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18 real negative results, null findings, and replication failures in Infectious and parasitic diseases · Negative / Null Result Report. Search the index →

WASTE indexes published research — it does not host or republish full papers. Each entry is a metadata record compiled from open scholarly databases; the abstract is shown in full only where the paper is openly licensed, otherwise a short excerpt under fair use. Classifications are automated and approximate.

Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Independent and combined effect of bilirubin and smoking on the progression of chronic kidney disease

Wang J, Wang B, Liang M et al. · 2018 · Clinical Epidemiology

Jiancheng Wang,1,* Binyan Wang,1,2,* Min Liang,1 Guobao Wang,1 Jianping Li,3 Yan Zhang,3 Yong Huo,3 Yimin Cui,4 Xiping Xu,1,5 Xianhui Qin1 1National Clinical Research Center for Kidney Disease, State Key Laboratory for Organ Failure Research, Renal Division, Nanfang Hospital, Southern Medical University, Guangzhou, 2Institute for Biomedicine, Anhui Medical University, Hefei, 3Department of Cardiology, 4Department of Pharmacy, Peking University First Hospital, Beijing, 5Beijing Advanced Innovation Center for Food Nutrition and Human Health, Key Laboratory of Functional Dairy, College of Food Sc

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Comparative field evaluation of kelambu traps, barrier screens and barrier screens with eaves for longitudinal surveillance of adult Anopheles mosquitoes in Sulawesi, Indonesia

Jenna R. Davidson, Isra Wahid, Rusdiyah Sudirman et al. · 2019 · Parasites & Vectors

Abstract Background Sampling methodologies for mosquitoes that are capable of transmitting vector-borne infectious diseases provide critical information on entomological endpoints. Reliable and meaningful field data is vital to the understanding of basic vector biology as well as disease transmission. Various traps take advantage of different vector behaviors and are inevitably subject to sampling biases. This study represents the first comparison of kelambu traps (KT) to barrier screens (BS), barrier screens with eaves (BSE) and indoor and outdoor human landing catches (HLCs). Methods Two tra

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

ASSOCIATION BETWEEN FAS/FASL EXPRESSION AND RHEUMATOLOGICAL MANIFESTATIONS IN PATIENTS INFECTED WITH HTLV-1

Aline Cecy Rocha de Lima, Wandrey Roberto dos Santos Brito, Luciana Cristina Coelho Pantoja Santos et al. · 2026 · Brazilian Journal of Infectious Diseases

Introduction: Fas and FasL are known modulators of cellular apoptosis in immunoregulation of the innate immune response, as well as in the elimination of defective cells, and may be associated with antiviral activity of HTLV-1 – infected cells. Understanding the immunological mechanisms involved in the progression of HTLV-1 – associated diseases may contribute to predicting the clinical prognosis of infected individuals. Objective: To evaluate mRNA expression of the apoptotic modulators FAS and FASL in patients infected with HTLV-1. Methods: A total of 54 HTLV-1 – infected individuals were eva

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Safety Evaluation of Topical Application of Nano-Liposomal Form of Amphotericin B (SinaAmpholeish) on Healthy Volunteers: Phase I Clinical Trial

Seyed Ebrahim ESKANDARI, Alireza FIROOZ, Mansour NASSIRI-KASHANI et al. · 2019 · Iranian Journal of Parasitology

Background: We aimed to evaluate the safety of SinaAmpholeish in a double-blind, randomized, phase 1 clinical trial in healthy human volunteers. Methods: The study was carried out in DermaLab of Center for Research and Training in Skin Diseases and Leprosy, Tehran University of Medical Sciences, Tehran, Iran in 2012. A topical Nano-liposomal formulation of 0.4% Amphotericin B was developed against Leishmania under trade name of SinaAmpholeish. In this randomized, double-blind, right-left, comparative, phase I clinical trial, in 2 steps; 7 and 20 healthy volunteers were recruited and applied Si

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Charlson Comorbidity Index Based On Hospital Episode Statistics Performs Adequately In Predicting Mortality, But Its Discriminative Ability Diminishes Over Time

Pylväläinen J, Talala K, Murtola T et al. · 2019 · Clinical Epidemiology

Juho Pylväläinen,1–3 Kirsi Talala,4 Teemu Murtola,5–7 Kimmo Taari,8 Jani Raitanen,1,9 Teuvo L Tammela,6 Anssi Auvinen1 1Tampere University, Faculty of Social Sciences (Health Sciences), Tampere, Finland; 2Helsinki University, Faculty of Medicine, Department of Diagnostics and Therapeutics, Helsinki, Finland; 3Helsinki University Central Hospital, Medical Imaging Center, Helsinki, Finland; 4Cancer Society of Finland, Finnish Cancer Registry, Mass Screening Registry, Helsinki, Finland; 5Tampere University, Faculty of Medicine and Health Technology, Prostate Cancer Research

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Seroprevalence and factors associated with SARS-CoV-2 infection among healthcare workers: cross-sectional study

Watheq Thabet Taher, Amen A. Bawazir, Talal A. Sallam et al. · 2023 · BMC Infectious Diseases

