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https://www.readbyqxmd.com/read/29238342/breastfeeding-behaviors-and-the-innate-immune-system-of-human-milk-working-together-to-protect-infants-against-inflammation-hiv-1-and-other-infections
#1
REVIEW
Bethany M Henrick, Xiao-Dan Yao, Laila Nasser, Ava Roozrogousheh, Kenneth L Rosenthal
The majority of infants' breastfeeding from their HIV-infected mothers do not acquire HIV-1 infection despite exposure to cell-free virus and cell-associated virus in HIV-infected breast milk. Paradoxically, exclusive breastfeeding regardless of the HIV status of the mother has led to a significant decrease in mother-to-child transmission (MTCT) compared with non-exclusive breastfeeding. Although it remains unclear how these HIV-exposed infants remain uninfected despite repeated and prolonged exposure to HIV-1, the low rate of transmission is suggestive of a multitude of protective, short-lived bioactive innate immune factors in breast milk...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29220369/can-mother-to-child-transmission-of-hiv-be-eliminated-without-addressing-the-issue-of-stigma-modeling-the-case-for-a-setting-in-south-africa
#2
Holly J Prudden, Matthew Hamilton, Anna M Foss, Nicole Dzialowy Adams, Melissa Stockton, Vivian Black, Laura Nyblade
BACKGROUND: Stigma and discrimination ontinue to undermine the effectiveness of the HIV response. Despite a growing body of evidence of the negative relationship between stigma and HIV outcomes, there is a paucity of data available on the prevalence of stigma and its impact. We present a probabilistic cascade model to estimate the magnitude of impact stigma has on mother-to-child-transmission (MTCT). METHODS: The model was parameterized using 2010 data from Johannesburg, South Africa, from which loss-to-care at each stage of the antenatal cascade were available...
2017: PloS One
https://www.readbyqxmd.com/read/29195717/the-efficacy-of-two-different-dosages-of-hepatitis-b-immunoglobulin-combined-with-hepatitis-b-vaccine-in-preventing-mother-to-child-transmission-of-hepatitis-b-virus-a-prospective-cohort-study
#3
Kai-Ping Wei, Feng-Cai Zhu, Jian-Xun Liu, Ling Yan, Ying Lu, Xiang-Jun Zhai, Zhan-Jun Chang, Ying Zeng, Jie Li, Hui Zhuang
BACKGROUND/AIMS: A birth dose of hepatitis B immunoglobulin (HBIG), in combination with hepatitis B vaccine (HepB), is recommended for infants born to hepatitis B surface antigen (HBsAg)-positive mothers. However, the optimal dosage of HBIG remains to be resolved. This prospective cohort study aimed to compare the efficacy of two dosages of HBIG combined with HepB to prevent mother-to-child transmission (MTCT) of HBV. METHODS: From 2009 to 2011, we prospectively enrolled mother-infant pairs with positive maternal HBsAg in China...
November 28, 2017: Vaccine
https://www.readbyqxmd.com/read/29194878/knowledge-regarding-hepatitis-b-mother-to-child-transmission-among-healthcare-workers-in-south-china
#4
Yiru Chen, Chan Xie, Ying Zhang, Yiting Li, Youming Chen, Chao-Shuang Lin
To determine the knowledge regarding hepatitis B virus mother-to-child transmission (MTCT) and its prevention and treatment among healthcare workers in Guangdong province, China, an Hepatitis B virus endemic area. An HBV knowledge questionnaire was administered to 900 healthcare workers (HCWs) from the 3rd Affiliated Hospital of Sun Yat-Sen University and two rural hospitals in Guangdong province. The 27 items in the questionnaire fell into three sections: HBV mother-to-child transmission general knowledge, respondents' practices of preventing HBV mother-to-child transmission, awareness of the resources of preventing HBV mother-to-child transmission...
