Improvement of the Mass-Rearing Protocols for the South American Fruit Fly for Application of the Sterile Insect Technique.

The existing rearing protocols for Anastrepha fraterculus must be reviewed to make economically viable the production of sterile flies for their area-wide application. Additionally, evidence of sexual incompatibility between a long-term mass-reared Brazilian strain and wild populations has been found. To address these issues, this study aimed to refine rearing protocols and to assess the suitability of an A. fraterculus strain for the mass production of sterile flies. A series of bioassays were carried out to evaluate incubation times for eggs in a bubbling bath and to assess the temporal variation of egg production from ovipositing cages at different adult densities. A novel larval diet containing carrageenan was also evaluated. Egg incubation times higher than 48 h in water at 25 °C showed reduced larval and pupal yields. Based on egg production and hatchability, the density of 0.3 flies/cm2 can be recommended for adult cages. The diet with carrageenan was suitable for mass production at egg-seeding densities between 1.0 and 1.5 mL of eggs/kg of diet, providing higher insect yields than a corn-based diet from Embrapa. Even after two years of being reared under the new rearing protocols, no sexual isolation was found between the bisexual strain and wild flies.

Optimization of the sterilizing doses and overflooding ratios for the South American fruit fly.

The Sterile Insect Technique (SIT) is an autocidal control method that relies on inundative releases of sterilized mass-reared insects. This technology has been used in several area-wide programmes for the suppression/eradication of fruit fly populations. Choosing the optimum sterilizing dose and the sterile release density is an essential step of the SIT. Considering unsolved issues related to the application of this technique against Anastrepha fraterculus (Wiedemann), this study aimed to define accurately the central target dose for both sexes of this species and to verify the induction of sterility in fertile flies at different sterile:fertile ratios. The results from the regression analyses proved that the sterilization process for the A. fraterculus Brazilian-1 morphotype (the most common in southern Brazil and Argentina) could consist of irradiating pupae 72 h before adult emergence at 40 Gy, with no detrimental effects to standard quality control parameters. The ovarian development in irradiated females was characterized, demonstrating that doses equal to or higher than 25 Gy cause complete and irreversible ovarian atrophy. The laboratory and field cage tests showed that the sterility induction increased with the proportion of sterile flies, and a sterile:fertile ratio of 50:1 should be appropriate in SIT field trials. The sterile females apparently did not distract the sterile males, despite of the slightly higher reductions in pupal yield for all ratios in their absence. The data generated in this study have a great practical value and will help decision-makers in planning field trials to evaluate the efficacy of the SIT against A. fraterculus populations.

Can stable isotope markers be used to distinguish wild and mass-reared Anastrepha fraterculus flies?

The availability of accurate techniques to discriminate between marked laboratory-reared flies and unmarked wild flies captured in monitoring traps is essential for programs that integrate the Sterile Insect Technique (SIT) to manage fruit flies. In this study, the feasibility of using a stable isotope marking technique for the South American fruit fly, Anastrepha fraterculus (Wiedemann), was assessed. Wild flies were collected from apple orchards, which are a target of a SIT project in southern Brazil. To verify if adult flies could be labelled by the stable isotopes from larval diets, larvae were reared on two different C4-based diets and fruits in laboratory. To evaluate the influence of the two most common attractants applied to capture A. fraterculus (grape juice and CeraTrapTM) and the most common preservation method in fruit fly collections (ethanol), laboratory-reared flies were immersed in McPhail traps containing the respective treatments for two periods of time. Samples were analyzed in an elemental analyzer coupled to a Continuous Flow Isotope Ratio Mass Spectrometer (CF-IRMS) at CENA/USP. The δ13C signatures of flies reared on artificial diets differed significantly from the δ13C of flies whose larvae were reared on fruits and from wild flies. In contrast, the δ15N values were less conclusive and the technique could not rely solely on them. In all cases considered, the δ13C and δ15N signatures from males did not differ from females. Despite the alterations caused by the attractants tested and ethanol, laboratory-flies could be distinguished from the wild ones based on δ13C signatures. This is the first comprehensive study to demonstrate that it is possible to distinguish wild A. fraterculus from flies reared on larval diets containing C4 sugar. The first experimentally derived trophic discrimination factors were also obtained for this species. Thus, intrinsic isotope labelling can serve as a backup to conventional dye marking.

Microbial-based evaluation of foaming events in full-scale wastewater treatment plants by microscopy survey and quantitative image analysis.

