Serological evidence of vertical transmission of JC and BK polyomaviruses in humans

Vertical transmission of JC virus and BK virus has been investigated by few authors, with conflicting results. We performed a combined serological and genomic study of 19 unselected pregnant women and their newborns. Blood and urine samples were collected during each gestational trimester from the pregnant women. Umbilical cord blood, peripheral blood, urine and nasopharyngeal secretion samples were taken from newborns at delivery and after 1 week and 1 month of life. Polyomavirus DNA was detected by nested PCR. Polyomavirus IgG-, IgM- and IgA-specific antibodies were measured in maternal and newborn serum samples using a virus-like-particle-based ELISA method. BKV and JCV DNA were detected in urine from 4 (21 %) and 5 (26 %) women, respectively. BKV and JCV seroprevalences in the pregnant women were 84 % and 42 %, respectively. Using a rise in the IgG level or the transient appearance of an IgA or IgM response as evidence of infection in the newborn, we detected BKV and JCV infections in four (21 %) and three (16 %) newborns, respectively. Three infants had serological evidence of infection with both BKV and JCV. In two of the four possible BKV-infected newborns, the mothers seroconverted during pregnancy, while another mother was viruric and IgA seropositive. The mother of one of the three possible JCV-infected newborns was viruric and IgA seropositive; another mother was viruric. These results suggest JC virus and BK virus can be transmitted from mother to newborn during pregnancy or soon after birth.

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Screening for hepatitis b and c viral infections among pregnant women attending the Bolan Medical Complex Hospital and Sandeman Provincial Civil Hospital Quetta, Pakistan.

The Professional Medical Journal ◽

10.29309/tpmj/2020.27.08.3129 ◽

2020 ◽

Vol 27 (07) ◽

pp. 1328-1334

Author(s):

Zunera Tanveer ◽

Irshad Ahmad ◽

Muhammad Shahid Javed ◽

Shoaib Ahmad Malik ◽

Nargis Haider Kakar ◽

...

Keyword(s):

Hepatitis B ◽

Pregnant Women ◽

Vertical Transmission ◽

Viral Infections ◽

Cross Sectional Study ◽

Serum Samples ◽

Cross Sectional ◽

Civil Hospital ◽

Infection Risk Factors ◽

One Year

Infectious diseases caused by hepatitis B virus (HBV) and hepatitis C virus (HCV) are a worldwide burden to health, especially in developing countries. Pakistan has one of the highest levels of HBV and HCV infection, causing a severe health problem with significant challenges and priorities. To prevent vertical transmission of infection, regular screening of pregnant women for HBV and HCV is vital. Objectives: The objective of this study was to evaluate the prevalence of HBV and HCV virus in pregnant women having prenatal care. Study Design: Cross-Sectional study. Setting: Bolan Medical Complex Hospital and Sandeman Provincial Civil Hospital Quetta. Period: August 2017 to July 2018. Material & Methods: Blood serum samples were screened for HBV surface antigen (HBsAg) and for anti-HCV using immunochromatography methods. Results: A total of 12,209 pregnant women were tested over a period of one year (August 2017 to July 2018). The overall HBV infections frequency was 1.3% (95% CI 1.1-1.4%) and for HCV infections it was 0.6% (95% CI 0.6-0.7%). Whilst there was only small month-wise variation in the occurrence of HBV and HCV infections, HBV prevalence was highest in May (1.7%) and HCV prevalence was highest in August and December (0.8%). Conclusions: Screening of all pregnant women for HBV and HCV is essential for reducing and eliminating vertical transmission of infection. Risk factors for infection need to be avoided and managed properly.

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Immunoglobulin G, A, and M Responses to BK Virus in Renal Transplantation

Clinical and Vaccine Immunology ◽

10.1128/cvi.00114-06 ◽

2006 ◽

Vol 13 (9) ◽

pp. 1057-1063 ◽

Cited By ~ 40

Author(s):

Parmjeet S. Randhawa ◽

Gaurav Gupta ◽

Abhay Vats ◽

Ron Shapiro ◽

Raphael P. Viscidi

Keyword(s):

