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Research goal. Comparative characteristics of the dynamics of CT semiotics and biochemical parameters of two groups of patients: with positive RT-PCR and with triple negative RT-PCR. Reflection of the results by comparing them with the data already available in the literature. The aim of the study is to compare the dynamics of CT semiotics and biochemical parameters of blood tests in two groups of patients: with positive RT-PCR and with triple negative RT-PCR. We also reflect the results by comparing them with the data already available in the literature. Materials and methods. We have performed a retrospective analysis of CT images of 66 patients: group I (n1 = 33) consists of patients who had three- time negative RT-PCR (nasopharyngeal swab for SARS-CoV-2 RNA) during hospitalization, and group II (n2 = 33) includes patients with triple positive RT-PCR. An important selection criterion is the presence of three CT examinations (primary, 1st CT and two dynamic examinations - 2nd CT and 3rd CT) and at least two results of biochemistry (C-reactive protein (CRP), fibrinogen, prothrombin time, procalcitonin) performed in a single time interval of +/- 5 days from 1st CT, upon admission, and +/- 5 days from 3st CT. A total of 198 CT examinations of the lungs were analyzed (3 examinations per patient). Results. The average age of patients in the first group was 58 +/- 14.4 years, in the second - 64.9 +/- 15.7 years. The number of days from the moment of illness to the primary CT scan 6.21 +/- 3.74 in group I, 7.0 (5.0-8.0) in group II, until the 2nd CT scan - 12.5 +/- 4, 87 and 12.0 (10.0-15.0), before the 3rd CT scan - 22.0 (19.0-26.0) and 22.0 (16.0-26.0), respectively. In both groups, all 66 patients (100%), the primary study identified the double-sided ground-glass opacity symptom and 36 of 66 (55%) patients showed consolidation of the lung tissue. Later on, a first follow-up CT defined GGO not in all the cases: it was presented in 22 of 33 (67%) patients with negative RT-PCR (group I) and in 28 of 33 (85%) patients with the positive one (group II). The percentage of studies showing consolidation increased significantly: up to 30 of 33 (91%) patients in group I, and up to 32 of 33 (97%) patients in group II. For the first time, radiological symptoms of "involutional changes" appeared: in 17 (52%) patients of the first group and in 5 (15%) patients of the second one. On second follow-up CT, GGO and consolidations were detected less often than on previous CT: in 1 and 27 patients of group I (3% and 82%, respectively) and in 6 and 30 patients of group II (18% and 91%, respectively), although the consolidation symptom still prevailed significantly . The peak of "involutional changes" occurred on last CT: 31 (94%) and 25 (76%) patients of groups I and II, respectively.So, in the groups studied, the dynamics of changes in lung CT were almost equal. After analyzing the biochemistry parameters, we found out that CRP significantly decreased in 93% of patients (p < 0.001) in group I;in group II, there was a statistically significant decrease in the values of C-reactive protein in 81% of patients (p = 0.005). With an increase in CT severity of coronavirus infection by one degree, an increase in CRP by 41.8 mg/ml should be expected. In group I, a statistically significant (p = 0.001) decrease in fibrinogen was recorded in 77% of patients;and a similar dynamic of this indicator was observed in group II: fibrinogen values decreased in 66% of patients (p = 0.002). Such parameters as procalcitonin and prothrombin time did not significantly change during inpatient treatment of the patients of the studied groups (p = 0.879 and p = 0.135), which may indicate that it is inappropriate to use these parameters in assessing dynamics of patients with a similar course of the disease. When comparing the outcomes of the studied groups, there was a statistically significant higher mortality in group II - 30.3%, in group I - 21.2% (p = 0.043). Conclusion. According to our data, a course of the disease does not significantly differ in the groups o patients with positive RT-PCR and three-time negative RT-PCR. A negative RT-PCR analysis may be associated with an individual peculiarity of a patient such as a low viral load of SARS-CoV-2 in the upper respiratory tract. Therefore, with repeated negative results on the RNA of the virus in the oro- and nasopharynx, one should take into account the clinic, the X-ray picture and biochemical indicators in dynamics and not be afraid to make a diagnosis of COVID-19.Copyright © 2021 ALIES. All rights reserved.
