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  • Howard Hagan posted an update 8 hours, 19 minutes ago

    Male and female condoms are the only available Multipurpose Prevention Technologies (MPTs) that can prevent unintended pregnancy and sexually transmitted infections including HIV. If used correctly and consistently, condoms can provide levels of pregnancy protection similar to many hormonal methods. Condoms remain one of the most common methods used at first sexual intercourse and are relied on as a current use of contraception by adolescents in many regions of the world. Male and female condoms are safe and require no prescription; in particular male condoms are generally easy to access at low cost. Female condoms are more expensive than male condoms and less accessible; however, they have the advantage of being a female-initiated method. Condom users may experience some common challenges; however, recent advances in condom technology have led to new designs and modifications of existing products to improve quality and make them more attractive, acceptable and pleasurable for consumers and increase its use. Cardiovascular disease is the leading cause of the death for both men and women. Although baseline heart physiology and the response to disease are known to differ by sex, little is known about sex differences in baseline molecular signaling, especially with regard to redox biology. In this review, we describe current research on sex differences in cardiac redox biology with a focus on the regulation of nitric oxide and aldehyde signaling. Furthermore, we argue for a new perspective on cardiovascular sex differences research, one that focuses on baseline redox biology without the elimination or disruption of sex hormones. Infection with helminths in sub-Saharan Africa could modulate the immune response towards Plasmodium falciparum as well as susceptibility to malaria infection and disease. The aim of this study is to assess the antibody responses to helminths species in malaria-exposed populations from Burkina Faso. Plasma samples were collected in rural villages inhabited by Fulani, Mossi and Rimaibe communities, and IgG against parasitic helminths were measured by ELISA. The prevalence of IgG against antigens of Strongyloides stercoralis, Wuchereria bancrofti and Schistosoma haematobium (Soluble Egg Antigen, SEA) was 5%, 16% and 63% respectively, in line with estimates of infection prevalence in the region for the three parasites. Anti-SEA IgG prevalence was highest at 10-20 years of age, higher in males than females, and did not show differences between ethnic groups. However, the Fulani showed lower levels of anti-SEA IgG suggesting that lighter S. haematobium infections may occur in the ethnic group known for a marked lower susceptibility to P. falciparum. The present data support the use of serological methods for integrated surveillance of neglected tropical diseases such as soil-transmitted helminths, lymphatic filariasis and bilharzia. Furthermore, as helminth infections might promote downregulation of immune responses against intracellular pathogens, the observation of lower anti-SEA IgG levels in the malaria resistant Fulani population warrants further investigation into the immunological cross-talk between S. haematobium and P. falciparum in this geographical region. Diagnostic testing in the infectious disease laboratory facilitates decision-making by physicians at the bedside as well as epidemiological assessments and surveillance at study level. Problems may arise if test results are uncritically considered as being the same as the unknown true value. To allow a better understanding, the influence of external factors on the interpretation of test results is introduced with the example of prevalence, followed by the presentation of strengths and weaknesses of important techniques in the infectious disease laboratory like microscopy, cultural diagnostics, serology, mass spectrometry, nucleic acid amplification and hypothesis-free metagenomic sequencing with focus on basic, high-technology and potential future approaches. Special problems like multiplex testing as well as uncertainty of test evaluations, if no gold standard is available, are also stressed with a final glimpse on emerging future technologies for the infectious disease laboratory. In the conclusions, suitability for point-of-care-testing and field laboratory applications is summarized. The aim is to illustrate the limitations of diagnostic accuracy to both clinicians and study planners and to stress the importance of close cooperation with experts in laboratory disciplines so as to avoid potentially critical misunderstandings due to inappropriate interpretation of diagnostic test results. Identification of the host blood meal of hematophagous insects can provide significant information regarding host preferences and the possibility of the transmission of disease agents. find more Currently, this knowledge is limited for black flies in the Oriental region. In this study, we used cytochrome b gene sequences for identification of blood meal sources of two black fly taxa, the Simulium asakoae complex and S. chumpornense Takaoka & Kuvangkadilok in Thailand. A total of 4,260 wild adult females were visually screened revealing 24 blood-engorged females from which cytochrome b was successfully amplified in 19 individuals. Comparisons in GenBank database revealed that all are closest to chicken (Gallus gallus) with sequence similarity of >98%. Therefore, these black fly species are feeding on chickens. We also molecularly investigated the hemosporidian blood protozoa genus Leucocytozoon in black flies and found 13 of 19 blood-engorged females positive for this protozoon. Sequence analysis revealed that this Leucocytozoon DNA could be assigned into two previously recognized groups, one with a Leucocytozoon reported from domestic chickens and black flies in Thailand, and another close to the L. schoutedeni. Our results indicate a high possibility that the S. asakoae complex and S. chumpornense are natural vectors of Leucocytozoon. Clonorchis sinensis infection is caused by ingestion of raw freshwater fish containing the infective larvae of Clonorchis sinensis. It is highly endemic in East Asia, especially in China. Selective chemotherapy of people who report habitual eating of raw freshwater fish is a control measure. As the performance of this screening technique has not yet been fully evaluated in China, a cross-sectional study was conducted, covering 16 counties in four major clonorchiasis-endemic provinces. About 1 000 participants were enrolled from each county. In total, 16 230 participants were enrolled from 16 counties. Faecal samples were collected and examined for helminth eggs and each person enrolled was asked about their practice with respect to eating raw freshwater fish. The overall prevalence of C. sinensis infection was 10.8% among 16 230 participants, ranging from 0 to 53.7% in the 16 counties, while the percentage of inhabitants commonly eating raw freshwater fish was 26.5%, ranging from 0 to 79.1%. The overall sensitivity and specificity of screening for C.

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