During the period from July 2002 to June 2003, infectious bursal disease (IBD) was suspected in 101 commercial flocks of broiler chickens on the basis of clinical and post mortem findings in some districts of the Haryana state, India. Bursal samples were collected randomly from 20 flocks for the detection of infectious bursal disease virus (IBDV) by reverse transcriptionpolymerase chain reactio...

background: influenza a viruses bearing all known ha and na subtypes have been isolated from avian hosts: but only the a/h1n1,a/h2n2 and a/h3n2 influenza subtypes have been associated with widespread epidemics in humans un­til now .while influenza b detected only in humans. subtype h5 infection in humans occurred for the first time dur­ing 1997-1998 in hong kong, then china in 2003, vietnam and...

Three multiplex hemi-nested RT-PCR assays were developed to detect simultaneously 12 RNA respiratory viruses: influenza viruses A, B and C, human respiratory syncytial virus (hRSV), human metapneumovirus (hMPV), parainfluenza virus types 1-4 (PIV-1, -2, -3 and -4), human coronavirus OC43 and 229E (HCoV) and rhinovirus (hRV). An internal amplification control was included in one of the RT-PCR as...

There are high levels of co-incidence of porcine reproductive and respiratory syndrome virus (PRRSV) and porcine circovirus type 2 (PCV2) in porcine tissue. This study established a duplex nested reverse transcriptase polymerase chain reaction (RT-PCR) method that targets the genomic RNA of type 2 PRRSV and the mRNA of PCV2 in infected tissues. The method amplified discriminative bands of 347 b...

A rapid identification of dengue viruses from clinical samples by using a nested reverse transcriptase-polymerase chain reaction (RT-PCR) procedure was carried out for diagnostic and epidemiological purposes. RT-PCR identified DEN-1 and DEN-2 viruses in 41% (41/100) of previously confirmed cases and provided an accurate confirmation of DHF in four fatal cases. RT-PCR was also useful for detecti...

We developed a sensitive and rapid real-time reverse transcription-polymerase chain reaction (RT-PCR) assay to detect influenza A H5N1 virus in clinical samples. This assay was evaluated with samples from H5N1-infected patients and demonstrated greater sensitivity and faster turnaround time than nested RT-PCR.

A TaqMan real-time RT-PCR was developed to detect and quantify RNA-targets from the non-circulative, non-persistently transmitted Plum pox virus (PPV) in individual fresh or aphids captured previously and squashed on paper. Reliable quantitation ranged from 40 up to 4 x 10(8) copies of control transcripts. This technique was applied successfully to plant material and to individual PPV vector (M...