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PubMedDate not supplied

Testing testing.

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AIDS Serodiagnosis↗
PubMed2001

Skin manifestations in food allergy.

Skin manifestations represent the most often observed clinical symptoms in food allergy. Immediate symptoms are urticaria, angioedema and sudden erythema (flush). Delayed symptoms which can be observed are exanthema and exacerbation or worsening of eczema (most often atopic dermatitis). Since delayed symptoms are difficult to diagnose, oral provocation tests are often necessary for patients with a suspected late onset of symptoms upon food ingestion. There is evidence that besides specific IgE, specific T cells play a role in the deterioration of eczema in atopic dermatitis. Although urticarial skin lesions are most often observed upon oral provocation with a suspected food, the rate of IgE-mediated food allergy in acute or chronic urticaria is rather low. In some patients suffering from chronic urticaria, intolerance reactions are also suspected. Since no laboratory or skin tests are available yet for the identification of clinically relevant food additives causing urticaria, oral provocation tests are mandatory for these patients.

Animals↗
PubMed1998

Recruitment and screening policies and procedures used to establish a paid donor oocyte registry.

We have reviewed the demographic characteristics of, and report abnormalities noted in, the de-novo growth and development of a paid oocyte donation programme. The personal profiles of all prospective oocyte donors were reviewed. Acceptance or rejection of candidates was based upon screening the results of medical, genetic and psychological testing. A total of 603 candidates initially responded to our advertisement. From this pool, 313 individuals were considered suitable and contacted by telephone. Following further conversation, 176 women were scheduled an entry interview. On completion of the formal screening process, 17.6% (n = 31) of those actually interviewed were denied entry. Thus, from the initial interested parties, only 23% of women wishing to participate in oocyte donation were considered suitable candidates. Given the high attrition rate, we concluded that the need for rigorous and thorough medical, psychological and genetic testing is mandatory for the establishment of a donor registry. Furthermore, professional counselling of prospective donors with respect to the results of tests and the implications of test results with respect to their future medical and reproductive health, are important parts of providing comprehensive care.

Adult↗
PubMedDate not supplied

AIDS testing.

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AIDS Serodiagnosis↗
PubMed1994

Voluntary testing for human immunodeficiency virus (HIV) in a prison population with a high prevalence of HIV.

This study evaluated voluntary testing for human immunodeficiency virus (HIV) in a prison population with a high HIV seroprevalence. Data on demographic variables and participation in voluntary testing were linked to a blinded HIV serosurvey of consecutive Maryland prison entrants (April-July 1991). Among 2,842 entrants, HIV seroprevalence was 8.5% (men, 7.9%; women, 15.3%). Voluntary testing was accepted by 47% of the entrants, and it identified 34% of the HIV-seropositive inmates detected by serosurvey. Refusers of testing were more likely to test HIV-seropositive than were accepters (adjusted odds ratio (OR) = 1.84, 95% confidence interval (CI) 1.58-2.16). Refusers and accepters of testing had similar risk factors for HIV infection, chiefly current syphilis infection (adjusted OR = 5.96, 95% CI 3.15-10.27) and prior injected drug use (adjusted OR = 4.26, 95% CI 3.15-5.76). Among 100 entrants asked why they refused testing, primary reasons given included low risk of HIV, fear of testing HIV-seropositive, and lack of interest. Voluntary testing appears only moderately successful in identifying HIV-seropositive inmates in a high-seroprevalence prison population. However, the alternative, mandatory HIV testing of prisoners, can be construed as discriminatory and unethical when similar screening is not imposed on the population at large. Data presented here suggest strategies to improve acceptance of voluntary testing, especially by high risk inmates.

Adult↗
PubMedDate not supplied

Risk for transfusion-transmitted infectious diseases in Central and South America.

We report the potential risk for an infectious disease through tainted transfusion in 10 countries of South and Central America in 1993 and in two countries of South America in 1994, as well as the cost of reagents as partial estimation of screening costs. Of the 12 countries included in the study, nine screened all donors for HIV; three screened all donors for hepatitis B virus (HBV); two screened all donors for Trypanosoma cruzi; none screened all donors for hepatitis C virus (HCV); and six screened some donors for syphilis. Estimates of the risk of acquiring HIV through blood transfusion were much lower than for acquiring HBV, HCV, or T. cruzi because of significantly higher screening and lower prevalence.rates for HIV. An index of infectious disease spread through blood transfusion was calculated for each country. The highest value was obtained for Bolivia (233 infections per 10,000 transfusions); in five other countries, it was 68 to 103 infections per 10,000. The risks were lower in Honduras (nine per 10,000), Ecuador (16 per 10,000), and Paraguay (19 per 10,000). While the real number of potentially infected units or infected persons is probably lower than our estimates because of false positives and already infected recipients, the data reinforce the need for an information system to assess the level of screening for infectious diseases in the blood supply. Since this information was collected, Chile, Colombia, Costa Rica, and Venezuela have made HCV screening mandatory; serologic testing for HCV has increased in those countries, as well as in El Salvador and Honduras. T. cruzi screening is now mandatory in Colombia, and the percentage of screened donors increased not only in Colombia, but also in Ecuador, El Salvador, and Paraguay. Laws to regulate blood transfusion practices have been enacted in Bolivia, Guatemala, and Peru. However, donor screening still needs to improve for one or more diseases in most countries.

Central America↗
PubMed1977

[Current use of the sweat test (author's transl)].

A positive sweat test is still the principal diagnostic feature of cystic fibrosis. Repeated tests are mandatory in positive, borderline and any suspect cases. Pilocarpine iontophoresis and quantitative evaluation of sodium and/or chloride are the only acceptable test methods. Every effort must be made to avoid contamination of the sweat sample. Diagnostic values are more than 50 mequ/l for sodium and more than 60 mequ/l for chloride.

Cystic Fibrosis↗
PubMed1998

[The family practitioner and the postcoital test].

There is still a great deal of controversy on the value of the postcoital test. Some consider it to be a valuable method for the general practitioner to evaluate the interaction in vivo between spermatozoa and cervical mucus, in spite of the poor predictive value of the test. The postcoital test is in fact only an indirect method for the detection of the production of moving sperms. As a negative postcoital test is frequently due to bad timing of the test, multiple mandatory intercourse is often necessary, which may lead to frustration and sexual dysfunction. Moreover, there are no indications that the postcoital test with its poor discriminatory power may be better in general practice than the fertility evaluations by a specialist as standardisation and reproducibility problems are equal in both settings. Therefore semen analysis appears to be a better option, for the general practitioner as well.

Family Practice↗