Abstract Background Healthcare workers (HCWs) are at a higher risk of contracting COVID-19 due to their close contact with infected patients. However, the true burden of COVID-19 among HCWs in Yemen is unknown due to the inadequate availability of healthcare and the subclinical nature of the disease. This study aims to estimate the seroprevalence of SARS-CoV-2 infection among HCWs in two Yemeni governorates and identify associated factors using a cross-sectional design. Method A total of 404 HCWs were surveyed from June 2022 to September 2022 in Lahj and AL-Dhalea hospitals. A self-administere

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Can Clean Delivery Kits Prevent Infections? Lessons from Traditional Birth Attendants in Nigeria

Adediwura Oladunni Arowosegbe, Iyabode Olabisi Dedeke, Olufunke Bolatito Shittu et al. · 2023 · Annals of Global Health

Background: In resource-poor settings, perinatal infections contribute significantly to maternal and neonatal deaths, and the use of clean delivery kits (CDKs) has been proposed as a tool to reduce the risk of infection-related deaths. This study aims to assess the acceptability and effectiveness of CDKs in preventing infections in deliveries attended by traditional birth attendants (TBAs) in Abeokuta, Nigeria. Methods: The study was a cluster-randomized trial with 67 birth centres/clusters, 453 births/mothers, and 457 babies randomized to intervention or control arms; intervention involved su

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Measles IgG Antibodies: Is There a Protective Role in COVID 19 Pandemic?‎ ‎

Amira Al Balakosy, Mostafa Alfishawy, Omnia Elnabawy et al. · 2021 · Afro-Egyptian Journal of Infectious and Endemic Diseases

Background and study aim: Epidemiological data reported lower death rates of COVID-19 cases in countries with higher & ‎recent coverage by measles containing vaccines. In this study we aim to identify measles IgG titer ‎in COVID-19 patients & correlate it with disease severity‎‎‎‎. Patients and Method: ‎This is a Cross-sectional study where 78 patients admitted to Ain Shams University Quarantine ‎hospitals with positive PCR for SARS-CoV-2 were enrolled. All patients underwent ‎quantification of serum measles IgG titer. Then classified according to the COVID-19 severity ‎into mild, moderate and

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

The Rhipicephalus (Boophilus) microplus Bm86 gene plays a critical role in the fitness of ticks fed on cattle during acute Babesia bovis infection

Knowles Donald P, Ueti Massaro W, Bastos Reginaldo G et al. · 2010 · Parasites & Vectors

Abstract Background Rhipicephalus ( Boophilus ) microplus is an economically important tick of cattle involved in the transmission of Babesia bovis , the etiological agent of bovine babesiosis. Commercial anti-tick vaccines based on the R. microplus Bm86 glycoprotein have shown some effect in controlling tick infestation; however their efficacy as a stand-alone solution for tick control has been questioned. Understanding the role of the Bm86 gene product in tick biology is critical to identifying additional methods to utilize Bm86 to reduce R. microplus infestation and babesia transmission. Ad

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

High frequency of Taenia solium antigen positivity in patients admitted for neurological disorders in the Rural Hospital of Mosango, Democratic Republic of Congo

Deby Mukendi, Jean-Roger Lilo Kalo, Pascal Lutumba et al. · 2021 · BMC Infectious Diseases

Abstract Background The epidemiology of human cysticercosis and neurocysticercosis, caused by the larval stage of the pork tapeworm Taenia solium, is not well known in the Democratic Republic of Congo (DRC). Within a multicenter etiological and diagnostic study conducted by the NIDIAG consortium (“Better Diagnosis for Neglected Infections”) and investigating several challenging syndromes, we consecutively evaluated from 2012 to 2015 all patients older than 5 years presenting with neurological disorders (neurology cohort) and with fever > 7 days (persistent fever cohort) at the rural hospital o

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Long-term use of first-line highly active antiretroviral therapy is not associated with carotid artery stiffness in human immunodeficiency virus-positive patients

Haohui Zhu, Jianjun Yuan, Yisa Wang et al. · 2014 · Brazilian Journal of Infectious Diseases

Objective: To evaluate whether or not highly active antiretroviral therapy is associated with carotid artery stiffness in human immunodeficiency virus-positive patients in Henan Province, China. Method: Fifty human immunodeficiency virus-positive patients with at least a 5-year history of highly active antiretroviral therapy use and 50 human immunodeficiency virus-positive patients without a history of highly active antiretroviral therapy use were enrolled in this study. Carotid artery intima-media thickness and stiffness were determined by quantitative inter-media thickness and quantitative a

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Plasmodium Parasitaemia and Urine Alterations among Pregnant Women Attending Antenatal Care in Aba Metropolis, Abia State, Nigeria

Paula Melariri, Chioma Ihemanma, Udoka Chigbo et al. · 2024 · Journal of Parasitology Research

Malaria presents a huge threat to pregnant women, their foetus, and children below five years. This study is aimed at assessing malaria prevalence, associated clinical symptoms, and urine abnormalities among pregnant women in Aba metropolis, Abia State, Nigeria. A cross-sectional study involving 450 pregnant women purposively selected from nine health care centres was conducted. Data were analysed using SPSS version 26. The overall malaria prevalence rate was 68.4% (n=308). Age group of 21-25 years had the highest prevalence rate of 20.4% (n=92) while the least was recorded among the age group

