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https://www.readbyqxmd.com/read/28214384/placental-pathology-in-hiv-infection-at-term-a-comparison-with-hiv-uninfected-women
#1
Emma Kalk, Pawel Schubert, Julie A Bettinger, Mark F Cotton, Monika Esser, Amy Slogrove, Colleen A Wright
OBJECTIVES: To describe and correlate placental characteristics from pregnancies in HIV-infected and HIV-negative women with maternal and infant clinical and immunological data. METHODS: Prospective descriptive study of placentas from term, uncomplicated vaginal births in a cohort of HIV-infected (n=120) and HIV-negative (n=103) women in Cape Town, South Africa. Microscopic and macroscopic features were used to determine pathological cluster diagnoses. The majority of HIV-infected women received some form of drug treatment for the prevention of vertical transmission of HIV...
February 18, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28212643/vertical-hiv-transmission-in-perinatally-exposed-infants-in-south-rift-region-of-kenya-a-retrospective-cross-sectional-study
#2
Everline Ashiono, Dunstan Achwoka, Jamlick Mutugi, Joel Rakwar, Andrew Wafula, Otto Nzapfurundi Chabikuli
BACKGROUND: Despite proven efficacy of the prevention mother-to-child transmission of HIV strategy, its adoption in Africa has remained slow. In Kenya, its effectiveness remain unknown. The aim of this study was to assess the effectiveness of a prevention of mother-to-child transmission program in Kenya. METHODS: This retrospective cross-sectional study analyzed 2,642 records of HIV-exposed infants who had a deoxyribonucleic acid polymerase chain reaction test done...
February 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28212379/distribution-and-abundance-of-key-vectors-of-rift-valley-fever-and-other-arboviruses-in-two-ecologically-distinct-counties-in-kenya
#3
Rosemary Sang, Samwel Arum, Edith Chepkorir, Gladys Mosomtai, Caroline Tigoi, Faith Sigei, Olivia Wesula Lwande, Tobias Landmann, Hippolyte Affognon, Clas Ahlm, Magnus Evander
BACKGROUND: Rift Valley fever (RVF) is a mosquito-borne viral zoonosis of ruminants and humans that causes outbreaks in Africa and the Arabian Peninsula with significant public health and economic consequences. Humans become infected through mosquito bites and contact with infected livestock. The virus is maintained between outbreaks through vertically infected eggs of the primary vectors of Aedes species which emerge following rains with extensive flooding. Infected female mosquitoes initiate transmission among nearby animals, which amplifies virus, thereby infecting more mosquitoes and moving the virus beyond the initial point of emergence...
February 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28209492/reproductive-considerations-in-the-setting-of-chronic-viral-illness
#4
REVIEW
Brent M Hanson, Jessie A Dorais
Special considerations must be taken when patients with human immunodeficiency virus (HIV), Hepatitis B, or Hepatitis C desire to achieve pregnancy. Patients with chronic viral illnesses desire children at rates similar to the general population, and options are available to decrease both vertical transmission and viral transmission between partners. Preconception counseling or consultation with fertility specialists is imperative in patients with HIV, Hepatitis B, and Hepatitis C so that reproductive goals can be addressed and optimized...
February 13, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28208602/a-review-of-the-strain-diversity-and-pathogenesis-of-chicken-astrovirus
#5
REVIEW
Victoria J Smyth
Although a relatively recently emerged virus, identified only in 2004 as a separate species of avian astrovirus, chicken astrovirus (CAstV) has been associated with poor growth of broiler flocks, enteritis and diarrhea and is a candidate pathogen in cases of runting stunting syndrome. More recently CAstV has been implicated in cases of two other diseases of broilers as the sole etiological agent, namely severe kidney disease of young broilers with visceral gout and the "White Chicks" hatchery disease. Examination of the strains of CAstV associated with the two latter diseases reveals they are closely related genetically...
