Assessing the sensitivity and specificity of First Response HIV-1-2 test kit with whole blood and serum samples: a cross-sectional study

The increase in HIV infection and drug-resistant strains is an important public health concern, especially in resource-limited settings. However, the identification of factors related to the propagation of infectious diseases represents a crucial target offering an opportunity to reduce health care costs as well as deepening the focus on preventing infection in high-risk groups. In this study, we investigate the factors related to drug resistance among HIV-infected pregnant women in Luanda, the capital city of Angola. This was a part of a cross-sectional study conducted with 42 HIV-positive pregnant women. A blood sample was collected, and HIV-1 genotyping was carried out using an in-house method. Multivariate analyses were performed to determine the interaction between sociodemographic characteristics and drug resistance. HIV drug resistance was detected in 44.1% of the studied population. High probabilities of drug resistance were observed for HIV-infected pregnant women living in rural areas (AOR: 2.73; 95% CI: 0.50–14.9) with high educational level (AOR: 6.27; 95% CI: 0.77–51.2) and comorbidities (AOR: 5.47; 95% CI: 0.28–106) and infected with a HIV-1 non-B subtype other than subtype C (AOR: 1.60; 95% CI: 0.25–10.3). The present study reports high HIV drug resistance. Furthermore, older-age, rural areas, high educational levels, unemployed status, having comorbidities, and HIV-1 subtypes were factors related to drug resistance. These factors impact on drug susceptibility and need to be urgently addressed in order to promote health education campaigns able to prevent the spread of drug-resistant HIV strains in Angola.

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Serum Concentrations of Selected Organochlorines in Pregnant Women and Associations with Pregnancy Outcomes. A Cross-Sectional Study from Two Rural Settings in Cambodia

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph17207652 ◽

2020 ◽

Vol 17 (20) ◽

pp. 7652

Author(s):

Margit Steinholt ◽

Shanshan Xu ◽

Sam Ol Ha ◽

Duong Trong Phi ◽

Maria Lisa Odland ◽

...

Keyword(s):

Polychlorinated Biphenyls ◽

Pregnant Women ◽

Gestational Age ◽

Low Income ◽

Cross Sectional Study ◽

Maternal Serum ◽

Sectional Study ◽

Serum Samples ◽

Cross Sectional ◽

Rural Settings

We conducted a cross-sectional study among 194 pregnant women from two low-income settings in Cambodia. The inclusion period lasted from October 2015 through December 2017. Maternal serum samples were analyzed for persistent organic pollutants (POPs). The aim was to study potential effects on birth outcomes. We found low levels of polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCP), except for heptachlors, β-hexachlorocyclohexane (HCH), heptachlor epoxide, and p,p’-DDE. There were few differences between the two study locations. However, the women from the poorest areas had significantly higher concentrations of p,p’-DDE (p < 0.001) and hexachlorobenzene (HCB) (p = 0.002). The maternal factors associated with exposure were parity, age, residential area, and educational level. Despite low maternal levels of polychlorinated biphenyls, we found significant negative associations between the PCB congeners 99 (95% CI: −2.51 to −0.07), 138 (95% CI: −1.28 to −0.32), and 153 (95% CI: −1.06 to −0.05) and gestational age. Further, there were significant negative associations between gestational age, birth length, and maternal levels of o,p’-DDE. Moreover, o,p’-DDD had positive associations with birth weight, and both p,p’-DDD and o,p’-DDE were positively associated with the baby’s ponderal index. The poorest population had higher exposure and less favorable outcomes.

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Maternal Pregnancy Associated Plasma Protein-A Levels in Late First Trimester as a Predictor of Miscarriage- A Cross-sectional Study

JOURNAL FOR CLINICAL AND DIAGNOSTIC RESEARCH ◽

10.7860/jcdr/2021/50626.15444 ◽

2021 ◽

Author(s):

Nivedita Sinha ◽

Alpana Singh ◽

BD Banerjee ◽

Rachna Agarwal ◽

Himsweta Srivastva

Keyword(s):

