Natural infection of wild rodents by Schistosoma mansoni. Parasitological aspects.

The evaluation of the role of rodents as natural hosts of Schistosoma mansoni was studied at the Pamparrão Valley, Sumidouro, RJ, with monthly captures and examination of the animals. Twenty-three Nectomys squamipes and 9 Akodon arviculoides with a schistosomal infection rate of 56.5% and 22.

Feeding behavior of different species of Chagas' disease vectors stimulated with blood sources at different temperatures.

1. The feeding behavior of six triatomid species toward latex condoms filled with blood at 26 +/- 1 and 36 +/- 1 degrees C was observed for 4 h. 2.

Lethality of triatomines (Hemiptera: Reduviidae), vectors of Chagas' disease, feeding on blood baits containing synthetic insecticides, under laboratory conditions.

A laboratory study was conducted to test the toxicity of synthetic insecticides added to defibrinated sheep blood kept at room temperature and offered as food to the following triatomine species: Triatoma infestans, Panstrongylus megistus, Triatoma vitticeps, Triatoma pseudomaculata, Triatoma brasiliensis and Rhodnius prolixus. The insecticides used, at a concentration of 1 g/l, were: HCH, DDT, Malathion and Trichlorfon, and the lethalithy observed at the end of a 7-day period varied according to the active principle of each. HCH was the most effective by the oral route, killing 100% of the insects, except P.

[Wild rodents as experimental models of schistosomiasis mansoni: Akodon arviculoides (Rodentia: Cricetidae)].

The experimental infection of A. arviculoides through different routes of penetration of Schistosoma mansoni cercariae (Transcutaneous and subcutaneous) was studied by the kinetics of egg elimination in stools, by the recovery and localization of adult worms (in the portal system and the mesenteric veins) and through the quantitative egg count. It was shown that A.

Ascaris lumbricoides in neonate: evidence of congenital transmission of intestinal nematodes.

Clinical and epidemiological study of a forty-days-old infant with a diarrheic condition and insufficient development led to the coprological diagnosis of ascariasis and possible congenital infection. Specific treatment with levamisole, resulted in clinical and parasitological cure, in addition to gain of weight up to normal levels. Maternal parasitism had been diagnosed two months before labor and proved beyond doubt during the ensuing epidemiological inquiry.

[Rupture of the interventricular septum in acute myocardial infarct: diagnosis by Doppler color code. Clinical case].

Doppler Color Flow Mapping represents the most recent step in the evolution of Doppler techniques that display blood flow signals superimposed on real time, two dimensional echocardiographic images. The following case illustrates the utility of this technique in the diagnosis of a ventricular septal rupture complicating the course of an inferior wall acute myocardial re-infarction. An abnormal blood flow pattern from the left to right ventricle through the ventricular septum was promptly visualized.

Production of prostacyclin, 6-keto-PGF1 alpha and thromboxane B2 by human umbilical vessels increases from the placenta towards the fetus.

The aim of this study was to investigate the production of prostacyclin (PGI2) and thromboxane B2 (TXB2) by incubated samples of umbilical arteries and veins taken at different distances (2, 10, 20, 30 cm) from the placenta to provide additional information relevant to the haemodynamics of umbilical blood flow. The production of PGI2, and 6-keto-PGF1 alpha (the stable metabolite of PGI2), was higher in both veins and arteries as the distance from the placenta at which the vessels were sampled was increased. A similar correlation between production by venous rings and distance from the placenta was observed for TXB2, but there was no apparent gradient of TXB2 production by the samples of arterial rings.

Production of prostacyclin (PGI2) and thromboxane A2 (TXA2) by vessels draining and not-draining benign and malignant tumours of the breast.

The production of PGI2 (determined by bioassay) and TXB2 (determined by radioimmunoassay) was studied in the supernatant solutions obtained after incubation of vessel rings prepared from veins draining and not draining benign and malignant tumours of the breast. A significant increase (p less than 0.01) was found in the production of PGI2 by vessels draining the malignant tumours as compared to those not draining such tumours or vessels draining benign tumours.

Phosphoenol Pyruvate Carboxylase in Parasitic Plants: Further Characterization in Various Species and Localization at the Level of Cells and Tissues in Lathraea clandestina L.

Phosphoenolpyruvate carboxylase (PEP carboxylase, EC 4.1.1.

Production of prostacyclin, 6-keto-PGF1 alpha and thromboxane B2 by incubated samples of umbilical vessels: a comparison of methods for expressing the results on dry weight, wet weight, protein or DNA bases.

The production of PGI2 (determined by bioassay), and of 6-keto-PGF1 alpha and TXB2 (determined by radioimmunoassay) by samples of human umbilical vessels have been measured. The results have been calculated on four bases: dry weight, wet weight, protein and DNA. There was a higher production of PGI2 and 6-keto-PGF1 alpha by umbilical veins than by umbilical arteries; no significant difference in TXB2 production was observed between umbilical veins and arteries.

[Pericarditis with recurrent cardiac compression in rheumatoid polyarthritis].

The authors report the case of seventy-two-year-old man with severe rheumatoid arthritis in whom onset of right ventricular failure led to the discovery of pericarditis. After fluid withdrawal, the anterior part of the pericardium was resected. Analysis of the fluid and histological findings suggested a rheumatoid origin.

[Paracrystalline inclusions of nutritive cells of galls induced by Diplolepis rosae L. on Rosa canina L].

Numerous crystalline inclusions are found in the nutritive cells lining the larval cavities of the galls induced by Diplolepis rosae L. on Rosa canina L. Electron microscopic investigations show that these intracytoplasmic inclusions consist of staggered, closely parallel, and slightly wavy filaments.

[Schistosomiasis in Tunisia. Results after 10 years of the endemics control].

Despite the progress already made in the field of epidemiology and the control of schistosomiasis, the practical application of an efficient and economically acceptable methodology still remains a difficult problem to solve. In the saharian and pre-saharian regions of Tunisia, Bulinus truncatus was successfully controlled while at the same time most of the infected people were treated, so that the transmission did not show up through the appearance of new cases at the outset of the 2nd semester 1976. A system of epidemiologic supervision and yearly evaluation of the results has been implemented in order to strengthen this positive fact and to ensure the cure of residual cases.

[Intravenously disopyramide phosphate administration for treatment of arrhythmias].

Disopyramide phosphate (DF) was administered intravenously to 50 patients during 55 episodes of arrhythmias. The mean dosage employed was 2 +/- 1.4 mg/kg over a period of 3 minutes to 60 minutes (mean 16 +/- 6'), followed by an infusion at a dose of 0.

Man-made lakes and man-made diseases. Towards a policy resolution.

Throughout the tropical world, in Africa. Asia and Latin America, the construction of water impoundments, for irrigation and other purposes. in areas of endemic water-related diseases, has inexorably intensified community levels of infection, and also created new areas of transmission.

[Study on breast feeding in a suburban area].

Human milk is considered the best nourishment a child can have during his first months of life, providing that it exists in sufficient amount. In a study of the feeding characteristics in suburban areas of Mexico City, it was found that 71 mothers would continue to breast-feed their children up to the twelfth month. Supplemental feeding began during the first four months with: fruit, vegetables, eggs, meat and in final stages, soups and cereals.