February 10, 2017: Viruses
https://www.readbyqxmd.com/read/28208248/development-of-a-sers-based-rapid-vertical-flow-assay-for-point-of-care-diagnostics
#6
O J R Clarke, B L Goodall, H P Hui, N Vats, C L Brosseau
Point-of-care (POC) diagnostic testing platforms are a growing sector of the healthcare industry as they offer the advantages of rapid provision of results, ease of use, reduced cost, and the ability to link patients to care. While many POC tests are based on chromatographic flow assay technology, this technology suffers from a lack of sensitivity along with limited capacity for multiplexing and quantitative analysis. Several recent reports have begun to investigate the feasibility of coupling chromatographic flow platforms to more advanced read-out technologies which in turn enable on-site acquisition, storage, and transmission of important healthcare metrics...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28202792/towards-a-new-strategy-for-the-diagnosis-of-congenital-trypanosoma-cruzi-infection
#7
Alba Abras, Carmen Muñoz, Cristina Ballart, Pere Berenguer, Teresa Llovet, Mercedes Herrero, Silvia Tebar, María-Jesús Pinazo, Elizabeth Posada, Carmen Martí, Victoria Fumadó, Jordi Bosch, Oriol Coll, Teresa Juncosa, Gemma Ginovart, Josep Armengol, Joaquim Gascón, Montserrat Portús, Montserrat Gállego
The immigration of Latin American women of childbearing age has spread the congenital transmission of Chagas disease to non-endemic areas, and the disease is now a worldwide problem. Some European health authorities have implemented screening programs to prevent vertical transmission, but the lack of a uniform protocol calls for the urgent establishment of a new strategy, common for all laboratories. Our aims were (i) to analyze the trend of passive IgG antibodies in the newborn by means of five serological tests for the diagnosis and follow-up of congenital Trypanosoma cruzi infection, (ii) to assess the utility of these techniques for diagnosing a congenital transmission, and (iii) to propose a strategy for a prompt, efficient and cost-effective diagnosis of T...
February 15, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28198351/therapeutic-drug-monitoring-guided-raltegravir-dosing-for-prevention-of-vertical-transmission-in-a-premature-neonate-born-to-a-woman-living-with-perinatally-acquired-hiv
#8
Denise Kreutzwiser, Nancy Sheehan, Natalie Dayneka, Benoît Lemire, Alison Wong, Lindy Samson, Jason Brophy
We report a case of therapeutic drug monitoring guided raltegravir use for the prevention of vertical HIV transmission in a premature neonate born to a woman living with perinatally acquired HIV and documented resistance to multiple HIV drugs. Maternal viral load was above 1,000 copies/mL at delivery. This case demonstrates delayed raltegravir elimination in a neonate born at 33 weeks gestational age and a need for less frequent raltegravir dosing than is used in older infants and children.
February 15, 2017: Antiviral Therapy
https://www.readbyqxmd.com/read/28197858/mapping-biological-transmission-an-empirical-dynamical-and-evolutionary-approach
#9
Francesca Merlin, Livio Riboli-Sasco
The current debate over extending inheritance and its evolutionary impact has focused on adding new categories of non-genetic factors to the classical transmission of DNA, and on trying to redefine inheritance. Transmitted factors have been mainly characterized by their directions of transmission (vertical, horizontal, or both) and the way they store variations. In this paper, we leave aside the issue of defining inheritance. We rather try to build an evolutionary conceptual framework that allows for tracing most, if not all forms of transmission and makes sense of their different tempos and modes...
February 14, 2017: Acta Biotheoretica
https://www.readbyqxmd.com/read/28192652/reversible-li-ion-conversion-reaction-for-a-tixge-alloy-in-a-ti-ge-multilayer
#10
Xiao Chen, Timothy T Fister, Jennifer L Esbenshade, Bing Shi, Xianyi Hu, Jinsong Wu, Andrew A Gewirth, Michael J Bedzyk, Paul Fenter
Group IV inter-metallics electrochemically alloy with Li with stoichiometries as high as Li4.4M (M=Si, Ge, Sn or Pb). This provides the second highest known specific capacity (after pure lithium metal) for lithium ion batteries, but the dramatic volume change during cycling greatly limits their use as anodes in Li-ion batteries. We describe an approach to overcome this limitation by constructing electrodes using a Ge/Ti multilayer architecture. In operando X-ray reflectivity and ex situ transmission electron microscopy are used to characterize the hetero-layer structure at various lithium stoichiometries along a lithiation/delithiation cycle...