Logistic Regression ◽

Sensitivity And Specificity ◽

Plasma Protein ◽

Protein A ◽

Predictive Marker ◽

First Trimester ◽

Cross Sectional Study ◽

Sectional Study ◽

Cross Sectional ◽

Asymptomatic Women

Indroduction: Miscarriage is the most common complication of pregnancy. Defective implantation is one of the common causes of miscarriage. Pregnancy Associated Plasma Protein-A (PAPP-A) is secreted from syncytiotrophoblast and it enables trophoblast invasion. Few studies have shown association of PAPP-A with miscarriage. However, there is limited data available to establish the role of PAPP-A as a predictive marker of miscarriage, especially in Indian population. Aim: To determine the potential of maternal PAPP-A level estimation in asymptomatic women in late first trimester (10-13 weeks) with viable foetus in predicting subsequent miscarriage. Materials and Methods: This was an observational, cross-sectional study conducted from November 2016 to April 2018 at University College of Medical Science and Guru Teg Bahadur Hospital, Delhi, India. Asymptomatic pregnant women (N=500) at 10-13 weeks of gestation were recruited from an antenatal clinic after confirmation of foetal viability. A 2 mL of blood sample was collected and serum PAPP-A level was measured. Independent t-test and Chi-square test was used to compare continuous data and Mann-Whitney U test was used to compare PAPP-A Multiple of Median (MOM). Logistic regression was used to estimate risk of miscarriage. Results: Out of 500 participants, 9 were lost to follow-up. From remaining N=491, 32 (6.5%) women had a miscarriage. PAPP-A levels were significantly decreased in miscarriage group compared to ongoing pregnancy group with median MOM 0.116 (0.080-0.17) and 1.25 (0.665-3.249) respectively (p-value <0.001). PAPP-A MOM value of ≤10th percentile sensitivity and specificity of detection of miscarriage was 81.25% and 94.98% and at ≤5th percentile sensitivity and specificity was 40.62% and 97.82%, respectively. Lower the percentile cut-off of serum PAPP-A value, higher was the specificity and positive predictive value for prediction of miscarriage. By applying logistic regression we found that if PAPP-A MOM decreases by 1 unit the chances of miscarriage increased by 1.2 times. By this model 63.2% of cases could be explained (Nagelkerke R Square=0.632). For prediction of pregnancies likely to miscarry, the area under Receiver Operator Characteristic (ROC) curve (95% CI) was 0.969 (0.955-0.983). Conclusion: Low serum PAPP-A levels from asymptomatic women in late 1st trimester is a good predictive marker of miscarriage.

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A cross sectional study of leptospirosis and fetal death in Yucatan, Mexico

Colombia Medica ◽

10.25100/cm.v47i1.1975 ◽

2016 ◽

pp. 11-14 ◽

Cited By ~ 2

Author(s):

María Fidelia Cárdenas Marrufo ◽

Ignacio Vado Solis ◽

Gaspar Fernando Peniche Lara ◽

Carlos Perez Osorio ◽

José Correa Segura

Keyword(s):

Spontaneous Abortion ◽

Low Income ◽

Fetal Death ◽

Indirect Elisa ◽

First Trimester ◽

Cross Sectional Study ◽

Sectional Study ◽

Serum Samples ◽

Recent Infection ◽

Cross Sectional

Introduction: Leptospirosis is a zoonotic disease affecting mainly to low income human population. Acute leptospiral infection during pregnancy has been associated with spontaneous abortion and fetal death during the first trimester and the abortion may occur as consequence of systemic failure. Objective: To estimate the frequency of Leptospira interrogans infection in women with spontaneous abortion in the state of Yucatan, Mexico. Methods: A cross sectional study on women with spontaneous abortion was conducted. Serum samples were tested for Leptospirosis by the microaglutination test, to estimate the frequency of the infecting serovar. The indirect ELISA IgM was used to detect recent infection by L. interrogans. DNA was extracted from paraffin-embedded tissue of placenta for PCR detection of L. interrogans. Results: Overall frequency of infection with L. interrogans in the 81 women with abortion was 13.6%. Five of the 12 serovars evaluated were found and included. Two of the 11 women with abortion and positive to microaglutination test were also positive to the ELISA IgM test. None samples were positive for PCR Leptospira diagnosis. Conclusion: two women could be associated with spontaneous abortion due to leptospirosis, because they showed antibodies against L. interrogans in the microaglutination test and ELISA IgM assays. Differences between regions were found with respect to the prevalences of lesptospirosis.

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Epstein-Barr Virus Load in Whole Blood Correlates With HIV Surrogate Markers and Lymphoma: A French National Cross-Sectional Study

JAIDS Journal of Acquired Immune Deficiency Syndromes ◽

10.1097/qai.0b013e31819a22ec ◽

2009 ◽

Vol 50 (4) ◽

pp. 427-429 ◽

Cited By ~ 8

Author(s):

Corinne Amiel ◽

Jérôme LeGoff ◽

François Xavier Lescure ◽

Marianne Coste-Burel ◽

Claire Deback ◽

...

Keyword(s):

Whole Blood ◽

Epstein Barr Virus ◽

Cross Sectional Study ◽

Surrogate Markers ◽

Sectional Study ◽

Cross Sectional ◽

Virus Load ◽

Barr Virus ◽

Epstein Barr

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High viremia and Poor Immunity are Potential Surrogates of Anti-toxoplasmic Immunoglobulin G Quantification among HIV-Infected Individuals: A Cross-sectional Study in Yaoundé, Cameroon

10.21203/rs.2.21840/v1 ◽

2020 ◽

Author(s):

Aude Christelle Ka'e ◽

Samuel Martin Sosso ◽

Joseph Fokam ◽

Rachel Kamgaing Simo ◽

Sara Riwom Essama ◽

...