Viral Replication ◽

Optical Density ◽

Immunoglobulin G ◽

Jc Virus ◽

Bk Virus ◽

Enzyme Linked Immunosorbent Assay ◽

Kidney Transplant Recipients ◽

Serum Samples ◽

Igm Antibodies ◽

Active Viral Replication

ABSTRACT Immunoglobulin G (IgG), IgA, and IgM antibodies were measured in serum samples from 71 organ donors, 81 kidney transplant recipients at transplantation, and 67 patients during the posttransplant period by using a virus-like particle-based enzyme-linked immunosorbent assay (ELISA). BK virus (BKV) and JC virus DNA were detected in urine and plasma by real-time PCR. IgG antibodies to BKV were demonstrated in the majority (80.3 to 100%) of patients irrespective of clinical category, but titers were highest in patients with active viral replication. IgA antibodies were present with greater frequency (72.7 to 81.3% versus 0 to 23.6%; P < 0.001) and higher titer (mean optical density, 0.11 to 0.15 versus 0.05 to 0.08; P < 0.001) in patients who were BKV DNA positive than those who were BKV DNA negative. IgM antibodies showed a similar pattern of reactivity but lower frequency in the setting of active viral replication (9.1 to 43.7% versus 0 to 1.4%; P < 0.001). A rise in IgG level of >0.577 optical density (OD) units or a rise in IgA or IgM level of >0.041 OD units was strongly associated with active viral replication. Urine viral load showed a positive correlation with IgM titer (r = 0.22) but a negative correlation with IgG titer (r = −0.28) and IgA titer (r = −0.1). Chronic dialysis patients typically did not have serologic or virologic evidence of active BKV infection. Anti-BKV titers did not rise in patients with JC viruria. In conclusion, measurement of anti-BKV antibody titer and class response can be used to detect the onset of viral replication. ELISAs can be quite specific despite considerable sequence homology between BK virus and JC virus.

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Age-Specific Seroprevalence of Merkel Cell Polyomavirus, BK Virus, and JC Virus

Clinical and Vaccine Immunology ◽

10.1128/cvi.05175-11 ◽

2011 ◽

Vol 18 (10) ◽

pp. 1737-1743 ◽

Cited By ~ 109

Author(s):

Raphael P. Viscidi ◽

Dana E. Rollison ◽

Vernon K. Sondak ◽

Barbara Silver ◽

Jane L. Messina ◽

...

Keyword(s):

Competitive Inhibition ◽

Jc Virus ◽

Expression System ◽

Cell Cancer ◽

Bk Virus ◽

Merkel Cell Polyomavirus ◽

Enzyme Linked Immunosorbent Assay ◽

Human Populations ◽

Merkel Cell ◽

Serum Samples

ABSTRACTWe produced capsids of Merkel cell polyomavirus (MCPyV) in a baculovirus expression system and developed a virus-like particle (VLP) enzyme-linked immunosorbent assay (ELISA). To determine age-specific seroprevalence, serum samples were collected from 947 individuals attending hospital outpatient clinics and ranging in age from 1 to 93 years. To evaluate the association between exposure to MCPyV and Merkel cell cancer (MCC), plasma samples were obtained from 33 MCC patients and 37 controls. MCPyV seroprevalence was 45% in children under 10 years of age, increased to 60% in the next decade of life, and peaked at 81% among those 60 to 69 years of age. Levels of MCPyV capsid antibodies were positively correlated with age (P= 0.007). Virus specificity of MCPyV seroreactivity was supported by competitive inhibition of reactivity by MCPyV VLPs and not by BK polyomavirus (BKPyV) VLPs. MCPyV seroprevalence was greater among MCC patients (91%) than controls (68%; age-adjustedPvalue, 0.32); the mean level of MCPyV antibodies was also greater (P= 0.04). The age-specific seroprevalence of MCPyV shares with previously known polyomaviruses, BKPyV and JC polyomavirus (JCPyV), evidence of widespread exposure in human populations beginning early in life. MCPyV age-specific seroprevalence also has unique features. Seroprevalence among children is higher than that of JCPyV but lower than that of BKPyV. Among older adults, MCPyV seroprevalence remains high, while that of BKPyV declines and that of JCPyV continues to rise. In agreement with results from other studies, we found an association between MCPyV seropositivity and MCC, and higher levels of serum MCPyV capsid antibodies in MCC patients than in controls.

