Showing papers by "Universidade Federal de Minas Gerais published in 1974"

Immunological phagocytosis: effect of drugs on phosphodiesterase activity.

Abstract: Nachweis, dass Drogen, die einen Anstieg des cAMP-Gehalts der Makrophagen durch Verhinderung der Phosphodiesterase hervorrufen, die immunologische Phagozytose verhindern. Andererseits aber wird die Phagozytose durch Drogen gefordert, welche den cAMP-Gehalt der Makrophagen herabsetzen.

Ethnic variations in the relationship between income and fertility

Abstract: The effects of husband’spotential andrelative incomes on completed fertility, as well as their effects on certain parity progression probabilities, are examined within samples of Anglos, Blacks and Mexican Americans. Relationships are estimated using data from the one-percent 1960 and 1970 U.S. Public Use Samples. The results reveal different patterns of relationship by ethnicity between the measures of income and the measures of fertility. The effects on completed fertility of the income measures are positive for Anglos and negative for Blacks, while in the case of Mexican Americans the effect ofpotential income is negative and that ofrelative income is positive. Income effects on the parity progression probabilities are similar in pattern to those from the analyses using completed fertility, although somewhat different patterns tend to appear at different birth orders, especially among Anglos.

Trypanosomatidae Isolated from Zelus leucogrammus (Perty, 1834) (Hemiptera, Reduviidae), with a Discussion on Flagellates of Insectivorous Bugs

Abstract: SYNOPSIS The insectivorous bug Zelus leucogrammus (Perty, 1834) (Hemiptera, Reduviidae) was found to harbor several species of trypanosomatids of the genera Leptomonas, Crithidia, Herpetomonas and Blastocrithidia. However, laboratory bred nymphs given sterile food were infected only by Blastocrithidia, the other flagellates appearing in their intestinal tract when they were fed on other insects. The Blastocrithidia was thought to belong to a single species and to be a parasite proper of Z. leucogrammus (and possibly other Hemiptera), producing luxuriant infections in the intestinal tract of the bugs captured in nature and spreading easily among isolated populations through cannibalism and ingestion of cysts; it was also abundant in the genital tract of gravid females but transovarian transmission was not proved. This Blastocrithidia experimentally infected Triatoma infestans and is very close to B. triatomae Cerisola, del Prado, Rohwedder and Bozzini, 1971. The other trypanosomatids, never numerous in naturally infected Z. leucogrammus, are acquired by the bug from many different insects, chiefly Diptera, on which it was seen to feed. Herpetomonas muscarum and C. luciliae, the common trypanosomatids among several muscoid Diptera, were isolated both from flies and from the bugs fed on them.

An electron microscope study of the Auerbach's plexus and determination of substance P of the colon in Hirschsprung's disease.

Abstract: The AA present a study of 3 cases of Hirschsprung's disease performed under electron microscopy and whose data seen to suggest that substance P, which is always found in larger amounts in the ganglionic portion of the colon (than in the aganglionic one), may be related with the granular vesicles of Auerbach's plexus.

Effect of the scorpion toxin on the granular vesicles in the Auerbach's plexus of the rat ileum

Abstract: The effect of purified toxin obtained from the venom of the Brazilian scorpionTityus serrulatus on the small and large granular vesicles and on the large agranular vesicles of the Auerbach's plexus of the rat was investigated. Two segments of the rat ileum were immersed in an isolated organ bath containing Jalon's solution and toxin (15μg/ml) was added to one of these baths (9 exps.). The vesicles were counted in 1300 transversely cut axons and the number of vesicles per 100μ 2 of axonal area was estimated. The toxin did not produce any change in the morphology of the vesicles, but differences in the distribution of the vesicles were found. In the treated group a decrease in the number of the granular (dense) vesicles and an increase in the number of the agranular vesicles was observed. Our findings suggest that granular vesicles contain catecholamines and substance P, and that scorpion toxin by releasing both substances, decreases the number of these vesicles.

Interregional differences in fertility in Brazil, 1950-1970.

Abstract: Trends and interregional differences in the birth rate in Brazil between 1950 and 1970 are examined. Estimates are based on data from the 1950 and 1970 censuses. Regional differences in birth measures (crude and general rates) were found to widen between 1950 and 1970 despite a decline in fertility at the national level and a narrowing of regional differences in important socioeconomicvariables like income and urbanization, The substantial interregional migration flows which occurred in Brazil between 1950 and 1970 are examined for their possible impact on differentials. The effects are mixed, but the conclusion is that migration contributed to widening differences.

