OBJETIVO: Analisar as propriedades antimicrobianas do óleo de silicone (Óleo de Silicone®, Ophthalmos, Brazil) no crescimento in vitro de diferentes microrganismos relacionados à endoftalmite. MÉTODOS: Os seguintes microrganismos foram analisados: (1) Pseudomonas aeruginosa (ATCC 27583); (2) Escherichia coli (ATCC 25922); (3) Staphylococcus aureus (ATCC 25923); (4) Staphylococcus epidermidis (ATCC 12228); (5) Candida albicans (ATCC 10231); (6) Klebsiella pneumoniae (ATCC 13883); and (7) Streptococcus pneumoniae (ATCC 49619). As placas foram incubadas à temperatura de 35 ± 2ºC e o seu crescimento examinado após 24 horas. Um disco de papel filtro neutro, sem óleo de silicone, foi posicionado no centro de cada placa como controle. RESULTADOS: Não foram encontrados halos de inibição em nenhuma das placas contendo as diferentes concentrações de inóculo bacteriano estudadas. CONCLUSÕES: O Óleo de Silicone® 1000 cps não apresenta efeito no crescimento bacteriano de nenhum dos microrganismos estudados.

PURPOSE: To analyze the antimicrobial properties of silicon oil (Óleo de Silicone®, Ophthalmos, Brazil) on in vitro bacterial growth of different microorganisms related to endophthalmitis. METHODS: The following microorganisms were analyzed: (1) Pseudomonas aeruginosa (ATCC 27583); (2) Escherichia coli (ATCC 25922); (3) Staphylococcus aureus (ATCC 25923); (4) Staphylococcus epidermidis (ATCC 12228); (5) Candida albicans (ATCC 10231); (6) Klebsiella pneumoniae (ATCC 13883); and (7) Streptococcus pneumoniae (ATCC 49619). The plates were incubated at 35 ± 2ºC and its growth examined after 24 hours. An empty disk was placed in the center of each plate as a control. RESULTS: No inhibition halos were verified in any of the plates containing the four different concentrations of the bacterial inocula. CONCLUSIONS: The silicon oil 1000 cps does not have any effect on bacterial growth of any of the studied microrganisms.

OBJECTIVES: To identify Chlamydia trachomatis via polymerase chain reaction and a direct fluorescent antibodyassay in patients with vernal keratoconjunctivitis while comparing the efficacies of both tests for detectingChlamydia trachomatis in these conditions. METHODS: Conjunctival scraping samples were obtained from 177 patients who were divided into two groups: avernal keratoconjunctivitis group (group A) and a control group (group B). The polymerase chain reaction and adirect fluorescent antibody assay were performed. Sensitivity, specificity, receiver operating characteristic curves,and areas under the curve were calculated for both tests in groups A and B. Receiver operating characteristic curveswere plotted using a categorical variable with only two possible outcomes (positive and negative). RESULTS: Statistical analysis revealed a significant association between vernal keratoconjunctivitis and Chlamydia trachomatis infection detected by a direct fluorescent antibody assay with high sensitivity and specificity. Allpatients in group A with positive polymerase chain reactions also presented with positive direct fluorescentantibody assays. CONCLUSION: The association between vernal keratoconjunctivitis and Chlamydia trachomatis infection wasconfirmed by positive direct fluorescent antibody assays in 49.4% of vernal keratoconjunctivitis patients and bypositive polymerase chain reactions in 20% of these patients. The direct fluorescent antibody assay detectedChlamydia trachomatis in a higher number of patients than did the polymerase chain reaction. Although thediagnosis of trachoma is essentially clinical, the disease may not be detected in vernal keratoconjunctivitis patients.Due to the high frequency of chlamydial infection detected in patients with vernal keratoconjunctivitis, we suggestconsidering routine laboratory tests to detect Chlamydia trachomatis in patients with severe and refractory allergicdisease.

Os autores apresentam um caso raro de dacrioadenite aguda bilateral associada à mononucleose. Paciente do sexo feminino, 27 anos, tinha aumento agudo da glândula lacrimal, bilateral, com sinais flogísticos. As alterações tomográficas e laboratoriais confirmaram o diagnóstico e o tratamento com esteróide sistêmico foi introduzido, com resolução completa dos sinais e sintomas. COMENTÁRIOS: A dacrioadenite é uma apresentação incomum da mononucleose infecciosa e pode minimizar outras manifestações desta doença. O diagnóstico de mononucleose deve ser considerado em casos de dacrioadenite aguda bilateral. Os esteróides sistêmicos contribuem para a resolução do quadro inflamatório.

The authors present a rare case of acute bilateral dacryoadenitis in association with infectious mononucleosis. A 27 year-old woman had acute bilateral lacrimal gland enlargement with inflammatory signs. The CT scan findings and laboratorial investigations confirmed the diagnosis of infectious mononucleosis. The systemic treatment with intravenous steroids was initiated leading to complete remission of the signs and symptoms. COMMENTS: Dacryoadenitis is an uncommon manifestation of infectious mononucleosis and may minimize other signs of the disease. Mononucleosis has to be considered in acute dacryoadenitis cases. Systemic steroids contribute to the fast regression of inflammatory condition.

Os autores relatam um raro caso de plasmocitoma da órbita envolvendo glândula lacrimal com transformação secundária para mieloma múltiplo em uma paciente de 42 anos. A lesão foi removida cirurgicamente e o exame anatomopatológico, aliado à imuno-histoquímica, revelou positividade para imunoglobulina G e cadeias leve tipo Kappa. Após extensa avaliação sistêmica, nenhuma anormalidade foi observada, sendo feito o diagnóstico de plasmocitoma solitário ósseo. A paciente foi submetida à radioterapia, permanecendo livre da doença por 5 anos e 6 meses até 2007, quando apresentou uma fratura patológica devido à infiltração plasmocitária na coluna lombar, sendo feito diagnóstico de mieloma múltiplo. Uma vez que o plasmocitoma solitário ósseo pode ser a primeira manifestação do mieloma múltiplo, esses pacientes necessitam de adequado diagnóstico e seguimento a longo prazo, pois o tratamento e prognóstico dessas duas condições é diferente.

The authors present a rare case of plasmacytoma of the orbit involving lacrimal gland with secondary transformation into multiple myeloma in a 42-year-old woman. The lesion was surgically removed and analyzed. Histopathological examination with immunostaining revealed it to be positive for immunoglobulin G and Kappa chains, demonstrating monoclonality. However, no abnormality was observed on serum electrophoresis, skeletal survey and bone marrow aspiration. Therefore, the tumor was diagnosed solitary plasmacytoma of bone. The patient was treated with external beam radiotherapy and has remained disease free for 5 years and 6 months until 2007, when she presented a pathological fracture due to multiple myeloma. Extensive medical work-up to rule out multiple myeloma or other malignant lymphoproliferative conditions involving orbit or ocular adnexa is needed when the diagnosis of solitary plasmacytoma of bone is suspected because treatment and prognosis are very different.

Os autores relatam o primeiro caso de tumor neuroectodérmico primitivo periférico primário da órbita apresentado na literatura nacional. Características clínicas, radiológicas e histopatológicas são discutidas. O diagnóstico foi confirmado por meio de análise imuno-histoquímica, etapa essencial no diagnóstico dos tumores de pequenas células redondas.

The authors present a case of primary peripheral primitive neuroectodermal tumor of the orbit in a 10-month-old girl, which is the first case in the Brazilian literature. Clinical, radiologic and histopathologic features are discussed. The diagnosis was confirmed by immunohistochemical analysis which is essential to the diagnosis of small round cell tumors in the orbit.