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Impact of Novel Coronavirus (COVID-19) on Pregnant Women: A Review

Coronaviruses ◽

10.2174/2666796701999201116123457 ◽

2020 ◽

Vol 01 ◽

Author(s):

Saima Habeeb ◽

Manju Chugani

Keyword(s):

Pregnant Women ◽

Vertical Transmission ◽

Respiratory Infections ◽

Age Groups ◽

Well Being ◽

Fetal Outcome ◽

Global Public Health ◽

Coronavirus Infection ◽

Novel Coronavirus ◽

The Impact

: The novel coronavirus infection (COVID‐19) is a global public health emergency.Since its outbreak in Wuhan, China in December 2019, the infection has spread at an alarming rate across the globe and humans have been locked down to their countries, cities and homes. As of now, the virus has affected over 20million people globally and has inflicted over 7 lac deaths. Nevertheless, the recovery rate is improving with each passing day and over 14 million people have recuperated so far. The statistics indicate that nobody is immune to the disease as the virus continues to spread among all age groups; newborns to the elders, and all compartmentsincluding pregnant women. However, pregnant women may be more susceptible to this infection as they are, in general, highly vulnerable to respiratory infections. There is no evidence for vertical transmission of the COVID-19 virus among pregnant women, but an increased prevalence of preterm deliveries. Besides this, the COVID-19 may alter immune response at the maternal-fetal interface and affect the well-being of mothers as well as infants. Unfortunately, there is limited evidence available in the open literature regarding coronavirus infection during pregnancy and it now appears that certain pregnant women have infected during the present 2019-nCoV pandemic. In this short communication, we study the impact of the COVID-19 infection on vertical transmission and fetal outcome among pregnant women.

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Low Maternal Immunoglobulin G Avidity and Single Parity as Adverse Implications of Human Cytomegalovirus Vertical Transmission in Pregnant Women with Immunoglobulin M Positivity

Viruses ◽

10.3390/v13050866 ◽

2021 ◽

Vol 13 (5) ◽

pp. 866

Author(s):

Masatoki Kaneko ◽

Junsuke Muraoka ◽

Kazumi Kusumoto ◽

Toshio Minematsu

Keyword(s):

Risk Factors ◽

Pregnant Women ◽

Vertical Transmission ◽

Human Cytomegalovirus ◽

Multiple Logistic Regression Analysis ◽

Clinical Signs ◽

Immunoglobulin M ◽

Igg Antibody ◽

Neurological Sequelae ◽

Previous Pregnancy

Human cytomegalovirus (CMV) is the leading cause of neurological sequelae in infants. Understanding the risk factors of primary CMV infection is crucial in establishing preventive strategies. Thus, we conducted a retrospective cohort study to identify risk factors of vertical transmission among pregnant women with immunoglobulin (Ig) M positivity. The study included 456 pregnant women with IgM positivity. Information on age, parity, occupation, clinical signs, IgM levels, and IgG avidity index (AI) was collected. The women were divided into infected and non-infected groups. The two groups showed significant differences in IgM level, IgG AI, number of women with low IgG AI, clinical signs, and number of pregnant women with single parity. In the multiple logistic regression analysis, pregnant women with single parity and low IgG AI were independent predictors. Among 40 women who tested negative for IgG antibody in their previous pregnancy, 20 showed low IgG AI in their current pregnancy. Among the 20 women, 4 had vertical transmission. These results provide better understanding of the risk factors of vertical transmission in pregnant women with IgM positivity.

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Discriminating between JCPyV and BKPyV in Urinary Virome Data Sets

Viruses ◽

10.3390/v13061041 ◽

2021 ◽

Vol 13 (6) ◽

pp. 1041

Author(s):

Rita Mormando ◽

Alan J. Wolfe ◽

Catherine Putonti

Keyword(s):

Jc Virus ◽

Sequence Similarity ◽

Bk Virus ◽

Data Sets ◽

Metagenomic Sequencing ◽

Significant Sequence Similarity ◽

Sequence Identity ◽

Shotgun Metagenomic Sequencing ◽

Urinary Microbiome ◽

Six Genes

Polyomaviruses are abundant in the human body. The polyomaviruses JC virus (JCPyV) and BK virus (BKPyV) are common viruses in the human urinary tract. Prior studies have estimated that JCPyV infects between 20 and 80% of adults and that BKPyV infects between 65 and 90% of individuals by age 10. However, these two viruses encode for the same six genes and share 75% nucleotide sequence identity across their genomes. While prior urinary virome studies have repeatedly reported the presence of JCPyV, we were interested in seeing how JCPyV prevalence compares to BKPyV. We retrieved all publicly available shotgun metagenomic sequencing reads from urinary microbiome and virome studies (n = 165). While one third of the data sets produced hits to JCPyV, upon further investigation were we able to determine that the majority of these were in fact BKPyV. This distinction was made by specifically mining for JCPyV and BKPyV and considering uniform coverage across the genome. This approach provides confidence in taxon calls, even between closely related viruses with significant sequence similarity.

