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The polymerase chain reaction (PCR) was used on material from a blighted ovum to confirm indirectly the carrier status of a woman with a family history of Becker muscular dystrophy. Conventional testing including creatine kinase levels, muscle biopsy, and EMG had been inconclusive, and on the basis of one elevated creatine kinase level, the woman had been designated a possible carrier. Ultrasound examination at 10 weeks of pregnancy indicated a blighted ovum, from which DNA was subsequently extracted and subjected to PCR testing for determination of sex and genotypic status with respect to the known familial deletion of the dystrophin gene. The blighted ovum was found to have a Y chromosome and also to be deleted for at least exon 6 of the dystrophin gene, indirectly indicating that the mother most likely carried the family mutation for Becker muscular dystrophy. 相似文献
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Edmilson F. de Oliveira-Filho Kennya G. S. Lopes Deivson S. Cunha Virginia S. Silva Clara N. Barbosa Daniel F. Brandespim José Wilton Pinheiro Junior Giovani R. Bertani Laura H. V. G. Gil 《Food and environmental virology》2017,9(3):256-259
Anti-HEV antibodies were detected in animals from abattoir and in farms from northeast Brazil. Our results suggest that HEV is highly disseminated in the swine population and might present a great risk to animal handlers and for consumption of raw or undercooked meat and meat products in northeast Brazil. 相似文献
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Among both forest practitioners and the general public, “forest health” has become an issue of contention. Whereas the debate
over which treatments will best achieve healthy forests has been framed largely by the popular media and politicians as a
struggle between industry and environmentalists, the views of the general public remain unexplored. Survey results from Oregon
and Washington residents were used to assess the relationships between respondents’ self-described environmental or economic
priorities and the following two variables: (1) acceptability of forest management practices and (2) perceived threats to
forest health. Findings indicate that active management was generally accepted by a majority of respondents regardless of
their environmental or economic orientation. Disagreement emerged, however, when the appropriateness of specific management
practices within specific forest conditions was examined. Additionally, strong evidence was found for a relationship between
self-described environmental or economic orientation and perceived threats to forest health. Those with an environmentally
oriented viewpoint tended to perceive human-caused factors as the largest threats, whereas those with an economic orientation
saw naturally occurring processes as the greatest threats. These findings suggest that the issue of contention is not active
management per se. Rather, the major divisions in the forest health debate are defined by specific contexts and circumstances,
as well as the management practices used. 相似文献
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Leeanda Wilton 《黑龙江环境通报》2002,22(6):512-518
Embryonic aneuploidies may be responsible for pregnancy failure in many IVF patients. In recent years, fluorescent in situ hybridisation (FISH) for multiple chromosomes has been used to document a high frequency of chromosomal errors and aneuploidy in human preimplantation embryos and, after embryo biopsy, to select embryos that are more likely to implant. Such studies suggest that women with recurrent miscarriage and advanced maternal age may benefit most from preimplantation genetic diagnosis with aneuploidy screening (PGD-AS). The success of PGD-AS is likely to be enhanced by new technologies, such as comparative genomic hybridisation, which enable full karyotyping of single cells. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
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