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Chronic Infection

Chronic Infection is a persistent, long-lasting infection that can have significant impacts on an individual's health and well-being.
These infections may be caused by a variety of pathogens, including bacteria, viruses, fungi, or parasites, and can affect various body systems.
Chronic infections are oftne characterized by recurrent or continuous symptoms, and may require prolonged treatment to manage or eradicate the underlying infection.
Understanding the epidemiology, pathogenesis, and optimal treatment approaches for chronic infections is crucial for improving patient outcomes and reducing the burden of these persistent health conditions.
Advancements in diagnostic techniques and therapeutic interventions continue to evolve the management of chronic infections.

Most cited protocols related to «Chronic Infection»

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Publication 2014
Adult Antiviral Agents Bone Marrow Transplantation Chronic Infection Coinfection Disease Progression Hepatitis A Hepatitis B Surface Antigens HIV Patients Therapeutics Vision Woman
The Prospective Evaluation of Antiretrovirals in Resource Limited Settings
(PEARLS) study of the AIDS Clinical Trials Group (ACTG) evaluated two
hypotheses: (1) Antiretroviral regimens administered once daily are non-inferior
to twice-daily regimens; (2) A regimen containing ATV administered once daily
without ritonavir boosting is non-inferior to an EFV-based regimen. Study design
details are available at ClinicalTrials.gov NCT00084136 and in the study
protocol provided in Text S1. The CONSORT checklist used for
preparation of this manuscript is provided in Text
S2
.
Enrollment was limited to the following ACTG international sites: Instituto de
Pesquisa Clinica Evandro Chagas, Rio de Janeiro, Brazil; Hospital Nossa Senhora
da Conceicao-GHC, Porto Alegre, Brazil; Les Centres GHESKIO, Port-au-Prince,
Haiti; YRG Centre for AIDS Research & Education, Chennai, India; National
AIDS Research Institute, Pune, India; College of Medicine Clinical Research
Site, Blantyre, Malawi; Kamuzu Central Hospital, Lilongwe, Malawi; Asociacion
Civil Impacta Salud y Educacion - Miraflores and San Miguel Clinical Research
Site, Lima, Peru; Durban Adult HIV Clinical Research Site, Durban, South Africa;
University of Witwatersrand Clinical HIV Research Unit, Johannesburg, South
Africa; Research Institute for Health Sciences, Chiang Mai, Thailand; and
Parirenyatwa Hospital Clinical Research Center, Harare, Zimbabwe. All ACTG sites
in the United States were also eligible to enroll participants. Enrollment in
the US was limited to no more than 18% of total; the remaining enrollment was
distributed equally across the international sites with an option for
international sites to request additional enrollment once their initial quota of
100 participants was filled.
Eligible participants were ≥18 y, had documented HIV-1 infection, CD4+
lymphocytes <300 cells/µl, and ≤7 d of cumulative antiretroviral therapy
prior to study entry. Persons with absolute neutrophils <750/µl, hemoglobin
<7.5 g/dl, calculated creatinine clearance <60 ml/min, or aspartate
transaminase or alanine transaminase greater than 5-fold above the upper limit
of normal were excluded. Women of reproductive potential were non-pregnant and,
if participating in sexual activity that could lead to pregnancy, agreed to use
contraception (two forms if taking EFV). Persons with serious chronic, acute, or
recurrent infections had completed ≥14 d of therapy and were clinically
stable.
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Publication 2012
Acquired Immunodeficiency Syndrome Adult Alanine Transaminase CD4 Positive T Lymphocytes Cells Chronic Infection Creatinine Hemoglobin HIV Infections Neutrophil Pregnancy Reproduction Ritonavir Therapeutics Treatment Protocols Woman
We used a simple target cell limited model to describe SARS-CoV-2, SARS-CoV, and MERS-CoV viral dynamics [20 (link),24 (link),67 (link)]. Target cell limited models have proved very valuable in understanding infection dynamics and therapy for chronic viral infections such as HIV [61 (link),68 (link)], HCV [69 (link)], and HBV [70 (link)] and for acute infections such as influenza [71 (link)], West Nile virus [72 (link)], Zika virus [73 (link)], and SARS-CoV-2 [17 (link),74 (link),75 (link)]. Although the model does not explicitly describe immune responses, the effects of immune responses are implicitly included in model parameters such as the infection rate, which can be influenced by innate responses, and the death rate of infected cells, which can be influenced by adaptive immune responses. Because of the simplicity of the model, these parameters can be estimated and compared among the 3 different coronaviruses. The form of the model that we use was first introduced to model influenza infection [71 (link)] and is given by
dT(t)dt=βT(t)V(t),
dI(t)dt=βT(t)V(t)δI(t),
dV(t)dt=pI(t)cV(t),
where the variables T(t), I(t), and V(t) are the number of uninfected target cells, the number of infected target cells, and the amount of virus at time t (note: we used time after symptom onset as the timescale), respectively. Symptom onset is defined slightly differently between papers, but it essentially means when any coronavirus-related symptoms (fever, cough, and shortness of breath) appear [76 ]. The parameters β, δ, p, and c represent the rate constant for virus infection, the death rate of infected cells, the per cell viral production rate, and the per capita clearance rate of the virus, respectively. Since the clearance rate of the virus is typically much larger than the death rate of the infected cells in vivo [27 (link),67 (link),77 ], we made a quasi-steady state (QSS) assumption, dV(t)/dt = 0, and replaced Eq 3 with V(t) = pI(t)/c. Because data on the numbers of coronavirus RNA copies, V(t), rather than the number of infected cells, I(t), were available, I(t) = cV(t)/p was substituted into Eq 2 to obtain
dV(t)dt=pβcT(t)V(t)δV(t).
Furthermore, we replaced T(t) by the fraction of target cells remaining at time t, i.e., f(t) = T(t)/T(0), where T(0) is the initial number of uninfected target cells. Note f(0) = 1. Accordingly, we obtained the following simplified mathematical model, which we employed to analyze the viral load data in this study:
df(t)dt=βf(t)V(t),
dV(t)dt=γf(t)V(t)δV(t),
where γ = pβT(0)/c corresponds to the maximum viral replication rate under the assumption that target cells are continuously depleted during the course of infection. Thus, f(t) is equal to or less than 1 and continuously declines.
In our analyses, the variable V(t) corresponds to the viral load for SARS-CoV-2, MERS-CoV, and SARS-CoV (copies/ml). Because all of them cause acute infection, loss of target cells by physiological turnover can be ignored, considering the long lifespan of the target cells.
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Publication 2021
Cell Death Chronic Infection Coronavirus Infections Cough Dyspnea Fever Head Infection Influenza Metabolic Clearance Rate Middle East Respiratory Syndrome Coronavirus physiology Response, Humoral Immune Response, Immune SARS-CoV-2 Severe acute respiratory syndrome-related coronavirus Therapeutics Virus Virus Diseases Virus Replication West Nile virus Zika Virus

