Dataset Information

Identification of Balamuthia mandrillaris by PCR assay using the mitochondrial 16S rRNA gene as a target.

ABSTRACT: Balamuthia mandrillaris is an opportunistic pathogen that causes granulomatous amebic meningoencephalitis in animals, including humans. Based on sequence analysis of mitochondrial small-subunit-rRNA genes, we developed primers that amplify a Balamuthia-specific PCR product. These primers will be useful for retrospective analyses of fixed tissues and possible identification of Balamuthia in vivo.

SUBMITTER: Booton GC

PROVIDER: S-EPMC149639 | biostudies-literature | 2003 Jan

REPOSITORIES: biostudies-literature

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Identification of Balamuthia mandrillaris by PCR assay using the mitochondrial 16S rRNA gene as a target.

Booton Gregory C GC Carmichael Jennifer R JR Visvesvara Govinda S GS Byers Thomas J TJ Fuerst Paul A PA

Journal of clinical microbiology 20030101 1

Balamuthia mandrillaris is an opportunistic pathogen that causes granulomatous amebic meningoencephalitis in animals, including humans. Based on sequence analysis of mitochondrial small-subunit-rRNA genes, we developed primers that amplify a Balamuthia-specific PCR product. These primers will be useful for retrospective analyses of fixed tissues and possible identification of Balamuthia in vivo. ...[more]

PMID: 12517892

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Project description:A PCR-based assay was developed for detecting DNA of granulocytic ehrlichiae in blood samples from dogs, horses, and cattle, Primers were designed from 16S rRNA sequence information to specifically amplify DNA from a newly identified Swedish Ehrlichia species. The 16S rRNA nucleotide sequence of this Swedish species differs in only two and three positions from the sequences of Ehrlichia phagocytophila and Ehrlichia equi, respectively, which were also amplified by this PCR system. For evaluation, PCR results were compared with microscopic examination of stained blood smears for the detection of granulocytes containing ehrlichiae (morulae). Thirty-four of 36 microscopically positive samples were also positive by PCR, and 6 microscopically negative samples were negative by PCR as well. Six samples, in which morulae-like structures had been seen, were negative by PCR, also at a lower annealing temperature and when a reamplification of the first PCR products was performed. The identities of the PCR products from some canine and equine isolates were verified by direct DNA sequencing and were found to be identical with the Ehrlichia sequence found in these animal species that had been obtained earlier. The sequences of a segment of approximately 600 nucleotides from two bovine isolates were identical to that of E. phagocytophila, whereas the sequence of another bovine isolate differed in two positions from that of E. phagocytophila and in three positions from the sequences of the canine and equine isolates. Serum samples were analyzed by indirect fluorescent-antibody testing. Seventy-three percent of the animals which were positive by microscopy and PCR also had positive antibody titers. However, it was not possible to rely on a single serological result for diagnosis of present infection. It was, therefore, concluded that PCR was the most reliable method, useful in the clinical laboratory for specific and early diagnosis of granulocytic ehrlichiosis in animals.

Dataset Information

Identification of Balamuthia mandrillaris by PCR assay using the mitochondrial 16S rRNA gene as a target.

Publications

Identification of Balamuthia mandrillaris by PCR assay using the mitochondrial 16S rRNA gene as a target.

Similar Datasets

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