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

The Decreased Treg Cells Number Associated with Retinal Lesion Size in Ocular Toxoplasmosis

Ovi Sofia, Muna Amalia, Herryanto Thomassawa et al. · 2024 · Interdisciplinary Perspectives on Infectious Diseases

Introduction. The imbalance of the immune response is an important factor contributing to the incidence of ocular toxoplasmosis (OT). Regulatory T cells (Treg) play a key role in maintaining the balance between Th1 and Th17 immune responses, while interleukin-27 (IL-27) levels are related to the differentiation of Th17 cells. This study analyzes the differences in the number of Treg cells and the level of IL-27 between OT patients and seropositive individuals without ocular lesions and its correlation with retinal lesion size. Methods. This analytic observational study, conducted for 8 months,

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Adherence to pre-exposure prophylaxis among men who have sex with men: A prospective cohort study

Dou Qu, Xiaoni Zhong, Guiyuan Xiao et al. · 2018 · International Journal of Infectious Diseases

Objective: To evaluate adherence to pre-exposure prophylaxis (PrEP) in a clinical trial of a population of men who have sex with men (MSM), to explore the influence of social psychology and objective factors (e.g., forgetting, too busy) on adherence, and to provide evidence for subsequent PrEP research. Methods: This study analyzed the data from the daily medication group within a PrEP study (a randomized placebo-controlled trial of oral tenofovir among MSM in Western China from April 2013 to March 2015). A total of 331 participants were analyzed. PrEP adherence was self-reported by the subjec

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Absence of association between angiotensin converting enzyme polymorphism and development of adult respiratory distress syndrome in patients with severe acute respiratory syndrome: a case control study

Chiu Rossa WK, Chim Stephen SC, Wu Alan KL et al. · 2005 · BMC Infectious Diseases

Abstract Background It has been postulated that genetic predisposition may influence the susceptibility to SARS-coronavirus infection and disease outcomes. A recent study has suggested that the deletion allele (D allele) of the angiotensin converting enzyme ( ACE ) gene is associated with hypoxemia in SARS patients. Moreover, the ACE D allele has been shown to be more prevalent in patients suffering from adult respiratory distress syndrome (ARDS) in a previous study. Thus, we have investigated the association between ACE insertion/deletion (I/D) polymorphism and the progression to ARDS or requ

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Letermovir Effectively Prevents Cytomegalovirus Infection in Patients with Aplastic Anemia After Hematopoietic Stem Cell Transplantation: A Real-World Retrospective Cohort Study

Yuling Zhang, Xiaowei Chen, Ming Zhou et al. · 2024 · Infectious Diseases and Therapy

Abstract Introduction In this single-center retrospective cohort study, we investigated the efficacy of letermovir in preventing Cytomegalovirus (CMV) infection in patients with aplastic anemia (AA) who have undergone allogeneic hematopoietic stem cell transplantation (allo-HSCT). Methods Based on whether or not letermovir was used for preventing CMV infection, the patients were categorized into two groups: letermovir and control groups. The overall survival (OS) rate and cumulative incidence of CMV infection during the first 100 days after allo-HSCT were evaluated. The study included 21 match

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Completion of tuberculosis preventive treatment with 300 mg vs. 100 mg isoniazid tablets: a pragmatic randomized clinical trial

João Paulo Cola, Thiago Nascimento do Prado, Bárbara Manuella Cardoso Sodré Alves et al. · 2025 · BMC Infectious Diseases

Abstract Background Monotherapy with the drug isoniazid (INH) was for a long time the main therapeutic regimen used for tuberculosis preventive treatment (TPT). Research is progressing into the use of new therapeutic regimens that provide more complete TPT. The objective was to analyze the completion and safety of TPT with the drug INH in the form of 300 mg tablets. Methods Pragmatic, randomized, non-blinded, multicenter clinical trial conducted in Brazil from January 2019 to December 2022. Subjects over the age of 18 years with an indication for TPT was included and those whose index case of

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Negative / Null Result ReportOpen accessInfectious and parasitic diseases

Assessment of Recovery Time, Worsening, and Death among Inpatients and Outpatients with COVID-19, Treated with Hydroxychloroquine or Chloroquine plus Azithromycin Combination in Burkina Faso

Toussaint Rouamba, Esperance Ouédraogo, Houreratou Barry et al. · 2022 · International Journal of Infectious Diseases

Objectives: Our study aimed to assess the statistical relationship between the use of chloroquine phosphate or hydroxychloroquine plus azithromycin (CQ/HCQ + AZ) and virological recovery, disease worsening, and death among out- and inpatients with COVID-19 in Burkina Faso. Methods and Designs: This was a retrospective observational study that compared outcomes in terms of time to recovery, worsening, and death in patients who received CQ/HCQ + AZ and those who did not using a multivariable Cox or Poisson model before and after propensity matching. Results: Of the 863 patients included in the s

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