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Compared to other respiratory viruses, the proportion of hospitalizations due to SARS-CoV-2 among children is relatively low. While severe illness is not common among children and young individuals, a particular type of severe condition called multisystem inflammatory syndrome in children (MIS-C) has been reported. The aim of this prospective cohort study, which followed a group of individuals under the age of 19, was to examine the characteristics of patients who had contracted SARS-CoV-2, including their coexisting medical conditions, clinical symptoms, laboratory findings, and outcomes. The study also aimed to investigate the features of children who met the WHO case definition of MIS-C, as well as those who required intensive care. A total of 270 patients were included between March 2020 and December 2021. The eligible criteria were individuals between 0-18 with a confirmed SARS-CoV-2 infection at the Infectious Disease Hospital "Prof. Ivan Kirov"in Sofia, Bulgaria. Nearly 76% of the patients were <= 12 years old. In our study, at least one comorbidity was reported in 28.1% of the cases, with obesity being the most common one (8.9%). Less than 5% of children were transferred to an intensive care unit. We observed a statistically significant difference in the age groups, with children between 5 and 12 years old having a higher likelihood of requiring intensive care compared to other age groups. The median values of PaO2 and SatO2 were higher among patients admitted to the standard ward, while the values of granulocytes and C-reactive protein were higher among those transferred to the intensive care unit. Additionally, we identified 26 children who met the WHO case definition for MIS-C. Our study data supports the evidence of milder COVID-19 in children and young individuals as compared to adults. Older age groups were associated with higher incidence of both MIS-C and ICU admissions.Copyright © 2023 P. Velikov et al., published by Sciendo.
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The present study investigates the presence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the vaginal swabs of female patients diagnosed with coronavirus disease 2019 (COVID-19) based on a positive real-time reverse transcription polymerase chain reaction (RT-PCR) test on a combined throat and nasopharyngeal swab.This study included 48 female patients hospitalized in two tertiary hospitals diagnosed with COVID-19 based on a positive RT-PCR test of the combined throat and nasopharyngeal swab samples, along with clinical and radiological findings. The IBM SPSS software package was used for the statistical analysis of the study data.SARS-CoV-2 positivity was detected in only one patient (2.08 %) in the present study from RT-PCR tests of vaginal swab samples. This patient was a 64-year-old, postmenopausal woman who tested positive for SARS-CoV-2 in a RT-PCR test of a vaginal swab sample six days after having tested positive in an RT-PCR test of a combined throat and nasopharyngeal swab. The patient's partner also tested positive for SARS-CoV-2 in an RT-PCR of a combined throat and nasopharyngeal swab.The present study is the first to report the presence of SARS-CoV-2 in vaginal secretions in Türkiye. The authors believe there is a need for studies investigating the presence of SARS-CoV-2 in the semen samples of the male partners of female patients to establish whether the presence of SARS-CoV-2 in vaginal secretions can play a role in the transmission of the virus. [ FROM AUTHOR] Copyright of Turkish Journal of Biochemistry / Turk Biyokimya Dergisi is the property of De Gruyter and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full . (Copyright applies to all s.)
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Purpose: The aim of this study was to evaluate how prevalent asymptomatic SARS-CoV-2 virus infection (COVID-19) is among patients undergoing ophthalmic surgery at two tertiary referral hospitals. Material(s) and Method(s): This retrospective study included patients without COVID-19 symptoms who underwent preoperative screening using reverse transcription-polymerase chain reaction (RT-PCR) before ophthalmic surgery at the Kocaeli University and Gaziantep University departments of ophthalmology [between September 1, 2020, and December 15, 2020 (group 1);between March 1, 2021, and May 30, 2021 (group 2)]. Patients scheduled for surgery and followed up in the retina, glaucoma, pediatric ophthalmology and strabismus, cataract and refractive surgery, and cornea departments were examined. Result(s): RT-PCR was positive for SARS-CoV-2 in 12 (1.4%) of 840 patients in group 1 and 7 (1.1%) out of 600 patients in group 2. None of the patients were symptomatic of COVID-19. The majority of the patients were scheduled for retina or cataract and refractive surgery in both groups (group 1;retina: 29.2%, cataract and refractive: 57.0%, group-2;retina: 31.3%, cataract and refractive: 54.5%). SARS-CoV-2 RT-PCR testing was positive for seven patients in group 1 (7/245, 2.9%) and five patients in group 2 (5/188, 2.6%) who were scheduled for retinal surgery. Conclusion(s): The necessity, availability, and practicality of COVID-19 RT-PCR testing prior to ophthalmic surgeries varies depending on the protocols of each institution. COVID-19 RT-PCR testing is suggested especially before vitreoretinal surgeries and general anesthesia procedures, because of the difficulty in managing postoperative complications.Copyright © 2023 Gazi Eye Foundation. All rights reserved.
