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  1. 1
    077662

    WHO laboratory manual for the examination of human semen and semen-cervical mucus interaction. 2nd ed.

    World Health Organization [WHO]. Special Programme of Research, Development and Research Training in Human Reproduction

    Cambridge, England, Cambridge University Press, 1987. [7], 67 p.

    The WHO Special Programme of Research, Development and Research Training in Human Reproduction has revised its manual designed to standardize procedures for the examination of human semen. This revised manual, for instance, describes a simplified method for screening the morphology of cellular elements other than spermatozoa; the previous method now appears in the section on optional procedures. WHO has also included methods to determine the presence of spermatozoa antibodies. The manual has guidelines on measurement of biochemical components of seminal plasma to evaluate the secretory function of accessory glands (e.g., fructose indicates secretory function of the seminal vesicles). Even though these biochemical tests may not mark a man's fertility, they demonstrate the functional state of these glands. Besides, someday they may even help assess the possible effects of xenobiotic factors and of disease. Some researchers believe adenosine triphosphate levels are linked to spermatozoal function and that the zona free hamster oocyte test can determine the ability of human spermatozoa to join with the oocyte; so WHO has listed protocols for these 2 tests. The manual also has protocols to assess the ability of spermatozoa to penetrate cervical mucus in vitro: the microscopic method and the capillary tube test. WHO believes that determining this ability is important when evaluating the fertility of a couple. The Standard Procedures section on collection and examination of human semen considers appearance, volume, consistency, pH, motility, preparation and grading, agglutination, sperm viability, sperm count, and testing for antibody-coating of spermatozoa. The section on sperm cervical mucus interaction examines volume, consistency, ferning, spinnbarkeit, cellularity, pH, and in vivo and in vitro tests. It hopes that researchers will adapt the standard procedures presented in this manual to improve quality control between laboratories and allow aggregation of data from several sources for analysis.
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  2. 2
    051765

    Neonatal tetanus: strategies for disease control.

    Frank DL

    [Unpublished] 1987 Apr 30. [4], 53 p.

    Neonatal tetanus, caused by the toxin of Clostridium tetani, is transmitted via unclean instruments used to cut the umbilical cord or contaminated dressings applied to the stump. The symptoms are inability to suck, trismus, convulsions, and (in 80-90% of cases) death on the 7th or 8th day. In the US between 1982 and 1984 only 2 cases of neonatal tetanus were reported; in the developing world an estimated 800,000 infants die of neonatal tetanus every year. The survey methodology used to determine the neonatal tetanus death rate was a 2-stage sampling method, known as the Expanded Program on Immunization 30 cluster sampling method, followed by questionnaires. Such surveys contain a certain amount of built-in bias due both to fact that the final selection of households is never completely random and that retrospectively gathered information is subject to recall bias. The surveys indicated that neonatal tetanus incidence was highest in rural areas, especially where animals were present; in the slums of cities; among families with many children; where mothers received no prenatal care; and where birth attendants were untrained. The best preventive strategy against neonatal tetanus is provided through immunization of the mother with tetanus toxoid, since the antibodies cross the placenta and protect the infant through the neonatal period. Unfortunately, the tetanus vaccination program lags at least 30% behind other World Health Organization Expanded Program on Immunization coverage. The World Health Organization recommends an initial immunization with .01 antitoxin International Units per milliliter of serum, a 2nd dose 4 weeks later (at least 2 weeks before delivery) and booster doses on each successive pregnancy up to 5; the 5th booster provides lifetime protection. Immunization should also be carried out among nonpregnant women of childbearing age and children. The World Health Organization has proposed that neonatal tetanus be made a reportable disease, which should be combatted by prenatal immunization of mothers and training of traditional birth attendants. Between 60% and 80% of all births in developing countries are attended by traditional birth attendants, but, except in China, the training of traditional birth attendants has not contributed as much to reduction of neonatal tetanus as has immunization. Alternative strategies for carrying out tetanus immunization programs include integrating them into prenatal clinics, schools, family planning programs, maternal food distribution programs, well-baby care centers, mass campaigns (especially in urban areas), and mobile team outreach strategies in rural areas. Tetanus immunization could also be linked to other Expanded Program on Immunization programs even though these are mainly targeted at children rather than mothers and other women of childbearing age. Indonesia initiated a tetanus immunization program in 1977 and a traditional birth attendant training program with assistance from the UN Childrens Fund in 1978. However, 3 neonatal tetanus surveys, conducted in 19 provinces, the city of Jakarta, and Java, estimated the total number of deaths/year from neonatal tetanus as 71,150--a neonatal tetanus mortality rate of 11/1000. 3 provincial level studies, also using the Expanded Program on Immunization 30 cluster sampling method, in Nusa Tenggara Barat, West Sumatra Province, and Daerah Istemewah Aceh revealed neonatal tetanus mortality rates of 8.3/1000, 18.5/1000, and 8.4/1000 respectively. In the Health portion of Indonesia's 4th 5-year plan (Pelita IV), the 1st priority is given to reducing the neonatal death rate of 93/1000 live births; the 7th priority is reduction of mortality due to neonatal tetanus by ensuring adequate immunization as part of routine health services and by requiring 2 tetanus immunizations of all women applying for a marriage certificate.
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