Two patients, with cervical lymphadenopathies and a presumptive diagnosis of lymphoma or scrofula, were submitted to biopsies of the affected lymph nodes. Unexpectedly, the histological picture revealed a necrotic-granulomatous reaction and the presence of leishmania (amastigotes) in some vacuolated macrophages. The patients were from different endemic areas of leishmaniasis in Brazil, and had no perceptible cutaneous or mucosal lesions. Later, however, one of them developed such lesions, probably as an effect of a treatment for toxoplasmosis. These findings support the idea that the agents of the disease, once in the host organism, would invade the organs of the phagocytic-mononuclear system, there remaining for a long time, maybe for the rest of the host life. Eventually, under the action of several factors, that could modify the host resistance, the parasites migrate to the skin or the mucosal membranes, causing secondary or reactivating lesions.
This study aimed to identify microorganisms present in contaminated dental lab coats and determine the risks of microbial contamination to professionals and patients. The study included 10 dentists of the city of Foz do Iguaçu, state of Paraná, Brazil, who signed an informed consent form according to the ethics committee on human research. Microbiological samples were collected from coats using the rolling swab technique, passing a single swab moist in BHI medium in the collar, cuffs and pockets. A questionnaire with open and closed questions was used. Statistical data were tabulated and described in a descriptive analysis through the bioestatic software 5.0. Regarding coat sanitization, 80% of respondents adopted this procedure every five days of use. Diagnosed microorganisms were: Klebsiella sp., Staphylococcus saprophyticus, Enterobacter sp., Staphylococcus epidermidis, Staphylococcus aureus. Staphylococcus aureus (50%) and Staphylococcus epidermidis (40%) were the most predominant bacteria found, especially in coats analyzed at the end of the workday, which may cause diseases such as: folliculitis, furuncle, endocarditis, meningitis, osteomyelitis, arthritis, urinary tract infections and others. Based on results, it was found that the lab coats of dentists are contaminated by microorganisms considered of clinical importance, contributing to a possible spread of diseasecausing microorganisms among dentists and patients.
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