November 30, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29165760/factors-responsible-for-mother-to-child-transmission-mtct-of-hiv-1-a-review
#5
J-F Liu, G Liu, Z-G Li
Many factors have been identified to influence the risk of mother to child transmission (MTCT) of HIV. Chief amongst these is high maternal VL and advanced disease. High maternal viral load (mVL), measured at delivery, has been described as the strongest risk factor for both in utero (IU) and intrapartum (IP) transmission. Similarly, CD4+ T cell count and clinical stage of infection are also the confirmed significant predictors of transmission. Correspondingly, higher mVL in the genital tract has also been independently associated with a higher risk of MTCT of HIV-1...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29165086/association-between-ltf-polymorphism-and-risk-of-hiv-1-transmission-among-zambian-seropositive-mothers
#6
Luisa Zupin, Vania Polesello, Ludovica Segat, Anselmo Jiro Kamada, Louise Kuhn, Sergio Crovella
BACKGROUND: Lactoferrin is a member of the innate immune system acting in the first line of defence against pathogens, and it is known for its antibacterial, antifungal and antiviral activity, including HIV-1. Two polymorphisms, T29A and R47K, in the exon 1 region of the LTF gene (encoding for the lactoferrin protein) were previously described as able to influence the lactoferrin antimicrobial function. OBJECTIVES: LTF T29A and R47K genetic variants were analysed in a Zambian population to unravel if these polymorphisms could play a role in HIV-1 mother-to-child HIV-1 transmission...
November 19, 2017: Current HIV Research
https://www.readbyqxmd.com/read/29161262/the-value-of-confirmatory-testing-in-early-infant-hiv-diagnosis-programmes-in-south-africa-a-cost-effectiveness-analysis
#7
Lorna Dunning, Jordan A Francke, Divya Mallampati, Rachel L MacLean, Martina Penazzato, Taige Hou, Landon Myer, Elaine J Abrams, Rochelle P Walensky, Valériane Leroy, Kenneth A Freedberg, Andrea Ciaranello
BACKGROUND: The specificity of nucleic acid amplification tests (NAATs) used for early infant diagnosis (EID) of HIV infection is <100%, leading some HIV-uninfected infants to be incorrectly identified as HIV-infected. The World Health Organization recommends that infants undergo a second NAAT to confirm any positive test result, but implementation is limited. Our objective was to determine the impact and cost-effectiveness of confirmatory HIV testing for EID programmes in South Africa...
November 2017: PLoS Medicine
https://www.readbyqxmd.com/read/29082650/prospective-cohort-study-on-the-efficacy-and-safety-of-telbivudine-used-throughout-pregnancy-in-blocking-mother-to-child-transmission-of-hepatitis-b-virus
#8
W Yi, M-H Li, Y Xie, J Wu, Y-H Hu, D Zhang, Y Zhang, W-H Cao
Women with chronic hepatitis B should maintain nucleotide analogue treatment to prevent disease progression during pregnancy. The aim of this study was to prospectively evaluate the efficacy and safety of telbivudine used throughout pregnancy for preventing hepatitis B virus (HBV) mother-to-child transmission (MTCT). From January 2012 to June 2014, women who were receiving telbivudine therapy and became pregnant were enrolled in group A at 28 weeks of gestation. Pregnant women with an HBV DNA level >106  IU/mL were enrolled in either group B (telbivudine started at 28 weeks of gestation) or group C (control group without treatment)...
November 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29082646/safety-and-efficacy-of-telbivudine-for-chronic-hepatitis-b-during-the-entire-pregnancy-long-term-follow-up
#9
J Shang, Q Wen, C C Wang, K Liu, L Bai, H Tang
The management of hepatitis B virus (HBV) infection in pregnancy is a unique issue. Telbivudine (LdT) is recommended to block HBV mother-to-child transmission (MTCT) in the third trimester. However, the safety of LdT treatment during the entire pregnancy for the long-term growth of infants is unclear. The aim of this study was to evaluate the efficacy and long-term safety of LdT for the entire pregnancy period. This retrospective cohort study included 40 pregnant women and 43 children from 2011 to 2017. The antiviral effects and maternal abnormalities were evaluated...
November 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/29066544/maternal-but-not-infant-anti-hiv-1-neutralizing-antibody-response-associates-with-enhanced-transmission-and-infant-morbidity
#10
Melissa Ghulam-Smith, Alex Olson, Laura F White, Charles S Chasela, Sascha R Ellington, Athena P Kourtis, Denise J Jamieson, Gerald Tegha, Charles M van der Horst, Manish Sagar
A significant number of infants acquire HIV-1 through their infected mother's breast milk, primarily due to limited access to antiretrovirals. Passive immunization with neutralizing antibodies (nAbs) may prevent this transmission. Previous studies, however, have generated conflicting results about the ability of nAbs to halt mother-to-child transmission (MTCT) and their impact on infant outcomes. This study compared plasma neutralizing activity in exposed infants and the infected mothers (n = 63) against heterologous HIV-1 variants and the quasispecies present in the mother...
