Endopeptidase-24.11, an ectoenzyme with a key role in metabolizing peptides at cell surfaces, is present in the adenohypophysis. A specific polyclonal antibody to the endopeptidase has been used to explore its localization in cryostat sections of pig pituitary glands by an immunoperoxidase method. Immunoreactivity was symmetrically but not uniformly distributed over the anterior lobe, with the highest intensity a zone just beneath the capsule along the anterior surface. In detail, the staining was observed to be in the cell membrane, but in some cells a small area of intense paranuclear staining was also observed. Serial 5 micron sections were immunostained alternately for endopeptidase-24.11 and for pituitary proteohormone. Luteinizing hormone (LH), follicular stimulating hormone (FSH), thyrotropin, adrenocorticotropin, prolactin and growth hormone were studied in this way. It was possible to identify groups of cells in adjacent sections and a good correlation was observed for endopeptidase-24.11-immunoreactivity with that for LH and FSH. The association of the endopeptidase with gonadotrophs was confirmed by double labelling. No evidence of colocalization was observed with the other proteohormone antibodies. We conclude that among the cells of the adenohypophysis only the gonadotrophs express endopeptidase-24.11 and discuss the possible significance of this observation in regard to the termination of peptide signals, such as that of luteinizing hormone-releasing hormone (LHRH) acting at this site.

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Infectivity of Plasmodium falciparum gametocytes to Anopheles arabiensis after treatment with sulfadoxine-pyrimethamine.

Sulfadoxine-pyrimethamine induces increased gametocytaemia when used for treating Plasmodium falciparum malaria. Laboratory-reared Anopheles arabiensis mosquitoes were fed with blood from patients with post-therapeutic gametocytaemia using a membrane feeder. Fourteen days later the heads and thoraxes of 613 mosquitoes were negative for P. falciparum sporozoites by enzyme-linked immunosorbent assay.

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Transcultural nursing practice described by registered nurses and baccalaureate nursing students.

Using Leininger's Theory of Culture Care Diversity and Universality as a framework, this research examined transcultural practices of nurses and students. A survey was administered to a convenience sample of registered nurses and senior baccalaureate students with 767 usable questionnaires returned. Neither group expressed confidence in their ability to care for culturally-diverse patients. Registered nurses (RNs) reported assessing cultural factors and modifying practices more frequently than did students. Respondents reported their beliefs about transcultural nursing were influenced by being with people of other cultures, their own personal values, and education. Analysis of the open-ended questions revealed two major themes. First, both nurses and students perceive an overwhelming need for transcultural nursing. Second, nurses and students respond to cultural challenges by modifying their care. Modifications are based on language and communication, pain perception and relief, religious and spiritual dimensions, gender and family roles, and other values. Results suggest that nurses and students are aware of culture, recognize that culture influences the care they provide, and modify their health teaching and nursing care based on culture. The use of a conceptual framework to help make modifications in care was not mentioned.

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