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Publication 2020
Antihypertensive Agents Arthritis Blood Pressure Cerebrovascular Accident Chronic Infection Diabetes Mellitus Digestive System Disorders Disease, Chronic Dyslipidemias Food Head Health Services, Outpatient Heart Diseases High Blood Pressures Hospitalization Households Inpatient Kidney Diseases Liver Diseases Lung Lung Diseases Malignant Neoplasms Memory Disorders Mental Recall Noncommunicable Diseases Nurses Outpatients Physical Examination Pressure, Diastolic Systole Systolic Pressure
We estimated the number of chronic HBV infections prevented in the 1992–2013 birth cohorts by using Goldstein’s model, which was used in the 2006 survey to estimate baseline disease prevalence and cases prevented (21 (link)). This model provides estimates of total numbers of cases and deaths caused by acute HBV infection and numbers of cases and sequelae from chronic HBV infection, including cirrhosis and primary hepatocellular carcinoma that would develop during the lifetime of a birth cohort. The key inputs to the model are baseline HBsAg seroprevalence in the entire population and among women of childbearing age and HepB coverage. Figures on the effect of vaccination by birth cohort were summed to estimate the overall effect by using birth cohort sizes of 16.97 million persons per year. We assumed a baseline HBsAg prevalence of 8.58% among women of childbearing age, uniformly distributed, with 30% also being HBeAg positive. Among 5-year-old children, 32% were assumed to become chronically HBV-infected (anti-HBc positive) by 5 years of age and 55% to be chronically infected by 30 years of age; these percentages represented force of infection without vaccination (6 (link),20 ).
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Publication 2017
Birth Cohort Child Chronic Infection Cirrhosis gamma-hydroxy-gamma-ethyl-gamma-phenylbutyramide Hepatitis B Surface Antigens Hepatocellular Carcinomas Infection sequels Vaccination Woman

