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As in some studies the opinion that "the host is a biotope for the parasite, mediating its interactions with the environment" is a frequent occurrence, this paper is an attempt to point out the origin of this error and to present the theoretical basis for the accurate approach to these notions, namely parasite and host.

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OBJECTIVES: The study of incidence, clinical manifestation and treatment of acute diarrhea with mixed etiology. MATERIAL AND METHOD: Study of 48 patients with acute diarrhea with mixed etiology admitted in the Hospital of Infectious Diseases of Iasi during 1995-1998. RESULTS: 12 cases (24%) were mixed bacterial infections with the following microorganisms associations: Salmonella + Shigella (10 cazuri); Salmonella + Yersinia enterocolitica (1 case); Salmonella + Rotavirus (1 case). 16 cases (44%) had mixed digestive infections with parasites, in double or triple associations: Giardia intestinalis + Ascaris lumbricoides (10 cases); Giardia intestinalis + Ascaris lumbricoides + Entamoeba coli (1 case); Giardia intestinalis + Enterobius vermicularis (3 cases); Ascaris lumbricoides + Trichiuris trichiura (2 cases). The rest of 20 cases presented mixed infections with bacteria and parasites: Salmonella + Rotavirus + Giardia (2 cases), Salmonella + Shigella + Giardia intestinalis or Ascaris lumbricoides (6 cases), Salmonella + Giardia intestinalis (8 cases); Salmonella + Entamoeba coli (3 cases); Shigella + Trichiura trichiuris + Entamoeba coli (1 case). The majority was male patients from rural areas with age between 5 month and 56 years, the majority being children, 4 cases were found in immunosupressed patients. The clinical symptomatology was dominated by diarrheal syndrome (100%) and the diagnosis was established by clinical characters and confirmed by coproculture and parasitologic exam. The ethiological therapy was guided by antibiogram, in the majority of cases we used fluorochinolones (associated with ceftriaxone in severe cases), together with antiparasitic medications. CONCLUSIONS: In this study predominated the bacterial and parasitic infections, most frequently being isolated Salmonella, Shigella and Giardia intestinalis; the therapy associated fluorochinolones with antiparasitic medication.

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A comparative study was carried out to identify the prevalence of anemia, nutritional indices and intestinal parasitic infestation in primary school children. The target population included 209 pupils aged 6-11 years, attending schools in two areas, Rimal area (urban) and Jabalia village (rural), in Gaza Governorates. Prevalence of intestinal parasites was high in Jabalia village (more than 53%) in comparison to Rimal area (33%). The main intestinal parasites were Entamoeba histolytica, Giardia intestinalis and Ascaris lumbricoides. Polyparasitism frequency is higher especially in rural area. In both areas anemia showed a high prevalence in children due to malnutrition and intestinal parasitic diseases. There was no association between intestinal parasitic infestation and children growth, but there was association between anemia and intestinal parasitic infestation in children, particularly in rural area. The correlation between anemia and mixed infestation reaches a highly significant level.

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OBJECTIVE: Clinical, bacteriological and therapeutically study on iatrogenic staphylococcal meningitis. METHOD: Retrospective analysis of 33 cases of iatrogenic staphylococcal meningitis admitted to the Hospital of Infectious Diseases of Iasi in the interval 1988-1997. RESULTS: In the interval under study the recorded incidence was 1-5 cases per year. The predisposing factors were neurosurgical procedures for endocranial processes (12 cases), operated chronic otomastoiditis (11 cases), ventriculoatrial or peritoneal shunt (5 cases) and neurosurgical assessment (5 cases). The onset was slow, with persisting and mild headache persistence recurrence of fever, vomiting and convulsions followed by meningeal contracture and encephalitic phenomena. In 24 patients cerebrospinal fluid was typical for purulent meningitis. The causal agents were isolated in 25 cases being Staphylococcus aureus (20 cases) and Staphylococcus epidermidis sensitive to usual antistaphylococcal agents. Three therapeutically schemes were used the association cefotaxim î gentamycin proving to be the most effective vancomycin was required in but 2 cases. Three deaths were recorded. CONCLUSIONS: The symptoms of iatrogenic staphylococcal meningitis are mild marked by the underlying disease the most effective treatment being the association of cefotaxim with an aminoglycoside.

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Between 01.01.1997-31.12.1997 in the Infections Diseases Clinical Hospital of Iasi were admitted 492 patients suffering from measles. The above mentioned number of patients represents 4.92% of all the patients (10097) who were admitted during this period of time. More than half of the patients (56.9%) are residents in suburban arias. Teen-agers and young adults (15-24 years) were involved in most of the cases, followed by new born babies (0-11 months). The clinical signs were prevalent minor and the atypical exanthema was found in 1/4 of all cases. The most frequent complications were pneumonia, bronchopneumonia and otitis media. Of all the patients, two children (average age 1-4 years) died.

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A study of astrocytomas occurring in children (mean age 9.13 years) is reported. Two hundred sixty-one cases operated within 10 years (1986-1995) were reviewed. The subtentorial localization was preponderant and was seen in 145 cases (55.04%). The pathological results for supratentorial astrocytomas show an important number of high-grade, malignant astrocytomas--74 cases (64.3%). Surgery was the most important aspect of the treatment. The microscopic tumoral removal was total in 201 cases (77%), subtotal in 37 cases (14.2%); bioptic sampling was done in only 23 cases (8.8%). In grade III and IV astrocytomas, radiotherapy (high-voltage) and chemotherapy were routinely used. The patients were followed-up, both clinically and by CT, between 6 months and 10 years. Neurological evaluation (6 months post-operative) shows a preponderance of minimal sequelae (71%). Clinical signs of recurrences occurred in 56 cases (21.45%). In 37 cases (66.07%), a surgical indication was retained. Cumulative probability of survival of children with intracranial astrocytomas at 1 year was 0.714 and at 5 years was 0.655.

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This is a comparative study concerning diagnosis in unilateral exophthalmos. It was carried out in 40 patients admitted to the Neurosurgery Clinic of the "Gh. Marinescu" Hospital in Bucharest during 1986-1987. The patients were submitted to CT scan and other radiologic examinations with and without contrast media in order to improve reference to the neuroradiologic laboratory and increase the accuracy of the etiopathogenic diagnosis.

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