October 24, 2017: MBio
https://www.readbyqxmd.com/read/29042915/the-innovation-of-the-subspecialty-of-paediatric-virology-an-interview-with-research-professor-of-molecular-virology-anna-kramvis
#11
Ioannis N Mammas, Demetrios A Spandidos
Professor Anna Kramvis, Research Professor of Molecular Virology at the University of the Witwatersrand in Johannesburg, South Africa, talks about direct-acting antiviral treatments against hepatitis C virus (HCV), as well as the perspective of the development of an effective vaccine against HCV. She emphasises the necessity of vaccination against hepatitis B virus (HBV), highlighting that it is very important that vaccination should be administered at birth in order to prevent mother-to-child transmission (MTCT) of HBV...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29027107/viral-factors-for-hbv-mother-to-child-transmission
#12
James S Park, Calvin Q Pan
Chronic hepatitis B virus (HBV) remains a leading cause of cirrhosis and hepatocellular carcinoma worldwide. Because chronic hepatitis B infection is rarely eradicated, preventing mother-to-child transmission (MTCT) is the most effective strategy to eliminate HBV globally. Although immunoprophylaxis strategy is widely available and effective for infants born to mothers with chronic hepatitis B infection, postnatal immunoprophylaxis fails in approximately 5-10 % of infants, and this failure rate goes up to 30 % in infants born to highly viremic mothers...
October 12, 2017: Hepatology International
https://www.readbyqxmd.com/read/29020844/nucleoside-nucleotide-analogues-in-the-treatment-of-chronic-hepatitis-b-infection-during-pregnancy-a-systematic-review
#13
Soheil Tavakolpour, Mohammad Darvishi, Hajar Sadat Mirsafaei, Mojtaba Ghasemiadl
BACKGROUND: Women of childbearing age who have developed chronic hepatitis B (CHB) infection, especially HBeAg-positive highly viraemic pregnant women, are largely responsible for the familial transmission of the infection. Therefore, choosing the most effective and safest antiviral medications to manage pregnant CHB patients is of crucial importance. MATERIALS AND METHODS: The PubMed and Scopus databases were searched through September 2017, for all the journal articles possessing original results regarding treatment of CHB pregnant women with any nucleos(t)ide analogue (NA) therapies, including lamivudine (LAM), adefovir (ADV), entecavir (ETV), telbivudine (LdT), and tenofovir (TDF)...
October 11, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28984760/implementation-effectiveness-of-revised-post-2010-world-health-organization-guidelines-on-prevention-of-mother-to-child-transmission-of-hiv-using-routinely-collected-data-in-sub-saharan-africa-a-systematic-literature-review
#14
REVIEW
Sehlulekile Gumede-Moyo, Suzanne Filteau, Tendai Munthali, Jim Todd, Patrick Musonda
BACKGROUND: To synthesize and evaluate the impact of implementing post-2010 World Health Organization (WHO) prevention of mother-to-child transmission (PMTCT) guidelines on attainment of PMTCT targets. METHODS: Retrospective and prospective cohort study designs that utilized routinely collected data with a focus on provision and utilization of the cascade of PMTCT services were included. The outcomes included the proportion of pregnant women who were tested during their antenatal clinic (ANC) visits; mother-to-child transmission (MTCT) rate; adherence; retention rate; and loss to follow-up (LTFU)...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28935971/prevalence-of-chronic-hepatitis-b-and-status-of-hbv-care-among-rural-women-who-planned-to-conceive-in-china
#15
Yuanyuan Wang, Hong Zhou, Long Zhang, Qiuyue Zhong, Qiaomei Wang, Haiping Shen, Man Zhang, Yanjie Huang, Anqi Wang, Kenrad Nelson, Yiping Zhang, Donghai Yan, Zuoqi Peng, Ya Zhang, Xiaona Xin, Hongguang Zhang, Jun Zhao, Yan Wang, Ying Yang, Yuan He, Jihong Xu, Xiaoli Liu, Yan Wang, Xu Ma
Globally, one third of prevalent chronic hepatitis B (CHB) virus infection (HBV) occurred in China. Assessing the prevalence of CHB infesction and status of HBV-related services among pre-conception women will provide insight into risks of mother to child transmission (MTCT). A cross-sectional analysis of data from the National Free Pre-pregnancy Checkups (NFPC) program in 2010-2014 was conducted. A standardized questionnaire which collected demographic information and enzyme-linked immunosorbent assays (ELISA) which tested serological HBV markers were applied...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28928750/the-role-of-maternal-hiv-envelope-specific-antibodies-and-mother-to-child-transmission-risk