Most recents protocols related to «Chronic Infection»

Example 20

Fertility—Progesterone is one of the most important hormones for pregnancy with myriad functions from ensuring implantation of the egg into a healthy uterine wall, to ensuring embryo survival and prevention of immune rejection of the developing baby. Many other hormones act in concert with progesterone, like Follicular Stimulating Hormone (FSH) and Luteinizing Hormone (LH) and can be used to assess optimal fertility windows on a monthly basis. And in fact an over dominant production of estrogen can lead to progesterone deficiency and thus difficulty getting or staying pregnant. It is important that women not only monitor FSH and LH to determine optimal fertility for getting pregnant, but ensure that sufficient levels or progesterone are being produced to ensure pregnancy and viability of the fetus. A study from the British Medical Journal, 2012, demonstrated that a single progesterone level test can help discriminate between viable and nonviable pregnancies. Among women who had an ultrasound, 73 percent had nonviable pregnancies. But among women with progesterone levels below 3 to 6 nanograms per milliliter, the probability of a nonviable pregnancy rose to more than 99 percent (Gallos L et al. British Medical J, 2012).

Perimenopause—Monitoring hormone levels during the menopausal transition may help women better understand important changes in their body and allow them to make more informed decisions about health, diet, and lifestyle. According to Hale G E (Best Pract Res Clin Obstet Gynaecol, 2009), data from endocrine studies on women throughout the menopausal transition show changes in levels of steroid hormones and gonadotropins (Progesterone, Estrodiol, LH, FSH and AMH) and follicle-stimulating hormone undergoes the first detectable change while menstrual cycles remain regular. Erratic and less predictable changes in steroid hormones follow, especially with the onset of irregular cycles. Later serum hormone studies on the inhibins and anti-Mullerian hormone established that diminishing ovarian follicle number contributes to the endocrine changes with advancing reproductive age.

Many fertility issues revolve around genetic, anatomical or other disorders that may either prevent a woman from becoming pregnant and/or staying pregnant. Some of these disorders include hormonal imbalances, diabetes, a short or insufficient cervix, and acute or chronic infections. A cascade of genes has been implicated in the occurrence of getting and staying pregnant. These genes have been studied using genotyping, gene expression, and proteomic analysis to assess a woman's ability to stay pregnant.

In some embodiments the disclosed device focuses on detecting levels of Progesterone, LH, FSH, Estrodiol, AMH, genotyping, gene expression through RNA and methylome sequencing, qPCR and proteomic analysis for fertility and menopause management from menstrual blood or cervicovaginal fluid.

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Patent 2024
BLOOD Cervix Uteri Chronic Infection Diabetes Mellitus Diet Embryo Endocrine System Diseases Epigenome Estrogens Fertility Fetal Viability Follicle-stimulating hormone Gene Expression Genes Genes, vif Gonadotropins Hormones Human Body Human Follicle Stimulating Hormone Infant Inhibin Luteinizing hormone Medical Devices Menopause Menstrual Cycle Menstruation Mullerian-Inhibiting Hormone Ovarian Follicle Ovum Implantation Perimenopause Pregnancy Progesterone Reproduction Steroids System, Endocrine Transcription, Genetic Ultrasonography Uterus Woman
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Example 51

