RESUMEN
Solifugae possess an evertable, adhesive pedipalpal organ (suctorial organ) at the tip of the distal tarsus of each pedipalp that is unique among arachnids. When inverted inside the pedipalp, the suctorial organ is covered with two cuticular lips, a dorsal upper lip and a ventral lower lip, but it can be protruded rapidly in order to facilitate grasping prey or climbing on bushes or even climbing on smooth surfaces due to its remarkable adhesive properties. In this study, the suctorial organs of different species from old world families Galeodidae and Karschiidae and new world families Ammotrechidae and Eremobatidae were investigated by means of light microscopy, scanning and transmission electron microscopy. In all representatives, the suctorial organ is formed by an evertable, cuticular pad with a complex internal stabilizing structure. The procuticle of this pad consists of a lattice-like basal plate and numerous stalked structures connected to this basal plate. The shafts of the stalked structures are regularly organized and ramify apically. The surface of the suctorial organ is constituted of a very thin epicuticle overlaying the ramifying apices forming ridges and furrows on the ventral side of the suctorial organ.
Asunto(s)
Arácnidos/anatomía & histología , Arácnidos/ultraestructura , Extremidades/anatomía & histología , Órganos de los Sentidos/anatomía & histología , Órganos de los Sentidos/ultraestructura , AnimalesRESUMEN
Three children who developed pulmonary aspergillosis while being treated for leukaemia or non-Hodgkin's lymphoma. Each child continued with intensive myelosuppressive chemotherapy regimens during the infection and each was successfully treated with antifungal prophylaxis based on itraconazole by mouth. Amphotericin B was also given during periods of severe neutropenia. No reactivation of the fungal infection was seen.
Asunto(s)
Antineoplásicos/efectos adversos , Aspergilosis/prevención & control , Enfermedades Pulmonares Fúngicas/prevención & control , Infecciones Oportunistas/prevención & control , Anfotericina B/uso terapéutico , Aspergilosis/diagnóstico por imagen , Preescolar , Quimioterapia Combinada , Humanos , Itraconazol/uso terapéutico , Pulmón/diagnóstico por imagen , Enfermedades Pulmonares Fúngicas/diagnóstico por imagen , Masculino , Neutropenia/inducido químicamente , Infecciones Oportunistas/diagnóstico por imagen , RadiografíaRESUMEN
The present study investigated the use of a compliance-training procedure and its effect on untreated deviant child behaviors. Three children, each generally noncompliant to adult requests and with several additional problems, such as crying, aggression, and self-injurious behavior, were trained in the compliance procedure under a multiple-baseline design across therapists. Compliance was defined as the correct response to prespecified requests. Other classes of deviant child behavior were measured continuously throughout the study but not directly reinforced. The results of the study showed that (a) increases in compliance to requests were directly related to the contingencies employed; (b) decreases in untreated deviant behaviors occurred when compliance increased, even though no direct contingencies had been placed on these behaviors; and (c) the relationship between untreated deviant behaviors and compliance appeared to be maintained by a different set of events in each of the three children. The results are discussed in terms of behavioral covariation and generalization.