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Role of antenatal plasma cytomegalovirus DNA levels on pregnancy outcome and HIV-1 vertical transmission among mothers in the University of Zimbabwe birth cohort study (UZBCS)

Virology Journal ◽

10.1186/s12985-021-01494-3 ◽

2021 ◽

Vol 18 (1) ◽

Author(s):

Kerina Duri ◽

◽

Simbarashe Chimhuya ◽

Exnevia Gomo ◽

Privilege Tendai Munjoma ◽

...

Keyword(s):

Pregnant Women ◽

Vertical Transmission ◽

Pregnancy Outcomes ◽

Preterm Births ◽

Multivariate Logistic Regression Model ◽

Birth Cohort Study ◽

Childhood Disability ◽

Hiv 1 ◽

Cmv Dnaemia ◽

Rna Levels

Introduction Despite being a leading infectious cause of childhood disability globally, testing for cytomegalovirus (CMV) infections in pregnancy is generally not done in Sub-Sahara Africa (SSA), where breastfeeding practice is almost universal. Whilst CMV and human immunodeficiency virus (HIV) are both endemic in SSA, the relationship between antenatal plasma CMV-DNA, HIV-1-RNA levels and HIV-1-mother to child transmission (MTCT) including pregnancy outcomes remains poorly described. Methods Pregnant women at least 20 weeks’ gestational age at enrolment were recruited from relatively poor high-density suburbs in Harare, Zimbabwe. Mother-infant dyads were followed up until 6 months postpartum. In a case–control study design, we tested antenatal plasma CMV-DNA levels in all 11 HIV-1 transmitting mothers, as well as randomly selected HIV-infected but non-transmitting mothers and HIV-uninfected controls. CMV-DNA was detected and quantified using polymerase chain reaction (PCR) technique. Antenatal plasma HIV-1-RNA load was quantified by reverse transcriptase PCR. Infants’ HIV-1 infection was detected using qualitative proviral DNA-PCR. Predictive value of antenatal plasma CMV-DNAemia (CMV-DNA of > 50 copies/mL) for HIV-1-MTCT was analyzed in univariate and multivariate regression analyses. Associations of CMV-DNAemia with HIV-1-RNA levels and pregnancy outcomes were also explored. Results CMV-DNAemia data were available for 11 HIV-1 transmitting mothers, 120 HIV-infected but non-transmitting controls and 46 HIV-uninfected mothers. In a multivariate logistic regression model, we found a significant association between CMV-DNAemia of > 50 copies/mL and HIV-1 vertical transmission (p = 0.035). There was no difference in frequencies of detectable CMV-DNAemia between HIV-infected and -uninfected pregnant women (p = 0.841). However, CMV-DNA levels were higher in immunosuppressed HIV-infected pregnant women, CD4 < 200 cells/µL (p = 0.018). Non-significant associations of more preterm births (< 37 weeks, p = 0.063), and generally lower birth weights (< 2500 g, p = 0.450) were observed in infants born of HIV-infected mothers with CMV-DNAemia. Furthermore, in a multivariate analysis of HIV-infected but non-transmitting mothers, CMV-DNAemia of > 50 copies/mL correlated significantly with antenatal plasma HIV-1-RNA load (p = 0.002). Conclusion Antenatal plasma CMV-DNA of > 50 copies/mL may be an independent risk factor for HIV-1-MTCT and higher plasma HIV-1-RNA load, raising the possibility that controlling antenatal CMV-DNAemia might improve infant health outcomes. Further studies with larger sample sizes are warranted to confirm our findings.

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Dehydroepiandrosterone (DHEA) Serum Levels Indicate Cerebrospinal Fluid Levels of DHEA and Estradiol (E2) in Women at Term Pregnancy

Reproductive Sciences ◽

10.1007/s43032-021-00541-2 ◽

2021 ◽

Author(s):

Pardes Habib ◽

Joseph Neulen ◽

Shahin Habib ◽

Benjamin Rösing

Keyword(s):

