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A Araújo

Publications and source records attributed to A Araújo.

34 records · Page 2Linked to original sources
PubMed1991

Trichuris eggs in animal coprolites dated from 30,000 years ago.

Trichuris eggs were found in Kerodon rupestris (Rodentia, Caviidae) coprolites collected in archaeological layers dated from 30,000 yr BP (before present) to 8,450 yr BP. Adult worms and eggs of this genus were not found in a search of living mammals of the region. Results indicate that K. rupestris was a host for an unknown Trichuris species not found in this rodent presently. Climate changes that occurred by 10,000 yr ago in the region could be the cause of its disappearance. The finding of parasites in archaeological material can show the antiquity of host-parasite relationships and parasite losses through time.

Animals↗
PubMed1989

[Early left ventricular dysfunction in acute myocardial infarct. Evaluation using imaging methods].

A patient admitted in a Coronary Care Unit with an acute anterior myocardial infarction, is presented. He had initially normal left ventricular function and, on the 11th day he had, suddenly, an acute pulmonary edema. The reason for this episode was detected through imaging techniques--echocardiography and isotopic studies, and consisted on infarct expansion with early evolution for apical aneurysm. Contrast angiography confirmed the presence of a huge aneurysm and two vessels disease. Tallium Scintigraphy showed reversible ischemia beyond necrotic areas. The patient was submitted to aneurysmectomy and received three aorto-coronary bypass. He is now doing well, in class I, NYHA. The discussion emphasizes the actual role of imaging techniques in the diagnosis of infarct expansion and early functional aneurysm. We discuss the prognostic of infarct expansion and the importance of perfusion studies on defining areas of myocardium in jeopardy, enabling a better surgical approach.

Echocardiography↗
PubMed1989

[Thrombolysis in acute myocardial infarct. Experience at Santa Maria's Hospital].

OBJECTIVES: To evaluate the experience with i.v. streptokinase (SK) in the treatment of acute myocardial infarction (AMI) in two cardiac care units. Conception: Retrospective analysis of patients (pts) admitted either to UCIM or UTIC-AC with the diagnosis of AMI receiving SK. PATIENTS: 77 pts were treated, although one of them was later proved to be a false positive diagnosis of AMI. Of the other 76, there were 63 men and 13 women with age 55 +/- 12 (mean age +/- SD) years (limits of 20 and 82 years). AMIs were anterior in 42% of the pts, inferior in 51%, anterior and inferior in 4% and non Q wave in 1%; Killip classes (cl) were: cl I in 64%, cl II in 26%, cl III in 5% an cl IV in 5%. The time interval from the beginning of acute symptoms to the arrival at the hospital was 2.8 +/- 1.2 hours (1 to 15) and from that moment to administration of SK was 1.6 +/- 1.4 h. The whole interval to the administration of SK was 4.4 +/- 2.5 h. RESULTS: The 3 criteria of reperfusion (pain relief, ST changes resolution and less than 18 h maximum CK rise) were present in 36% of the pts, 2 of the criteria in 21%, and 41% of the pts had only one or no criteria. The time interval to the administration of SK in these 3 groups was 3.3 +/- 1.3 h, 4.8 +/- 3.1 h and 5.0 +/- 2.5 h respectively. Non fatal complications occurred in 16% of the pts (major bleeding in 2.6%, minor bleeding in 99% and minor anafilaxy in 4%. Mortality was 11.8% (9 pts). Two thirds of the deaths were due to cardiac rupture. In hospital residual ischemia was present in 9% (7 pts). CONCLUSION: Treatment of AMI with i.v. SK proved to be a safe and easy to apply therapeutic option, carrying a low morbidity and mortality, lower than that normally observed in our hospital with the conventional approach of AMI before the era of thrombolysis.

Adult↗
PubMed1989

[Current status of the pharmacologic treatment of heart insufficiency. Role of diuretics].

The pharmacologic properties of diuretics were reviewed with a special emphasis on their action at the renal tubule level. Afterwards their role in the treatment of cardiac failure was evaluated and it was concluded that they have an indisputable place in the management of that syndrome at any stage of its evolution. Their side effects were analysed and it was stressed that on the long term the risk benefit ratio was very favorable in terms of therapy of cardiac failure. Finally the so called diuretic resistance appearing with chronic therapy is discussed.

Diuretics↗
PubMedDate not supplied

Two breeding females within free-living groups may not always indicate polygyny: alternative subordinate female strategies in common marmosets (Callithrix jacchus).

The mating system of callitrichids has been reported to be monogamous, polygynous and polyandrous. In Callithrix jacchus, groups with 2 breeding females and groups with 1 breeding female have been reported. Our purpose was to evaluate the occurrence of occasional reproduction by subordinate females in free-ranging C. jacchus groups characterized as monogamous. Four groups were monitored at a field site of IBAMA-Brazil for between 20 and 72 months. We recorded the birth of 7 sets of twins to subordinate females that had never reproduced before. Sexual activities were recorded opportunistically: dominant females copulated with only the resident male, while subordinates copulated with extra-group males. We suggest these were essentially monogamous groups that occasionally had 2 reproductive females. Between-group copulations seem to be an alternative strategy used by the subordinates. Despite the costs, there would probably be benefits as a result of scanning for vacancies for reproductive positions in neighbouring groups and the establishment of ties with extra-group males that might become a reproductive partner in the future.

Animals↗
PubMedDate not supplied

Paleoparasitology: perspectives with new techniques.

Paleoparasitology is the study of parasites found in archaeological material. The development of this field of research began with histological identification of helminth eggs in mummy tissues, analysis of coprolites, and recently through molecular biology. An approach to the history of paleoparasitology is reviewed in this paper, with special reference to the studies of ancient DNA identified in archaeological material.

Animals↗
PubMedDate not supplied

Acanthocefalan eggs in animal coprolites from archaeological sites from Brazil.

An important point in paleoparasitology is the correct diagnosis of the origin of coprolites found in archaeological sites. The identification of human and animal coprolites, through the study of the shape, size, characteristics after rehydration, alimentary contents, and the presence of parasites, has proved to be accurate for human coprolites. For non-human ones we compared coprolites with recent faeces of animals collected near the archaeological sites, following the methodology above mentioned. In this paper anteaters coprolites (Tamandua tetradactyla; Myrmecophaga tridactyla) with eggs of Gigantorhynchus echinodiscus (Archiancanthocephala; Gigantorynchidae) were identified.

Acanthocephala↗