Estudo imunológico da esquistossomose mansoni intestinal antes e após tratamento com aminonitrotiazol

Abstract: The amount of immunoglobulins serum and the cutaneous sensitivity to specific antigen in 19 patients with intestinal schistosomiasis were determined, as an attempt to study the incidence of delayed and imediate type of hypersensitivity. The tests were performed before and thirty, sixty and ninety days after treatment with aminonitrotiazol. The immunoglobulin levels before treatment were found to be 1,893 ± 472, 186 ± 74 and 91 ± 26 mg%, respectively for IgG, IgA and IgM; ninety days after treatment the level for IgG became normal (1,266 ± 389 mg%) and a slight increase of IgA (270 ± 89 mg%) and IgM (111 ± 31 mg%) was observed. The patients were intradermally tested with schistosomin and with anti IgE serum. The tests before treatment gave the following resulta: 1.22 ± 0.36 cm2 for schistosomin and 1.04 ± 0.25 cm2 for anti IgE. Ninety days afterwards a slight increase of the reactions was observed and the results respectively were 1.42 ± 0.65 cm2 and 1.15 ± 0.32 cm2. The studies for delayed hypersenstivity indicated that 35% of patients showed an area of induration larger than 0.5 cm2, 48 hours after the intradermal injection with schistosomin, and 71% developed positive reaction when challenged with dinitrofluorobenzene

Migração, absorção de mão-de-obra e distribuição de renda

Abstract: Argumenta-se (cf. ECLA, 1961; Tumham, 1971; Bairoch, 1973) que o desequilibrio entre a expansao industrial e o rapido crescimento da forca de trabalho urbana, por meio de crescimento natural e fluxos migratorios, os quais tem sido estimulados por perspectivas de emprego no setor industrial, nao inteiramente realizaveis, tem causado um desemprego generalizado e baixa produtividade de uma grande proporcao da populacao urbana economicamente ativa dos paises em desenvolvimento, com a consequente marginalizacao* desses grupos. Paralelamente a esta, o aumento na desigualdade da distribuicao da renda que havia se verificado em paises como o Brasil sugere que tal marginalizacao seja um efeito necessario do estilo de industrializacao.

Vinte e cinco anos de citogenética de Triatominae

Abstract: This paper deals wlth the cycle of cytogenetical researches on the Triatominae ("Kissing bugs") since 1948. It has been described the caryotypes and the problems of the multiple sex chromosomes, the existence in some species of the heteropycnosis of some autosomes and considered its significance in isolating mechanism in evolution. The chronology of the synthesis of DNA along the stages in the testicular tubes has been analyzed by autoradiography and cytometry. The significance of the differences in the number and relative sizes of the testicular tubules has been analyzed as taxonomic character. Part of these researches has been dedicated to the cytogenetic study of the male sterility of the interspecific hybrids.

Oftalmoplegia dolorosa: relato de três casos

Abstract: Three cases of cranial polineuropathy similar to those published by Hunt and col.3 under the name of "Painfull ophtalmoplegia" are reported. The syndrome was first described by Tolosa7 in 1954. The underlying pathology is a chronic inflammatory process which involves the dura-mater of the base of the skull, specially at the cavernous sinus. The three cases here reported were seen over a period of only 4 months, suggesting that this syndrome is more prevalent in Brazil than one might think. The prognosis as to recovery, is good but recurrences are frequent. The differencial diagnosis is discussed.

Control of Schistosomiasis (Bilharziasis) in Brazil, Past, Present and Future

Abstract: Schistosoma mansoni was first recorded in Brazil in 1908, currently official estimates are that schistosomiasis is endemic in 1,000 municipalities and possibly ten million individuals are infected. Infection foci are rural communities and irrigated areas without sewage disposal facilities. In the past The Servicio Especial de Saude Publica: The Servico Nacional de Malaria and later the Department of Rural Endemic Diseases (DNERu) attempted with some success to control the intermediate hosts, Biomphalarla spp., and improve sanitation and water supplies. Following examination of past policies DNERu in 1965 authorised the organisation of pilot projects for the control of schistosomiasis in 4 states: Pernambuco, Bahia, Minas Gerais, and Gaunabara. In 1970 the results of the pilot projects were evaluated and recommendations made regarding drug treatment and snail control for immediate use by the Superintendencia de Campanhas of the Federal Ministry of Health, involving the use of the drug Hycanthone, ...