#16
REVIEW
Ayooluwa O Douglas, David R Martinez, Sallie R Permar
Despite the wide availability of antiretroviral therapy (ART) prophylaxis during pregnancy, >150,000 infants become infected through mother-to-child transmission (MTCT) of HIV worldwide. It is likely that additional intervention strategies, such as a maternal HIV vaccine, will be required to eliminate pediatric HIV infections. A deeper understanding of the fine specificity and function of maternal HIV envelope (Env)-specific responses that provide partial protection against MTCT will be critical to inform the design of immunologic strategies to curb the pediatric HIV epidemic...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28899348/cesarean-section-to-prevent-mother-to-child-transmission-of-hepatitis-b-virus-in-china-a-meta-analysis
#17
Mei Yang, Qin Qin, Qiong Fang, Lixin Jiang, Shaofa Nie
BACKGROUND: Hepatitis B virus (HBV) is predominantly transmitted through mother-to-child transmission (MTCT). To date, it remains unclear whether the method of parturition affects MTCT of HBV. In order to clarify whether cesarean section, when compared with vaginal delivery, could reduce the risk of MTCT of HBV in China, we conducted this meta-analysis. METHODS: A systematic literature search was performed of the PubMed (Medline), Embase, ISI Web of Science, China Biological Medicine Database, China National Knowledge Infrastructure, and VIP Database for Chinese Technical Periodicals databases for articles written in English or Chinese through July 2015...
September 12, 2017: BMC Pregnancy and Childbirth
https://www.readbyqxmd.com/read/28860476/quantifying-perinatal-transmission-of-hepatitis-b-viral-quasispecies-by-tag-linkage-deep-sequencing
#18
Yushen Du, Xiumei Chi, Chong Wang, Jing Jiang, Fei Kong, Hongqing Yan, Xiaomei Wang, Jie Li, Nicholas C Wu, Lei Dai, Tian-Hao Zhang, Sara Shu, Jian Zhou, Janice M Yoshizawa, Xinmin Li, Debika Bhattacharya, Ting-Ting Wu, Junqi Niu, Ren Sun
Despite full immunoprophylaxis, mother-to-child transmission (MTCT) of Hepatitis B Virus still occurs in approximately 2-5% of HBsAg positive mothers. Little is known about the bottleneck of HBV transmission and the evolution of viral quasispecies in the context of MTCT. Here we adopted a newly developed tag linkage deep sequencing method and analyzed the quasispecies of four MTCT pairs that broke through immunoprophylaxis. By assigning unique tags to individual viral sequences, we accurately reconstructed HBV haplotypes in a region of 836 bp, which contains the major immune epitopes and drug resistance mutations...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28839513/knowledge-and-awareness-of-mtct-and-pmtct-post-natal-follow-up-services-among-hiv-infected-mothers-in-the-mankweng-region-south-africa
#19
Refilwe Ramoshaba, Sello Levy Sithole
BACKGROUND: The pandemic of Human Immunodeficiency Virus (HIV) is the most severe health challenge affecting children across the world. It is estimated that more than 90% of all HIV infections in children result from Mother-to-Child Transmission (MTCT). Poor knowledge and awareness of MTCT and Prevention of Mother-to-Child Transmission (PMTCT) among HIV positive mothers and their babies is a major setback to the success of the PMTCT programmes. METHODS: A qualitative approach and a cross-sectional design were applied in this study...
2017: Open AIDS Journal
https://www.readbyqxmd.com/read/28819511/male-partner-involvement-in-the-prevention-of-mother-to-child-transmission-of-hiv-infection-in-mwanza-region-tanzania
#20
Munda Elias, Elia John Mmbaga, Ahmed Abade Mohamed, Rogath Saika Kishimba
INTRODUCTION: Globally, there are 3.3 million children < 15 years of age living with HIV infection. About 95% of HIV infected children have acquired infection from their mothers. Although new pediatric HIV infection in Tanzania has declined by 48% and Prevention of Mother to Child Transmission (PMTCT) coverage of highly active anti-retroviral therapy (HAART) has increased to 77%, the MTCT rate remains high (15%). Poor male partner involvement in PMTCT services is one of the factors contributing to reduced effectiveness of the PMTCT and hence failure to achieve the elimination of maternal to child transmission of HIV...
2017: Pan African Medical Journal
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