Keyword(s):

Opportunistic Infection ◽

Immune Status ◽

Cross Sectional Study ◽

People Living With Hiv ◽

Sectional Study ◽

Cross Sectional ◽

Reference Centre ◽

Resource Limited ◽

Common Opportunistic Infection ◽

Hiv 1

Abstract Background: Toxoplasmosis remains a neglected common opportunistic infection in immunocompromised individuals, who are mainly people living with HIV (PLWHIV) in whom reactivation of toxoplasmosis may occur with advanced HIV conditions in resource-limited settings (RLS). Our objective was to evaluate the correlation between the anti-toxoplasmic IgG (Tg-IgG) concentration and the immuno-virological status of PLWHIV.Methods : A prospective and cross-sectional study was conducted among PLWHIV aged>18 years from February to November 2018 at the Chantal BIYA international Reference Centre. Blood samples were collected from eligible consenting PLWHIV; Tg-IgG level was assessed by quantitative ELISA, CD4-T lymphocytes counts were measured by flow cytometry and HIV-1 plasma viral load (PVL) measurement by real-time-PCR. Data were analysed using Excel and Graph Pad softwares; with p<0.05 considered statistically significant.Results : A total of 100 PLWHIV were enrolled: 56% seropositive for IgG anti- Toxoplasma gondii, 33% seronegative and 11% indeterminate results. According to viremia, 100% (19/19) of those with PVL>1000 copies/mL were seropositive to Tg-IgG versus 52.85% (37/70) of those with PVL<1000 copies/mL (median [IQR] IgG concentration 152.78 [139.24-444.43] versus 34.44 [13.04-36.47] IU/mL, respectively); p<0.0001. According to CD4, 100% (11/11) of those with T-CD4<200 cells/µL were seropositive to Tg-IgG versus 57.69% (45/78) of those with T-CD4>200 cells/µL (median IgG [IQR] 432.92 [145.06-450.47] versus 35.01 [15.01-38.01] IU/mL, respectively); p<0.0001. Interestingly, there were moderate-positive and strong-negative correlations respectively with HIV-1 PVL (r = 0.54; p<0.0001) and T-CD4 (r = -0.70; p<0.0001) as compared to Tg-IgG concentration. After adjusting for age, gender, immune status and PVL in logistic regression, only poor immune status (T-CD4<200 cells/µL) was independently associated to Tg-IgG seropositivity (p=0.0004).Conclusion : In a typical RLS like Cameroon, about half of PLWHIV might be seropositive to Tg-IgG. Of relevance, decreasing immunity appears with risk of increasing IgG anti- T gondii concentration, which suggests a relapse of toxoplasmosis. Thus, in the context of immunodeficiency, routine quantification of Tg-IgG would alleviate the programmatic burden of this opportunistic infection in RLS with generalized HIV epidemics.

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Association between lipodystrophy and length of exposure to ARTs in adult HIV-1 infected patients in Montreal

BMC Infectious Diseases ◽

10.1186/s12879-019-4446-9 ◽

2019 ◽

Vol 19 (1) ◽

Cited By ~ 2

Author(s):

Ahmad Alikhani ◽

Helene Morin ◽

Stephanie Matte ◽

Pouriya Alikhani ◽

Cécile Tremblay ◽

...

Keyword(s):

Cross Sectional Study ◽

Continuous Variable ◽

Antiretroviral Drugs ◽

Cumulative Exposure ◽

Sectional Study ◽

Cross Sectional ◽

Centre Hospitalier Universitaire ◽

Antiretroviral Drug ◽

Trunk Limb ◽

Hiv 1

Abstract Background The aim of this study was to establish the prevalence of lipodystrophy and its association to cumulative exposure to antiretroviral drugs. Method We conducted a cross sectional study in all HIV- infected patients attending the HIV clinic in the Centre hospitalier universitaire de Montréal (CHUM) with DEXA scan. Lipodystrophy was defined as a trunk/limb fat ratio ≥ 1.5. Association between cumulative exposure to antiretroviral (measured in years of use) with trunk/limb fat ratio (coded as a continuous variable) was assessed using univariate and multivariate linear regression for each antiretroviral drug with at least 40 exposed patients. Results One hundred sixty-six patients were included. Seventy-five percent were male, median age was 56 years, 67% were Caucasian. Overall, prevalence of lipodystrophy was 47%, with a mean trunk/limb fat ratio of 1.87, SD = 1.03, min = 0.6 and max = 5.87. Each 10-year increase in age and HIV infection duration was associated with an average increase of 0.24 and 0.34 for the trunk/limb fat ratio respectively. (p = 0.003, p = 0.002, respectively) Patients classified as lipodystrophic were more likely to be diabetic (50 vs. 28%, p = 0.07) and to have dyslipidemia (47 vs. 19%, p = 0.01). According to viral load at DEXA test, each one log increase was associated with less probability (0.7) of lipodystrophy. (p = 0.01) Among ARV drugs tested, there was an association between years of use of d4T, ritonavir and raltegravir and higher trunk/limb fat ratio (indicating more lipodystrophy) (p < 0.05). Conclusion Lipodystrophy is very common in HIV infected patients and is correlated with duration of some new antiretroviral drugs.

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