invasive aspergillosis (1 is a life-threatening condition in immunocompromised patients. an early diagnosis is of great importance because early treatment may resolve this potentially fatal infection. recently, the polymerase chain reaction (pcr) has been used successfully in detecting specific dna of several pathogen. in this study, nested pcr was used to detect dna specific for a!.pergiflus s...

in this study a nested-pcr assay was optimized for detection of two bvdv biotype of nadl strain. a part of 5' non-coding region of virus, 249 bp in size, was amplified in rt-pcr. pcr product was cloned in a ptz57r/t vector and sequencing results confirmed the specificity of the test. internal primers were designed and a 155 bp dna fragment was amplified in nested-pcr. the sensitivity of rt...

The early detection of scrub typhus in Thailand by nested polymerase chain reaction (PCR) is presented. The diagnosis of scrub typhus, from clinical samples obtained from hospitals in the northern part of Thailand, by nested PCR was compared to immunofluorescence (IF) and Weil-Felix (WF) tests. The primer pairs used for the nested PCR were designed on the basis of the nucleotide sequence of the...

A modified nested polymerase chain reaction (PCR) method for detection of Plasmodium falciparum, P. vivax and P. malariae was combined with a simple blood collection and deoxyribonucleic acid (DNA) extraction method and evaluated in Malaysia. Finger-prick blood samples from 46 hospital patients and 120 individuals living in malaria endemic areas were spotted on filter papers and dried. The simp...

the nested PCr has been used to evaluate the usefulness and efficiency of different Bacillus anthracis spore isolation methods in contaminated soil samples. The best results were obtained using two methods described by Beyer et al. [1] and Cheun et al. [9]. outer and inner pairs of primers were designed from the protective antigen gene of plasmid pXo1 as well as from genes B and C of the capsul...

Respiratory tract infections can be caused by a heterogeneous group of viruses and bacteria that produce similar clinical presentations. Specific diagnosis therefore relies on laboratory investigation. This study developed and evaluated five groups of multiplex nested PCR assays that could simultaneously detect 21 different respiratory pathogens: influenza A virus (H1N1, H3N2, and H5N1); influe...

Background: This study aimed to design and analyze the applicability of an oligonucleotide probe in radioisotope 32P-based dot blot hybridization for detection of hepatitis C virus. Methods: Forty-six of plasma samples were used. The plasma was extracted to obtain viral RNA genome as template for RT-PCR and the amplicon was used for nested PCR. Twenty-four HCV genomes were retrieved from GeneBa...