A alelopatia pode oferecer novas substâncias químicas com propriedades herbicidas menos prejudiciais ao ambiente e ao homem do que os sintéticos em uso na atual agricultura. Nesse contexto, foi avaliado o efeito de extratos de Annona crassiflora sobre a germinação e o desenvolvimento de Brachiaria brizantha, Euphorbia heterophylla e Ipomoea grandifolia, bem como o efeito do extrato mais promissor sobre a soja (Glycine max). Para isso, foram preparados extratos hidroalcoólicos de sementes, folhas e caules de A. crassiflora, a fim de serem avaliados em testes de germinação e desenvolvimento das plantas daninhas. O extrato da parte mais promissora da planta foi fracionado, utilizando-se solventes em ordem crescente de polaridade. Em relação às partes da planta de A. crassiflora avaliadas, o extrato hidroalcoólico preparado a partir das sementes proporcionou maior interferência nas plantas daninhas; a germinação das sementes de Brachiaria brizantha e Euphorbia heterophylla foi totalmente inibida por esse extrato. De modo geral, as espécies receptoras foram mais sensíveis à fração acetato de etila, mas esta não influenciou o desenvolvimento da soja. Portanto, A. crassiflora apresenta potencial para o manejo de B. brizantha, E. heterophylla e I. grandifolia, em pós-emergência na cultura da soja.

Allelopathy can offer new substances with herbicidal properties less harmful to the environment and humans than the synthetic compounds traditionally used in agriculture. The aim of this work was to evaluate the effect of extracts of Annona crassiflora on germination and growth of Brachiaria brizantha, Euphorbia heterophylla and Ipomoea grandifolia, as well as to determine the effect of the most promising extract fraction on soybean (Glycine max). Thus, hydroalcoholic extracts from seeds, leaves and stems of A. crassiflora were prepared and evaluated in germination tests as well as root and hypocotyl development of the weeds. The extract of the most promising part of the plant was fractioned using solvents with increasing polarity order. The hydroalcoholic extract, prepared from A. crassiflora seeds was found to have the greatest effect on the weeds. Also, the germination of B. brizantha and E. heterophylla was completely inhibited by the extract. In general, the species were more sensitive to the ethyl acetate fraction, although this extract did not interfere in the soybean development. The results obtained allowed to conclude that A. crassiflora presents a good potential for the management of B. brizantha, E. heterophylla and I. grandifolia, in soybean post-emergence.

Entre 1-janeiro e 30-setembro-1990 foram estudados 77 pacientes com diagnóstico de leptospirose, admitidos no SDIP/UFPE. O exame neurológico foi anormal em 70 (90,91%) dos pacientes. O exame do LCR, realizado em 67 (87%) dos pacientes, foi anormal em 64 (95,52), tendo como achado mais freqüente a pleocitose. Não houve diferença significativa no comportamento do LCR nas diversas formas clínicas neurológicas observadas, nem quando comparadas as formas ictéricas com as não ictéricas. Bastante significativos foram os resultados da reação de microaglutinação para leptospirose no LCR.

From January 1st up to September 30th 1990, 77 patients with leptospirosis diagnosis confirmed by laboratory studies were admitted at the Infectious and Parasitic Disease Service of the Hospital das Clínicas of the Universidade Federal de Pernambuco. The neurological exam was abnormal in 70 of the patients (90.91%). The cerebrospinal fluid (CSF) examination was carried out on 67 (87%) of the patients; it was abnormal in 64 (95.52%) yielding hypercytosis in the majority of cases. There was no difference in the CSF behavior in report to the several neurological forms nor in relation to the icteric or non-icteric forms of the disease. Significant were the results for the microscopic agglutination tests for leptospirosis in the CSF.

Entre 1-janeiro e 30-setembro-1990 foram estudados 77 pacientes com diagnóstico de leptospirose: 64 (83,11%) eram do sexo masculino e a média de idade, 28 anos. Os sorovars icterohemorrhagiae e canicola foram os mais frequentes. O exame do LCR, realizado em 67 (87,0%) dos pacientes, foi anormal em 64 (95,52%). A reação de microaglutinação para leptospirose com antígenos vivos foi realizada no LCR, bem como reações imunológicas para sífilis, cisticercose e esquistossomose para diagnóstico diferencial. Bastante significativos foram os resultados da reação de microaglutinação para leptospirose no LCR, pela semelhança das respostas àquelas encontradas no sangue quanto à identificação do sorovar.

From January 1st up to September 30th 1990, 77 patients with leptospirosis were admitted at the Infectious and Parasitic Diseases Service of the Hospital das Clínicas of the Universidade Federal de Pernambuco. The majority (64) were male patients, and average age was 28 years old. Sorovars icterohaemorrhagie and canicola were the most frequent. CSF examination was performed in 67 (87,0%) patients and it was abnormal in 64 (95,52%). Micro-agglutination test for leptospirosis with live antigens was performed in CSF, as well as immunological tests for syphilis, cysticercosis and schistosomiasis for differential diagnosis. Concerning the sorovar identification, results of microagglutination test for leptospirosis in CSF were significant considering the similitude of responses when compared to those found for blood samples.

Entre 1-janeiro e 30-setembro-1990 foram estudados 77 pacientes com diagnóstico de leptospirose confirmada laboratorialmente. Apresentaram início súbito dos sintomas 69 (89,61%) pacientes, com febre, cefaléia, calafrios e mialgias. Observou-se envolvimento plurissistêmico quer nos pacientes ictéricos, quer nos anictéricos. O exame neurológico foi anormal em 70 (90,91%) pacientes, com achados variáveis e que, embora de caráter transitório, permitiram caracterizar as formas clínicas seguintes: meningoencefalite e polineurite associadas, meningoencefalite, polineurite e hemorragia subaracnóidea.

From January 1st up to September 30th 1990, 77 patients with leptospirosis confirmed by laboratory studies were admitted at the Infectious and Parasitic Diseases Service of the Hospital das Clínicas of the Universidade Federal de Pernambuco. Clinical manifestations had sudden onset with presence of fever, headache, chills and muscle pains. Plurisystemic involvement was observed both in the icteric and in the non-icteric patients. The neurological exam was abnormal in 70 of the patients (90,91%). Neurological findings were essentially variable. Though in a transitory form, they allowed the observation of the following clinical forms: meningoencephalitis and polyneuritis in association, meningoencephalitis, polyneuritis, and subarachnoid hemorrhage.