extent of the local inflammatory signs, which first looked like erysipelas. This diagnosis must be suspected in cases of erysipelas resistant to antibiotics in patients back from an endemic area. [Copyright &y& Elsevier]

Introduction: synanthropic flies are sometimes involved in the transmission of diarrheal diseases as mechanical vectors of pathogenic bacteria. The purpose of this study was to assess the diversity of synanthropic flies and to determine their potential involvement in the transmission of diarrheal diseases in the city of Maroua., Methods: fly catching sessions were carried out per season in 12 wards, in five different sites and in three moments of the day, corresponding to the different daily sunshine hours. Multiple keys for the identification of diptera and of microbiological analyzes in the laboratory were used to estimate the biodiversity and the portage of microorganisms by the synanthropic flies. We carried out an ecological and statistical analyses of collected data., Results: eight species of synanthropic flies belonging to four families were identified in the city of Maroua and the distribution of these species varied according to the seasons, sites and moment of the day (p<0.05). Musca domestica and Chrysomya putoria were the most numerous species detected in the sites where the activities of agri-food processing and livestock were intense, notably Hardé, Pont-vert, Doualaré, Kongola and Makabaye. Escherichia coli was more involved than Salmonella spp.in the transmission of diarrheal diseases and the portage of bacteria by synanthropic flies was abundance-dependent., Conclusion: the diversity of synanthropic flies varies as a function of anthropogenic activities, season of the year and moment of the day. These flies are important potential mechanical vectors of fecal pathogenic bacteria in Maroua., Competing Interests: Les auteurs ne déclarent aucun conflit d´intérêts., (Copyright: Daniel Amani Dawaye et al.)

A exploração progressiva dos limites da plasticidade no desenvolvimento de padrões instintivos, levou-nos a comparar a ontogênese do comportamento de limpeza corporal em moscas, submetidas a condições diferentes a partir da eclosão. Atenção especial foi dada àquelas variações e constâncias que pudessem revelar o grau de complexidade da organização comportamental nestes insetos. Encontramos evidências de que é justamente a plasticidade do sistema que é selecionada, ou seja, a possibilidade de ajustamento a condições variadas, ao longo da ontogênese. A ocorrência de movimentos no "vazio", o desenvolvimento subseqüente de padrões "substitutivos" e as potenciais alternâncias destas categorias, sob certas circunstâncias, sugeriram várias idéias sobre a ontogênese, aparentemente incompatíveis com uma concepção de organização comportamental simples e estereotipada, mesmo para os padrões instintivos de insetos.

Reports that in co-operation with Food and Agriculture organization and the International Atomic Energy Agency, Argentina and Chile have implemented programmes of eradication of the Mediterranean fly. Damage of crops by this frugivorous insect; Description of Sterile Insect Technique; Consideration of the installation of manufacturing units of irradiated flies in Brazil, South Africa and Portugal.