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Coronavirus disease 2019 (COVID-19) is a fatal pandemic viral disease caused by the severe acute respiratory syndrome corona virus type-2 (SARS-CoV-2). The aim of this study is to observe the associations of IL-6, SARS-COV-2 viral load (RNAemia), IL- 6 gene polymorphism and lymphocytes and monocytes in peripheral blood with disease severity in COVID-19 patients. This study was carried out from March 2021 to January 2022. RT-PCR positive 84 COVID-19 patients and 28 healthy subjects were enrolled. Blood was collected to detect SARS-COV-2 viral RNA (RNAemia) by rRT-PCR, serum IL-6 level by chemiluminescence method, SNPs of IL-6 by SSP-PCR, immunophenotyping of lymphocytes and monocyte by flow cytometry. Serum IL-6 level (pg/ml) was considerably high among critical patients (102.02 +/- 149.7) compared to severe (67.20 +/- 129.5) and moderate patients (47.04 +/- 106.5) and healthy controls (3.5 +/- 1.8). Serum SARS-CoV-2 nucleic acid positive cases detected mostly in critical patients (39.28%) and was correlated with extremely high IL-6 level and high mortality (R =.912, P < 0.001). Correlation between IL-6 and monocyte was statistically significant with disease severity (severe group, p < 0.001, and 0.867*** and critical group p < 0.001 and 0.887***). In healthy controls, moderate, severe and critically ill COVID-19 patients, IL-6 174G/C (rs 1800795) GG genotype was 82.14%, 89.20%, 67.85% and 53.57% respectively. CC and GC genotype had strong association with severity of COVID-19 when compared with GG genotype. Significant statistical difference found in genotypes between critical and moderate groups (p < 0.001, OR-10.316, CI-3.22-23.86), where CC genotype was associated with COVID-19 severity and mortality. The absolute count of T cell, B cell, NK cell, CD4+ T cells and CD8+ T cells were significantly decreased in critical group compared to healthy, moderate and severe group (P < 0.001). Exhaustion marker CD94/NKG2A was increased on NK cells and CD8+ cytotoxic T cell among critical and severe group. Absolute count of monocyte was significantly increased in critical group (P < 0.001). Serum IL-6, IL-6 174 G/C gene and SARS-CoV-2 RNAaemia can be used in clinical practice for risk assessment;T cell subsets and monocyte as biomarkers for monitoring COVID-19 severity. Monoclonal antibody targeting IL-6 receptor and NKG2A for therapeutics may prevent disease progression and decrease morbidity and mortality.Copyright © 2023 Elsevier Inc.
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COVID-19 is a widespread contagious viral infection that can severely affect the respiratory system. Although many people recover from using the disease without special care or treatment, pregnant women are particularly vulnerable to pulmonary infections due to their hangers systems system and physiology. To investigate the treatment provided to pregnant women who are PCR-positive for COVID-19 in their early three months of pregnancy, a reanalyzed analyzed data from 84 participants who received treatment at Tangerang Regional Hospital in 2 study was the study conducted based on an ases of observational investigation with a cross-sectional approach. It assembled the data for analysis of the chi-square test. The results showed that 92.9% of participants underwent a cesarean section, while the remaining 7.1% were discharged after giving birth typically or recovering. Additionally, the study did not find any correlation between factors such as age, education, work, gravida, ANC visit, and the impact of COVID-19 on the third trimester of pregnancy at Tangerang Hospital in 2022. The study recommends that pregnant women seek information about pregnancy care from healthcare providers, particularly midwives, posyandu officers, and the media, to make well-known decisions about their health and well-being during this critical period, ensuring a safe and healthy pregnancy outcome.