Pregnant Women ◽

Strong Correlation ◽

Serum Levels ◽

Neuroactive Steroids ◽

Term Pregnancy ◽

Serum Samples ◽

Functional Changes ◽

The Central Nervous System ◽

Csf Levels ◽

Fluid Levels

AbstractNeuroactive steroids such as dehydroepiandrosterone (DHEA), estradiol (E2), and progesterone (P4) are associated with structural and functional changes in the central nervous system (CNS). Measurement of steroid levels in the CNS compartments is restricted in accessibility. Consequently, there is only limited human data on the distributional equilibrium for steroid levels between peripheral and central compartments. While some neuroactive steroids including DHEA and E2 have been reported to convey excitatory and proconvulsant properties, the opposite was demonstrated for P4. We aimed to elucidate the correlation between peripheral and central DHEA, E2, and P4 levels in women at term pregnancy. CSF and serum samples of 27 healthy pregnant women (22–39 years) at term pregnancy were collected simultaneously under combined spinal and epidural anesthesia and used for DHEA ELISA and E2, and P4 ECLIA. All three neuroactive steroids were detected at markedly lower levels in CSF compared to their corresponding serum concentrations (decrease, mean ± SD, 97.66 ± 0.83%). We found a strong correlation for DHEA between its serum and the corresponding CSF levels (r = 0.65, p = 0.003). Serum and CSF levels of E2 (r = 0.31, p = 0.12) appeared not to correlate in the investigated cohort. DHEA serum concentration correlated significantly with E2 (r = 0.58, p = 0.0016) in CSF. In addition, a strong correlation was found between DHEA and E2, both measured in CSF (r = 0.65, p = 0.0002). Peripheral DHEA levels might serve as an indicator for central nervous levels of the neuroactive steroids DHEA and E2 in pregnant women.

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COVID-19: Uncertainties from Conception to Birth

Revista Brasileira de Ginecologia e Obstetrícia / RBGO Gynecology and Obstetrics ◽

10.1055/s-0040-1721856 ◽

2021 ◽

Vol 43 (01) ◽

pp. 054-060

Author(s):

Bruno Ramalho de Carvalho ◽

Karina de Sá Adami ◽

Walusa Assad Gonçalves-Ferri ◽

Marise Samama ◽

Rui Alberto Ferriani ◽

...

Keyword(s):

Pregnant Women ◽

Present Article ◽

Vertical Transmission ◽

Scientific Information ◽

Obstetric Outcomes ◽

Reproductive Events ◽

The Impact ◽

Initial Impressions ◽

Quality Evidence

AbstractScientific information on the impact of the new coronavirus (SARS-CoV-2) on the health of pregnant women, fetuses and newborns is considered of limited confidence, lacking good-quality evidence, and drawing biased conclusions. As a matter of fact, the initial impressions that the evolution of COVID-19 was no different between pregnant and non-pregnant women, and that SARS-CoV-2 was not vertically transmitted, are confronted by the documentation of worsening of the disease during pregnancy, poor obstetric outcomes, and the possibility of vertical transmission. The present article aims to compile the data available on the association of COVID-19 and reproductive events, from conception to birth.

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COVID-19 Infection during Pregnancy: Risk of Vertical Transmission, Fetal, and Neonatal Outcomes

Journal of Personalized Medicine ◽

10.3390/jpm11060483 ◽

2021 ◽

Vol 11 (6) ◽

pp. 483

Author(s):

Marwa Saadaoui ◽

Manoj Kumar ◽

Souhaila Al Khodor

Keyword(s):

Pregnant Women ◽

Vertical Transmission ◽

Current Knowledge ◽

Limited Data ◽

Pregnancy Risk ◽

Public Health Challenge ◽

Short And Long Term ◽

Critical Public Health ◽

The Impact

The COVID-19 pandemic is a worldwide, critical public health challenge and is considered one of the most communicable diseases that the world had faced so far. Response and symptoms associated with COVID-19 vary between the different cases recorded, but it is amply described that symptoms become more aggressive in subjects with a weaker immune system. This includes older subjects, patients with chronic diseases, patients with immunosuppression treatment, and pregnant women. Pregnant women are receiving more attention not only because of their altered physiological and immunological function but also for the potential risk of viral vertical transmission to the fetus or infant. However, very limited data about the impact of maternal infection during pregnancy, such as the possibility of vertical transmission in utero, during birth, or via breastfeeding, is available. Moreover, the impact of infection on the newborn in the short and long term remains poorly understood. Therefore, it is vital to collect and analyze data from pregnant women infected with COVID-19 to understand the viral pathophysiology during pregnancy and its effects on the offspring. In this article, we review the current knowledge about pre-and post-natal COVID-19 infection, and we discuss whether vertical transmission takes place in pregnant women infected with the virus and what are the current recommendations that pregnant women should follow in order to be protected from the virus.

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