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1996-02-27
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Document 0544
DOCN M9630544
TI Detection of microsporidia (Enterocytozoon bieneusi) in intestinal
biopsy specimens from human immunodeficiency virus-infected patients by
PCR.
DT 9603
AU Franzen C; Muller A; Hegener P; Salzberger B; Hartmann P; Fatkenheuer G;
Diehl V; Schrappe M; Department of Internal Medicine I, University of
Cologne,; Germany.
SO J Clin Microbiol. 1995 Sep;33(9):2294-6. Unique Identifier : AIDSLINE
MED/96025140
AB Intestinal microsporidiosis has been implicated as a major cause of
chronic diarrhea in human immunodeficiency virus (HIV)-infected
patients. So far diagnosis depends on direct visualization of the
parasites by light and transmission electron microscopy. We evaluated
the diagnostic value of microsporidian DNA amplification by PCR on
duodenal biopsy specimens obtained from patients with and without
intestinal microsporidiosis caused by Enterocytozoon bieneusi. Thirteen
HIV-infected patients (all CDC stage C3) were studied. Eight patients
had intestinal microsporidiosis caused by E. bieneusi (n = 6), Septata
intestinalis (n = 1), and Encephalitozoon cuniculi (n = 1);
microsporidioses were diagnosed by light microscopy of stool samples and
confirmed by light and electron microscopy of intestinal biopsy
specimens. Five patients had no microsporidia in their stool samples or
in their intestinal biopsy specimens, as examined by light and electron
microscopy. Additionally, DNA prepared from Toxoplasma gondii derived
from mouse ascites was used as a further control. A 353-bp DNA fragment
of the small-subunit rRNA gene could be amplified from all six biopsy
specimens infected with E. bieneusi, and the nature of the PCR products
was confirmed by Southern blot hybridization. No amplification of DNA
fragments was seen by using DNA extracted from biopsy specimens with S.
intestinalis or E. cuniculi infection or without microsporidian
infection and with template DNA extracted from T. gondii. The results
suggest that PCR testing of intestinal biopsy specimens may be a useful
approach to diagnosing microsporidiosis in HIV-infected patients.
DE Animal Base Sequence Human HIV Infections/COMPLICATIONS/*PARASITOLOGY
Intestines/*PARASITOLOGY Mice Microsporida/*ISOLATION & PURIF
Molecular Sequence Data Polymerase Chain Reaction Protozoan
Infections/COMPLICATIONS/*PARASITOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).