February 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28192144/maternal-house-dust-mite-exposure-during-pregnancy-enhances-severity-of-hdm-induced-asthma-in-murine-offspring
#11
Phoebe K Richgels, Amnah Yamani, Claire A Chougnet, Ian P Lewkowich
BACKGROUND: Atopic status of the mother and maternal exposure to environmental factors is associated with increased asthma risk. Moreover, animal models demonstrate that exposure to allergens in strongly sensitized mothers influences offspring asthma development, suggesting that in utero exposures can influence offspring asthma. However, it is unclear whether maternal exposure to common human allergens like house dust mite (HDM), in the absence of additional adjuvants, influences offspring asthma development...
February 9, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28188768/frequency-of-toxocara-spp-antibodies-in-umbilical-cords-of-newborns-attended-atthe-university-hospital-in-southern-brazil-and-factors-associated-with-infection
#12
Paula Costa Santos, Paula Lima Telmo, Lis Maurente Lehmann, Carolina Lorenzi, Carolina Hirsch, Gabriela Torres Mattos, Gabriel Baracy Klafke, Maria Elisabeth Aires Berne, Carla Vitola Gonçalves, Carlos James Scaini
Toxocariasis is a neglected and geographically widespread parasitic disease. The detection of specific antibodies associated with this disease is required to confirm its clinical diagnosis and to aid in prevention. Although helminth infection during pregnancy can promote foetal immune responses with long-term effects, specific information regarding the risk of Toxocara spp. infection to the human foetus during pregnancy is lacking.Therefore,the present study aimed to investigate the frequency of antibodies against Toxocara spp...
February 7, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28185665/-rapid-diagnosis-in-serology
#13
Isabel García-Bermejo, Fernando de Ory
Serological diagnosis of acute phase infections implies the detection of IgM specific response, an effective marker of primary infection, but with less clinical significance in reactivations or reinfections. The aim of this article is to provide an updated view of the rapid diagnosis in serology by detecting the IgM isotype and reviewing its applications and limitations. Point-of-care (PoC) tests are analyzed. PoC tests are used in geographical areas where traditional tests are not available, as well as in other circumstances where their use brings the diagnosis directly to the target population...
February 6, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28183434/multigenerational-cohorts-in-patients-with-asthma-and-allergy
#14
S Hasan Arshad, Wilfried Karmaus, Hongmei Zhang, John W Holloway
Recent observations that disease risk can be transmitted across generations without the need for direct exposure of the child to the index environmental insult has sparked interest in transgenerational inheritance. Epigenetics describes processes that modify gene expression without a change in the nucleotide sequence. Epigenetic processes can be induced in response to environmental exposures, can influence disease risk, and might explain these multigenerational effects. In experimental models a number of epigenetic mechanisms have been identified that could mediate vertical transmission of epigenetic inheritance...