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A 3D printed (3DP) microfluidic polymerase chain reaction (PCR) device was demonstrated by detecting synthetic SARSCoV-2 at 106 copies/μL. The microfluidic device was fabricated using stereolithography 3DP and had a reaction volume of ~22 nL. The microdevice showed PCR amplification with 85 base synthetic ssDNA targets and primers designed for a SARS-CoV-2-specific region. The device was 2.5 times faster compared to a qPCR instrument with >60,000 times smaller reagent volume. The 3DP microdevice is a promising technology to significantly reduce the manufacturing costs of microfluidic devices that could be used towards point-of-care applications. © 2023 SPIE.
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Canine parvovirus (CPV), canine coronavirus (CCoV) and canine rotavirus (CRV) are the three main causative viruses of diarrhea in dogs with similar clinical symptoms;thereby it is necessary to establish a high effective molecular detection method for differentiating the above pathogens. By optimizing the primer concentration and annealing temperature, a triple PCR method was established for simultaneous detection of CPV, CCoV and CRV, and then the specificity, sensitivity and repeatability of the method were tested. The results showed that the target fragments of CPV VP2 gene (253 bp), CCoV ORF-1b gene (379 bp) and CRV VP6 gene (852 bp) could be accurately amplified by the triple PCR method with high specificity, the detection limits of CPV, CCOV and CRV were 6.44x10-1 pg/L, 8.72x10-1 pg/L and 8.35x10-1 pg/L respectively with high sensitivity, and the method had good stability. Using this triple PCR method, 135 canine diarrhea fecal samples collected in Chengdu region from 2019 to 2020 were detected, and compared with those of single PCR method. The detection rates of CPV, CCoV and CRV were 16.30%, 20.74% and 4.44%, respectively, and the total infection rate was 51.11% (65/135) with 20.00% (13/65) co-infection rate. The detection results were consistent with three single PCR methods. In conclusion, CPV/CCoV/CRV triple PCR method successfully established in this paper can be applied as an effective molecular method to detection of related pathogens and to the epidemiological investigation.
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This study was designed to determine the epidemiological and clinical attributes of COVID-19 patients in the least developed province of Balochistan, Pakistan. The information was obtained from the daily situation report by the Health Department, Government of Balochistan, Pakistan. We investigated the reports of 4177 patients confirmed by RT-PCR tests. Demographic, epidemiological and risk factors data along with comorbidities and clinical signs were recorded. Out of 4500 suspected cases, 4177 cases were directed for the confirmation of COVID-19. A sum of 2177 patients was confirmed to have COVID-19 and 2000 individuals tested negative for the illness. Out of 4177 patients, 2000 patients recovered but 177 patients died because of COVID-19. In current statistics, most males were affected by COVID-19 as 3243 (77.69%) were males and 934 (22.36%) were females. A total of 90.81% of individuals had fever, 88.97% had a cough, 81% had body throbs, and 89.66% had a sore throat. Shortness of breath was observed in 97.06% and 44.09 % had comorbidity. Multiple logistic regression analysis showed that the outcome of patients was associated with gender and symptoms. The district Quetta had the maximum number of COVID-19 cases and deaths. COVID-19 cases and case casualty proportion are low in Balochistan. Whether this is because of failure to do more tests is still to be discovered. Males and individuals of older age are more impacted, and fatalities were higher in cases with co-morbid conditions. Balochistan has a feeble medical care framework and many asymptomatic cases, and needs more rigid screening activities. © 2023, Mahidol University - ASEAN Institute for Health Development. All rights reserved.
