Cat scratch disease; cat scratch fever, benign lymphoreticulosis of inoculation.
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Verruga peruana is a vascular hyperplasia that is sometimes histologically mistaken for a malignant neoplasm. An infiltrative pattern with nuclear pleomorphism and mitoses is prominent in some lesions. From a series of lesions of verruga peruana, we selected five atypical lesions, two of them closely resembling epithelioid angiosarcoma. We used histologic criteria as well as morphometry and flow cytometry to further characterize the atypical features of the lesions. Histology and morphometry evidenced marked nuclear pleomorphism. Flow cytometry failed to reveal aneuploidy and disclosed about 10% of the cells to be in the S, G2 and M phase.
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A polymerase chain reaction (PCR) is described for the detection of Bartonella bacilliformis, the etiologic agent of bartonellosis, which cannot be identified biochemically. Amplification of a genomic 231 bp Bartonella DNA sequence permitted specific identification of 12 Bartonella isolates from Peruvian bartonellosis patients as well as detection of Bartonella DNA in blood samples and formaldehyde preserved skin biopsies. Specificity of amplification products was confirmed by restriction fragment analysis. No positive results were obtained with Brucella abortus, phylogenetically closely related to B. bacilliformis, and several other bacterial, fungal, and protozoal species. PCR appears as a promising technique for specific identification of B. bacilliformis in cultures and in clinical materials with further applications in taxonomic studies and in the investigation of Bartonella-like isolates obtained outside South America.
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