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Mitogenic responsiveness of intestinal intraepithelial lymphocytes (i-IEL) to concanavalin A (Con A), phytohemagglutinin P (PHA-P), and lipopolysaccharide (LPS) from Salmonella typhimurium were evaluated in various age groups of turkeys by a colorimetric blastogenic microassay. Comparisons were made...
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Newcastle disease virus (NDV) and avian pneumovirus (APV) cause Newcastle disease and rhinotracheitis respectively, in turkeys. Both of these viruses infect the respiratory system. A one-tube, multiplex, reverse transcription-polymerase chain reaction (RT-PCR) assay for the detection of both NDV and...
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Five continuous cell lines, swine testicular (ST), human rectal tumour (HRT 18), fetal rhesus monkey kidney (MA104), bovine turbinate (BT), and quail tracheal (QT35), were evaluated and compared with chick embryo fibroblasts (CEFs) for their ability to propagate B1 or Texas GB strains of Newcastle d...
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A reverse transcription-polymerase chain reaction assay was developed to detect of avian pneumovirus (Colorado strain) (APV-Col). The specific primers were designed from the published sequence of the matrix protein gene of APV-Col. The primers amplified a product of 631 nucleotides from APV-Col. The...
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Cyclophosphamide (CY) was injected in ovo on the 16th, 17th and 18th days of incubation. Blood samples were collected periodically from CY-treated and non-treated birds after hatch and were used to measure blood lymphocyte responses to the T-cell and B-cell mitogens, concanavalin A and lipopolysacch...
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A colorimetric assay employing MTT (3-[4,5-dimethylthiazole-2-yl], 2-5-diphenyltetrazolium bromide) was used to determine the mitogenic response of intestinal intraepithelial lymphocytes (i-IELs) of chickens to T- and B-cell mitogens. Comparisons between mitogenic responses of i-IELs and peripheral ...
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Stunting syndrome is an enteric disease of turkeys causing diarrhea, reduced weight gain, poor feed efficiency, and maldigestion. The etiologic agent is a newly identified, but unclassified, virus termed the stunting syndrome agent (SSA). The SSA is a pleomorphic, enveloped virus ranging from 60 to ...
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An enteric disease of young turkeys, referred to as stunting syndrome (SS), causes reduced growth and impaired feed efficiency. A recently isolated virus, stunting syndrome agent, (SSA) has been found to be the etiologic agent of SS. The objective of the present study was to determine relatedness of...
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CmeABC, a multidrug efflux system in Campylobacter jejuni, plays an important role in the resistance to different antimicrobials and toxic compounds. Although this efflux system has been well characterized in C. jejuni and to a less extent in C. coli, it is unknown if CmeABC homologs are functional ...
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Conventional nested and TaqMan reverse transcription-polymerase chain reaction (RT-PCR) assays for the detection of avian pneumovirus (APV) were evaluated and compared with virus isolation (VI) for sensitivity and specificity. Respiratory tissues and tracheal swabs were collected from experimentally...
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2, 21-day experiments were conducted to document the effects of early immunologic stress and changes in dietary MEn on selected characteristics of immune function of newly-hatched turkeys. Each experiment consisted of 8 treatments in a complete factorial arrangements of 2 injections and 4 isonitroge...
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