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Background: Serum interleukin 6 (IL-6) levels have been studied in the diagnostic evaluation of patients with severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) disease (COVID-19). Methods: We studied the utility of treatment with tocilizumab in COVID-19 patients (n=19) with a negative nasopharyngeal swab real time reverse transcriptase polymerase chain reaction (RT-PCR) test for SARS-CoV-2 who had suggestive computed tomography (CT) findings, namely, COVID-19 Reporting and Data System (CO-RADS) 4,5. Results: Receiver operator characteristic (ROC) curve analysis showed that serum IL 6 at a cut-off of >56.9 pg/L was a predictor of mortality in nasopharyngeal swab RT-PCR negative patients with suggestive CT findings. Tocilizumab had no significant effect on the mortality. Conclusions: In nasopharyngeal swab RT-PCR negative patients with suggestive chest CT findings, elevated serum IL-6 levels > 56.9 pg/L predicted mortality. However, treatment with tocilizumab had no effect on mortality.
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Purpose: The present study aims to compare the results of the COVID-19 rapid antigen test (ExacTest™ COVID-19 Antigen Rapid Test) and real-time polymerase chain reaction (RT-PCR) test in samples of people suspected of coronavirus disease (COVID-19). Materials and methods: Among the samples submitted between January 2022 and March 2022 with suspicion of COVID-19, 299 samples subject to simultaneous COVID-19 RADT (Rapid Antigen Detection Test) and RT- PCR were evaluated retrospectively. The Real-Time PCR test was studied with the DS CORONEX COVID-19 Multiplex Real time-qPCR Test Kit (DS Nano and Biotechnology Product Tracing and Tracking Co., Turkey) and the rapid antigen test was studied by the immunochromatographic method with ExacTest™ COVID-19 Antigen Rapid Test Cassette kit (General Diagnostica inc., California, USA). Ag-RDT test results were evaluated with the fluorescent immunoassay analyzer (FIATEST Analyzer, Hangzhou Alltest Biotech Co., Ltd. China). Results: RT-PCR test was positive in 53 (17.7%) samples. The RADT's sensitivity was found 88.7 (95% Cl 77.0-95.7), specificity 98.0 (95% Cl 95.3-99.3), positive predictive value 90.4 (95% Cl 79.7-95.8), negative predictive value 97.6 (95% Cl 95.0-98.8), and accuracy 96.3 (95% Cl 93.5-98.2). Sample sensitivities of patients under and over 18 years of age have been identified as 75 (95% Cl 19.4-99.4) and 89.8 (95% Cl 77.8-96.6), respectively. The sensitivity of patients with and without symptoms was 95.5 (95% Cl 77.2-99.9) and 83.9 (95% Cl 66.3-94.6), respectively. For samples with a cycle threshold (Ct) of <20, 20-<25, 25-<30 and 30-<35, the concordance of testing was 100%, 92.9%, 78.9% and 80%, respectively. Conclusion: The rapid antigen kit studied complies with the use criteria recommended by the World Health Organization and is quite useful for the rapid diagnosis of symptomatic patients in COVID-19. © 2022, Pamukkale University. All rights reserved.
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Background: Polymerase chain reaction (PCR) is the benchmark in diagnosing of corona virus disease. It takes at least 4 hours. Multiple studies reported that rapid antigen test could be used. Their role in diagnosing corona virus disease 2019 (COVID-19) is questionable. This study was conducted to assess the accuracy of rapid antigen test in Urology and Nephrology Center Mansoura University, Egypt. Methods: COVID-19 rapid ag test was evaluated in comparison to real time PCR as a gold standard in diagnosis of COVID-19 infection in employees and patients with respiratory symptoms in specialized care facility Urology and Nephrology Center of Mansoura University from March 2020 till August 2021. Complete blood picture and non-contrast computerized tomography (CT) was done. Results: Eight hundred and eighty-four (884) individuals (median age 36 years) were included in this study: 478 healthcare workers, 217 non-healthcare workers, and 189 patients. PCR was positive in 569 samples and negative in 315. Out of 315 negative PCR samples, 8 were positive by rapid antigen test with a specificity of 97.4%. Conclusion: Rapid antigen tests in comparison to PCR test have a good accuracy in diagnosis in of COVID-19 infection and can be used during pandemics in low-resource areas. © 2020 The author (s). Published by Zagazig University.