Activated sludge systems are prone to be affected by foaming occurrences causing the sludge to rise in the reactor and affecting the wastewater treatment plant (WWTP) performance. Nonetheless, there is currently a knowledge gap hindering the development of foaming events prediction tools that may be fulfilled by the quantitative monitoring of AS systems biota and sludge characteristics. As such, the present study focuses on the assessment of foaming events in full-scale WWTPs, by quantitative protozoa, metazoa, filamentous bacteria, and sludge characteristics analysis, further used to enlighten the inner relationships between these parameters. In the current study, a conventional activated sludge system (CAS) and an oxidation ditch (OD) were surveyed throughout a period of 2 and 3 months, respectively, regarding their biota and sludge characteristics. The biota community was monitored by microscopic observation, and a new filamentous bacteria index was developed to quantify their occurrence. Sludge characteristics (aggregated and filamentous biomass contents and aggregate size) were determined by quantitative image analysis (QIA). The obtained data was then processed by principal components analysis (PCA), cross-correlation analysis, and decision trees to assess the foaming occurrences, and enlighten the inner relationships. It was found that such events were best assessed by the combined use of the relative abundance of testate amoeba and nocardioform filamentous index, presenting a 92.9 % success rate for overall foaming events, and 87.5 and 100 %, respectively, for persistent and mild events.

New protein sources in adults diet for mass-rearing of Anastrepha fraterculus (Diptera:Tephritidae)

The aim of this study was to find alternatives to reduce the cost of mass production of the South American fruit fly (A. fraterculus) by looking for locally available products as protein source in the diet of adults to replace the imported product without changing the quality parameters. Two yeast from a Brazilian company were evaluated. The quality parameters showed that the imported hydrolyzed yeast used in the adult diet could be perfectly replaced by the local products tested, with a reduction of over 80% of the cost of the diet. The quality of the produced insects remained the same and there were improvements in some quality parameters such as the volume of eggs produced, number of adults flying and longevity under the stress.

Comorbidities of mental and behavioral disorders in chemically dependent patients in different periods of abstinence / Comorbidades de transtorno mental e comportamental em pacientes dependentes químicos em diferentes períodos de abstinência

OBJECTIVE: To assess the frequency of comorbidities of mental and behavioral disorders (CMBD) in psychoactive substance (PAS)-dependent patients with different periods of abstinence cared for at Alcohol and Other Drug Psychosocial Care Centers (CAPS-ad). METHOD: All patients under treatment in the two CAPS-ad of the city of Uberlândia-MG, between April and September 2010, were consecutively assessed. The ICD-10 symptom checklist was used to diagnose CMBD; additional information was obtained from interviews and medical records. The patients were divided according to duration of abstinence: < 1 week (Group 1); 1-4 weeks (Group 2); and > 4 weeks (Group 3). RESULTS: Of all patients assessed, 62.8% were diagnosed with CMBD, which were more frequent (p < 0.05) in Group 1 (72%) than Group 3 (54.2%), and both groups were similar to Group 2 (61%). Depressive and anxiety disorders were more frequent among patients of Group 1. Mood disorders were more frequent (p < 0.05) in women [22/34 (65%) vs. 54/154 (35.1%)], whereas psychotic disorders were more frequent (p = 0.05) in men [16/154 (10.4%) vs. 0]. The presence of CMBD was associated with more severe clinical conditions. CONCLUSIONS: The higher frequency of diagnosis of CMBD in patients of Group 1 may have resulted from the difficulties in distinguishing mental disorders that are due to PAS intoxication or withdrawal from those that are not. However, to make the diagnosis of CMBD, even during detoxification, can increase the likelihood of better response to treatment.

OBJETIVO: Avaliar a frequência de comorbidades de transtorno mental e comportamental (CTMC) em pacientes dependentes de substâncias psicoativas (SPA) em Centros de Atenção Psicossocial de Álcool e outras Drogas (CAPS-ad), com diferentes períodos de abstinência. MÉTODO: Avaliaram-se, consecutivamente, todos os pacientes que estavam em tratamento nos dois CAPS-ad de Uberlândia-MG, entre abril e setembro de 2010. Para o diagnóstico de CTMC, utilizou-se o Checklist de sintomas da CID-10; informações adicionais foram obtidas em entrevistas e em prontuários. Os pacientes foram divididos de acordo com o tempo de abstinência: < 1 semana (Grupo 1), 1-4 semanas (Grupo 2) e > 4 semanas (Grupo 3). RESULTADOS: Dentre todos, 62,8% tiveram diagnóstico de CTMC, que foi mais frequente (p < 0,05) no Grupo 1 (72%) do que no Grupo 3 (54,2%); ambos os grupos foram semelhantes ao Grupo 2 (61%). Transtornos depressivos e de ansiedade foram mais frequentes entre pacientes do Grupo 1. Transtornos de humor foram mais frequentes (p < 0,05) em mulheres [22/34 (65%) vs. 54/154 (35,1%)], enquanto transtornos psicóticos foram mais frequentes (p = 0,05) em homens [16/154 (10,4%) vs. 0]. CTMC associou-se a piores condições clínicas. CONCLUSÕES: Maior frequência de diagnóstico de CTMC entre pacientes do Grupo 1 pode ser decorrente das dificuldades de se diferenciar transtornos mentais que são decorrentes ou independentes da intoxicação ou suspensão da SPA. Porém, fazer o diagnóstico de CTMC, mesmo durante a desintoxicação, pode aumentar as chances de resposta ao tratamento.