The NOD SCID gamma mouse model of chronic, asymptomatic C. parvum infection was used to test in vivo compound efficacy. NOD SCID gamma mice were infected with ˜1×105 C. parvum oocysts by oral gavage 5-7 days after weaning. The infected animals begin shedding oocysts in the feces 1 week after infection, which is measured by quantitative PCR (qPCR). Based on experience with the positive control compound paromomycin, four mice are required per experimental group to achieve 80% power to detect an 80% percent reduction in parasite shedding after four days of drug compound. In additional to the experimental drug regimen groups, additional negative (gavage with DMSO/methylcellulose carrier) and positive (paromomycin 2000 mg/kg once daily) control groups are included in each experiment. Mice are infected 5-7 days after weaning (day −6), infection is confirmed 1 week later (day 0), and experimental compounds are dosed by oral gavage on days 1-4. The dosing frequency was as indicated. Treatment efficacy was assessed by measurement of fecal oocyst shedding by qPCR on day 5.

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Patent 2024
Animals Asymptomatic Infections Biological Assay Chronic Infection Drug Compounding Feces Gamma Rays Infection Investigational New Drugs Methylcellulose Mice, Inbred NOD Mus Oocysts Parasites Paromomycin SCID Mice Sulfoxide, Dimethyl Treatment Protocols Tube Feeding
Two hundred and ten individuals were willing to join this study (May 10, 2021, to July 1, 2022). The exclusion criteria for the two groups were as follows: type 1 diabetes mellitus, impaired fasting glucose or impaired glucose tolerance58 (link), hypertension, hypoglycemia (blood sugar levels < 3.9 mmol/L), hyperlipidemia, serious eye diseases (e.g., blindness), symptoms of neurological conditions (e.g., cerebral infarction or hemorrhage), history of neurological abnormality (e.g., Parkinson’s disease), severe head injuries or chronic head discomfort (e.g., migraine), BMI > 31 kg/m2, left- or mixed-handedness, substance (tobacco, alcohol, or psychoactive drug) abuse, taking medications that may affect cognition and memory within 6 months, specific abnormalities detected on conventional MRI scans or any other factors that may influence brain structure or function (e.g., extreme physical weakness, chronic infections, and other endocrine diseases). Patients with T2DM were diagnosed by two experienced endocrinologists following international clinical standards59 . MCI was evaluated via Mini-Mental State Examination (MMSE) and MoCA-B (21 ≤ MoCA-B score < 26, and MMSE score > 24 were diagnosed with MCI)60 ,61 (link).
Participants with brain tumors (n = 3), neuropsychiatric diseases (n = 4) (e.g., major depression or schizophrenia), or developmental disorders (n = 4) were excluded. Finally, 37 patients with T2DM-MCI, 93 patients with T2DM-NCI, and 69 NC were enrolled in this study. The source of patients with T2DM and NC corresponded with our previous study37 (link). This study was approved by the ethics committee of The First Affiliated Hospital of Guangzhou University of Chinese Medicine (ID: NO. JY [2020] 288). Written informed consent was obtained from all participants. In addition, the study was conducted following approved guidelines.
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Publication 2023
Asthenia Blindness Blood Glucose Brain Brain Neoplasms Cerebral Infarction Chinese Chronic Infection Cognition Congenital Abnormality Craniocerebral Trauma Developmental Disabilities Diabetes Mellitus, Insulin-Dependent Drug Abuse Endocrine System Diseases Endocrinologists Ethanol Ethics Committees, Clinical Eye Disorders Glucose Head Hemorrhage High Blood Pressures Hyperlipidemia Hypoglycemia Major Depressive Disorder Memory Migraine Disorders Mini Mental State Examination MRI Scans Nervous System Abnormality Nervous System Disorder Patients Pharmaceutical Preparations Physical Examination Psychotropic Drugs Schizophrenia Tobacco Products
This retrospective study reviewed medical charts was performed in a center for maternal, fetal, and neonatal medicine in Haseki Training and Research Hospital, with 89 pregnant women admitted with placental abruption. There were 7077 pregnant women who were delivered between 2016 and 2020 in the study period. The approval of the Haseki Training and Research Hospital Clinical Research Ethics Committee was obtained for this study (date: August 04, 2021, number: 62-2021) and the valid Helsinki Declaration. At the first admission, the diagnosis of placental abruption was confirmed primarily on ultrasonographic examination or one or more of the following clinical features, including uterine tenderness, abdominal pain, and vaginal bleeding or with or without abnormal fetal heart activity. Placental abruption was reconfirmed during cesarean delivery by local examination of the placenta for separation and the presence of a retroplacental hematoma. The suspected placenta was sent to the Pathology Laboratory to confirm the presence of the abruption.