February 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28181860/factors-associated-with-mother-to-child-transmission-of-hiv-despite-overall-low-transmission-rates-in-hiv-exposed-infants-in-rural-kenya
#15
Nicollate A Okoko, Kevin O Owuor, Jayne L Kulzer, George O Owino, Irene A Ogolla, Ronald W Wandera, Elizabeth A Bukusi, Craig R Cohen, Lisa L Abuogi
Despite the availability of efficacious prevention of mother-to-child transmission (PMTCT) interventions and improved access to preventive services in many developing countries, vertical HIV transmission persists. A matched case-control study of HIV-exposed infants between January and June 2012 was conducted at 20 clinics in Kenya. Cases were HIV-infected infants and controls were exposed, uninfected infants. Conditional logistic regression analysis was conducted to determine characteristics associated with HIV infection...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28177042/microbial-control-of-arthropod-borne-disease
#16
Miguel A Saldaña, Shivanand Hegde, Grant L Hughes
Arthropods harbor a diverse array of microbes that profoundly influence many aspects of host biology, including vector competence. Additionally, symbionts can be engineered to produce molecules that inhibit pathogens. Due to their intimate association with the host, microbes have developed strategies that facilitate their transmission, either horizontally or vertically, to conspecifics. These attributes make microbes attractive agents for applied strategies to control arthropod-borne disease. Here we discuss the recent advances in microbial control approaches to reduce the burden of pathogens such as Zika, Dengue and Chikungunya viruses, and Trypanosome and Plasmodium parasites...
February 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28168206/passive-immunoprophylaxis-for-the-protection-of-the-mother-and-her-baby-insights-from-in-vivo-models-of-antibody-transport
#17
Yanqun Xu, Iftekhar Mahmood, Lilin Zhong, Pei Zhang, Evi B Struble
Pregnant women are at high risk for infection by pathogens. Vertical transmission of infectious agents, such as Zika, hepatitis B, and cytomegalovirus during pregnancy, remains a public health problem, associated with dire outcomes for the neonate. Thus, a safe prophylactic and therapeutic approach for protecting the mother and the neonate from infections remains a high priority. Our work is focused on better understanding the safety and efficacy determinants of IgG antibody preparations when used during pregnancy to benefit the mother and her baby...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28167590/chikungunya-and-neonatal-immunity-fatal-vertically-transmitted-chikungunya-infection
#18
Tracy Evans-Gilbert
Chikungunya is a mosquito-borne infectious disease that has emerged as a global pathogen. The virus can pass vertically from mother to child especially during the perinatal period, with an intrapartum vertical transmission rate of 50%. Approximately half of the neonates infected with chikungunya present with severe symptoms and infrequently death. This report summarizes two severe cases of vertically transmitted neonatal chikungunya infection. One case was confirmed by real-time reverse transcription polymerase chain reaction and the other fulfilled clinical and epidemiological criteria...
February 6, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28166832/prevalence-genetic-identity-and-vertical-transmission-of-babesia-microti-in-three-naturally-infected-species-of-vole-microtus-spp-cricetidae
#19
Katarzyna Tołkacz, Małgorzata Bednarska, Mohammed Alsarraf, Dorota Dwużnik, Maciej Grzybek, Renata Welc-Falęciak, Jerzy M Behnke, Anna Bajer
BACKGROUND: Vertical transmission is one of the transmission routes for Babesia microti, the causative agent of the zoonotic disease, babesiosis. Congenital Babesia invasions have been recorded in laboratory mice, dogs and humans. The aim of our study was to determine if vertical transmission of B. microti occurs in naturally-infected reservoir hosts of the genus Microtus. METHODS: We sampled 124 common voles, Microtus arvalis; 76 root voles, M. oeconomus and 17 field voles, M...
February 6, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28165175/possible-non-sexual-modes-of-transmission-of-human-papilloma-virus
#20
REVIEW
Sasidharanpillai Sabeena, Parvati Bhat, Veena Kamath, Govindakarnavar Arunkumar
AIM: There is strong evidence to suggest vertical and horizontal modes of transmission of human papilloma virus (HPV), an established etiologic agent of cervical cancer. Infants, children, and adults can acquire both high-risk and low-risk infections by birth or by close contact even though HPV is mainly transmitted sexually. A thorough review of the literature was performed to assess the possible non-sexual modes of transmission of HPV. METHODS: An electronic search of databases for review articles, cross-sectional studies, cohort studies, and case reports on non-sexual modes of transmission among sexually unexposed women and children was carried out using search terms such as "human papilloma virus, HPV, transmission, horizontal transmission, vertical transmission, and fomites"...
February 6, 2017: Journal of Obstetrics and Gynaecology Research
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