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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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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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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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Studies were performed to determine if passive immunization with hyperimmune sera generated to specific Newcastle disease virus (NDV) proteins conferred protection against virus challenge. Six groups of 3-wk-old chickens were passively immunized with antiserum against either hemagglutinin-neuraminid...
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The fluorescent antibody (FA) assay was developed for detecting the stunting syndrome agent (SSA) from intestinal tissue. Similarly, the indirect fluorescent antibody (IFA) assay was developed for detecting serum antibodies to SSA. Convalescent antiserum from turkeys orally immunized with SSA was fo...
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The role of cell-mediated immunity (CMI) in protection of birds from Newcastle disease was investigated by two different strategies in which only Newcastle disease virus (NDV)-specific CMI was conveyed without neutralizing antibodies. In the first strategy, selected 3-wk-old specific-pathogen-free (...
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Stunting syndrome is an enteric disease of young turkeys that results in reduced growth (stunting) of poults and impaired feed efficiency. A virus, which has been termed the stunting syndrome agent (SSA), causes stunting syndrome. In this study passive immunity was evaluated as a method of protectin...
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A reverse transcription-polymerase chain reaction (RT-PCR) assay for the detection of avian pneumovirus (APV), Colorado strain (US/CO), was evaluated for sensitivity and specificity. The single-tube RT-PCR assay utilized primers developed from the matrix (M) gene sequence of the US/CO APV. The RT-PC...