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The lack of enough diagnostic capacity to detect severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) has been one of the major challenges in the control the 2019 COVID pandemic;this led to significant delay in prompt treatment of COVID-19 patients or accurately estimate disease situation. Current methods for the diagnosis of SARS-COV-2 infection on clinical specimens (e.g. nasal swabs) include polymerase chain reaction (PCR) based methods, such as real-time reverse transcription (rRT) PCR, real-time reverse transcription loop-mediated isothermal amplification (rRT-LAMP), and immunoassay based methods, such as rapid antigen test (RAT). These conventional PCR methods excel in sensitivity and specificity but require a laboratory setting and typically take up to six hours to obtain the results whereas RAT has a low sensitivity (typically at least 3000 TCID50/ml) although with the results with 15 mins. We have developed a robust micro-electro-mechanical system (MEMS) based impedance biosensor fit for rapid and accurate detection of SARS-COV-2 of clinical samples in the field with minimal training. The biosensor consisted of three regions that enabled concentrating, trapping, and sensing the virus present in low quantities with high selectivity and sensitivity in 40 minutes using an electrode coated with a specific SARS-COV-2 antibody cross-linker mixture. Changes in the impedance value due to the binding of the SARS-COV-2 antigen to the antibody will indicate positive or negative result. The testing results showed that the biosensor's limit of detection (LoD) for detection of inactivated SARS-COV-2 antigen in phosphate buffer saline (PBS) was as low as 50 TCID50/ml. The biosensor specificity was confirmed using the influenza virus while the selectivity was confirmed using influenza polyclonal sera. Overall, the results showed that the biosensor is able to detect SARS-COV-2 in clinical samples (swabs) in 40 min with a sensitivity of 26 TCID50/ml.
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To establish a method for simultaneous detection of porcine circovirus type 2 (PCV2) and porcine circovirus type 3 (PCV3), specific primers and TaqMan probes were designed after sequence alignment according to the specific sequences of PCV2 Cap gene and PCV3 Cap gene on GenBank. By optimizing the reaction conditions, a duplex fluorescence quantitative PCR detection method for simultaneous detection of porcine circovirus type 2 and 3 was established, and the specificity, sensitivity, and reproducibility were tested. Specificity test results showed that in addition to the positive test results for PCV2 and PCV3, tests for PRRSV, CSFV, PPV, PRV, PEDV, and TGEV were all negative with no cross-reaction, indicating its good specificity. Sensitivity test results showed that the minimum detection limit for detection of PCV2 and PCV3 can both reach 10 copies.L-1, indicating its high sensitivity. The coefficient of variation within and between groups of this method was less than 2%, indicating its good stability. A total of 181 pork and whole blood samples collected from Zhejiang Province were tested using the detection method established in this article and the standard common fluorescent PCR detection method. The results showed that the positive rate of PCV2 was 50.83% (92/181), the positive rate of PCV3 was 37.57% (68/181), and the co-infection rate of PCV2 and PCV3 was 12.15% (22/181). The above detection results of ordinary fluorescent PCR were 50.28% (91/181), 36.46% (66/181), and the co-infection rate was 11.60% (21/181). The coincidence rates of the two methods for PCV2 and PCV3 can reach 98.91% and 97.06%, and the coincidence rate for PCV2 and PCV3 mixed infection were 95.45%. In summary, the duplex fluorescence quantitative PCR detection method established in this experiment can distinguish PCV2 and PCV3 rapidly, which can be used for pathogen detection and epidemiological investigation.