Considerações sobre o erro no barroco / Remarks on the Baroque conception of error

Desterros. O barroco é arte de crise. Ganha terreno variando, se bifurcando, criando fronteiras para habitá-las e ir além. Pela convocação dos sentidos, com a criação de formas hiperbólicas que tenham a amplitude de expressar proposições paradoxais. A repetição, o excesso, a proliferação mobilizam para travessias antes impensadas. Eternidade e finitude estão em jogo e, para sua execução, corpo e alma vêm à cena em infinitos movimentos de dobras, desdobras, redobras(AU)

Exiles.The baroque one is crisis art. It gains land varying, branching off, creating, borders to inhabit them and to go beyond. For the invocation of senses, with the creation of hyperbolic forms that have the amplitude to express paradoxical proposals. The repetition, the excess, the proliferation mobilize for before in thinkable passages. Eternity and finitude are in game and, for its execution, body and soul come to the scene in infinite movements of folds, unfolds, refolds(AU)

Specific interaction of lectins with liposomes and monolayers bearing neoglycolipids.

The interaction of three lectins (wheat germ, Ulex europaeus I, and Lotus tetragonolobus agglutinins: WGA, UEA-I and LTA) with either N-acetyl-D-glucosamine or L-fucose neoglycolipids incorporated into phospholipid monolayers and liposome bilayers was studied at the air/water interface and in bulk solution. The results show that for both systems studied, synthesized neoglycolipids were capable of binding their specific lectin and that, in general, the binding of lectins increased with the increase in the molar fraction of the saccharide derivative incorporated in either the monolayers or bilayers. However, whereas for UEA-I, molecular recognition was enhanced by a strong hydrophobic interaction, for WGA and LTA successful recognition was predominantly related to the distance between neighboring sugar groups. The observed lengthy adsorption times of these lectins onto their specific ligands were attributed to interfacial conformational changes occurring in the proteins upon their adsorption at the interfaces.

Experimental arthritis induced by bristles from a "Lepidoptera", "Premolis Semirufa": estudo hispatológico em ratos

Pararamose é uma doença ocupacional dos seringueiros da regiao Amazônica, de natureza inflamatória, causada pela penetraçao acidental de cerdas da "pararama", nome vulgar da lagarta do lepidóptero Premolis semirufa, durante a coleta do látex. As cerdas ocorrem tanto na superfície da lagarta quanto de seu casulo; contato manual repetido com as mesmas pode causar processo crônico articular. Este estudo teve por objetivo investigar a evoluçao da artropatia causada pelas cerdas usando o rato como modelo experimental. O processo inflamatório foi induzido por injeçao de suspensao salina de cerdas no dorso ou na pata de ratos submetidos ou nao a contato com a suspensao. Os aspectos histopatológicos observados sugerem a participaçao de mecanismos de hipersensibilidade na manutençao do processo inflamatório

"Pararamose": an occupational arthritis caused by lepidoptera (Premolis semirufa): an epidemiological study

The frequency of "pararama" occupational accidents between 1988 and 1990 as well as some associated clinical manifestations are herein reported. Data were collected at an industrial rubber tree plantation, in the northern part of Brazil and compared with data similarly collected from 1971 to 1974 on the same plantation, before starting protective measures. "Pararama" is the popular name of the larval form of a native insect of the Amazonian region, Premolis semirufa. During the study period, the annual average of latex extractors was 337 and 60 accidents caused by "pararama" were registered. The annual average number of accidentes per worker from 1971 to 1974 was 0.117 and in the period of this study, 0.063(p=0.061). Nineteen injured subjects were clinically evaluated and 13 of them were symptomic. There was a statistically significant association between multiple accidents and the presence of symptoms (p=0.001). "Pararamose", an occupational arthropathy, which may evolve with functional impairment of the affected joint, can be prevented with the latex extractors education and the institution of prophylactic measures, such as the use of gloves, boots and protective glasses

Masoquismo erógeno: uma possível ligação para a pulsão de morte

A autora, considerando a pulsão em seu caráter de agente de ataque interno, propõe considerar o masoquismo erógeno como ligação possível para o aspecto mortífero de Tânatos. É apenas a partir de intrincação pulsional que permanecem abertas tanto como a via do desejo quanto a da existência do sujeito(AU)

Aids: Vida e morte em nossas vidas

Os dados sobre a programacao da AIDS vem expressar conflitos psiquicos e sociais que ha muito tempo nossa civilizacao tem precisado escamotear.