Medical charts of the study participants for this period were screened for baseline clinical, obstetric and ultrasonographic features, presence of stillbirth, pre-and post-delivery laboratory results, required transfusion and its amount, and neonatal outcomes of women with placental abruption with or without stillbirth were collected. A composite poor maternal outcome was recorded if any of the following features were present: hemorrhagic shock and DIC. The results of the hemogram tests, which are the targeted parameters of the study and routinely applied both at admission and 4 h postoperatively, were recorded. Exclusion criteria included clinical conditions, including known acute or chronic maternal infections, hematological disorders (disorders affecting thrombocyte function and hematological cancers), and chronic systemic disorders affecting the results of complete blood count.
Publication 2023
Abdominal Pain Abruptio Placentae Blood Platelets Blood Transfusion Care, Prenatal Cesarean Section Chronic Infection Complete Blood Count Diagnosis Disease, Chronic Ethics Committees, Clinical Ethics Committees, Research Fetal Heart Hematological Disease Hematologic Neoplasms Hematoma Infant, Newborn Mothers Obstetric Delivery Pharmaceutical Preparations Placenta Pregnant Women Shock, Hemorrhagic Training Programs Uterus Woman
The study population comprised 14 healthy individuals and 38 SLE subjects divided into the following groups: 27 inactive lupus (SLEDAI ≤6), 11 with active disease (SLEDAI >6) were recruited from the department of Immunology and Rheumatology of the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán. All SLE patients fulfilled ACR/SLICC 2012 classification criteria (28 (link)), and disease activity was addressed by the SLE disease activity index (SLEDAI). We excluded subjects with ongoing acute or chronic infections (i.e., HIV or viral hepatitis), pregnancy, and patients with a diagnosis of other concomitant autoimmune diseases except for antiphospholipid (aPL) syndrome. None of the study participants received any B cell-depleting or other biological therapies. This study was approved by the Institutional Ethics and Research Committees of the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán (Ref. 2306). The patients/participants provided their written informed consent to participate prior to inclusion in the study. Demographic and Clinical characteristics of the study population are depicted in Table 1.
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Publication 2023
4-maleimido-2,2,6,6-tetramethylpiperidinooxyl Antiphospholipid Syndrome Autoimmune Diseases B-Lymphocytes Chronic Infection Diagnosis Hepatitis Viruses Lupus Vulgaris Patients Pregnancy Therapies, Biological

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More about "Chronic Infection"

Chronic infections are persistent, long-lasting health conditions caused by a variety of pathogens, including bacteria, viruses, fungi, or parasites.
These infections can affect different body systems and often lead to recurrent or continuous symptoms, requiring prolonged treatment for management or eradication.
Understanding the epidemiology, pathogenesis, and optimal treatment approaches for chronic infections is crucial for improving patient outcomes and reducing the burden of these persistent health issues.
Advancements in diagnostic techniques, such as FibroScan, Cobas TaqMan HCV Test v2.0, and RealTime HCV assay, as well as therapeutic interventions, like Pegasys, continue to evolve the management of chronic infections.
The use of statistical software, such as Stata version 14 and SAS 9.4, can help researchers analyze the data and gain insights into the epidemiology and risk factors associated with chronic infections.
Additionally, laboratory techniques, including the use of Penicillin/streptomycin, TRIzol reagent, and DNase I, play a vital role in the study and management of these persistent health conditions.
By leveraging the latest research, technologies, and analytical tools, healthcare professionals and researchers can work to enhance the understanding and treatment of chronic infections, ultimately improving the quality of life for those affected by these long-lasting health challenges.