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Background: Many aspects of the severe acute respiratory syndrome coronavirus 2 (SARSCoV2) pandemic in 2019 have been unclear, especially in newborns, and reports of neonatal diseases are usually associated with perinatal infection. Objective(s): The purpose of this study was to evaluate clinical and para-clinical manifestations in newborns that contracted the infection after birth. Method(s): This observational research was conducted from October 2020 to March 2022 to examine postnatal SARSCoV2 infection in infants admitted to the NICU or neonatal ward at the Children's Medical Center in Tehran, Iran. Inclusion in the study was open to neonates who had positive RT-PCR results postnatally. Result(s): In total, 55 newborns were confirmed to have postnatal SARSCOV2. Fever was the most frequently observed symptom, with 35 (61%). Necrotizing enterocolitis was seen in 18% of neonates, and 30% of them were preterm. Neutropenia was seen in 34% of cases, with five cases having severe neutropenia. All neonates had a normal platelet count. Twenty percent of patients showed C-reactive protein higher than 6 mg/L. Two newborns had co-existing bacterial urinary tract infections. Our neonates didn't require antiviral, anticoagulant, or corticosteroid medications, and they recovered while receiving only supportive care. Everyone in the group of newborns was discharged without complications, and there were no deaths. Conclusion(s): The high rate of fever, high C-reactive protein, and neutropenia in SARSCoV2 neonates suggests that more observational research is needed to compare these symptoms to bacterial sepsis to avoid the overuse of antibiotics in these patients.Copyright © 2023, Author(s).
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To develop a multiplex fluorescent quantitative RT-PCR for the detection of porcine epidemic diarrhea virus (PEDV), porcine deltacoronavirus (PDCoV) and swine acute diarrhea syndrome coronavirus (SADS-CoV), in this study, specific primers/probes were designed based on the conserved regions of M, M and N gene sequences of PEDV, PDCoV and SADS-CoV, respectively. After optimization of the reaction conditions, a multiplex fluorescent quantitative RT-PCR for PEDV, PDCoV and SADS-CoV was established. The results of specificity assay showed that the method was positive for detection of PEDV, PDCoV and SADS-CoV, and negative for detection of porcine transmissible gastroenteritis virus, porcine rotavirus, porcine reproductive and respiratory syndrome virus, porcine pseudorabies virus, porcine circovirus type 2, porcine parvovirus, classical swine fever virus and foot-and-mouth disease virus. The results of sensitivity assay showed that the detection limit of this method for PEDV, PDCoV, and SADS-CoV plasmids standard was 1.0x101 copies/L, and had a good linear relationship with their Ct values in the range of 101 copies/L to 106 copies/L. The results of repeatability assay showed that the coefficients of variation (CVs) of intra- and inter-assay reproducibility ranged from 0.33% to 2.53%, indicating good repeatability and stability. To evaluate the effects of the developed method, 100 clinical samples collected from different parts of Henan province were used for detection of these three viruses and compared with those of single RT-PCR and standard methods. The results of multiplex fluorescent quantitative RT-PCR showed that the positive rates of PEDV, PDCoV and SADS-CoV were 38% (38/100), 14% (14/100) and 5% (5/100), respectively. There was no mixed infection. The coincidence rate with the standard detection methods of PEDV and PDCoV was 100%, and the sensitivity was higher than that of single RT-PCR. In this study, a specific, sensitive and rapid multiplex fluorescent quantitative RTPCR method was established for the first time, which could be used for the differential detection of PEDV, PDCoV and SADS-CoV, and laid a foundation for the differential diagnosis and control of porcine diarrheal diseases.
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Transmission prevention is important to prevent the spread of COVID-19. Although most cases are transmitted through droplets and aerosols, several studies have shown the possibility of transmission through fecal material. It is important to identify which patients are more likely to shed SARS-CoV-2 to raise awareness of the virus transmission via their feces. This study aims to determine the association of clinical and laboratory characteristics of COVID-19 patients with the SARS-CoV-2 detection in feces. From May to December 2020, fecal specimens from confirmed COVID-19 patients were collected, processed, and tested for the SARS-CoV-2 RNA presence. Clinical and laboratory parameters were compared between patients with and without SARS-CoV-2 RNA in their feces. Categorical variables were analyzed using Chi-square or Fisher's Exact test, whereas non-categorical variables were analyzed using Independent T test and Mann-Whitney U test. From 51 COVID-19 patients of whom fecal specimen were collected, SARS-CoV-2 RNA was found in the feces of 26 (50.9%). The SARS-CoV-2 presence in the feces was associated with cough (p=0.002), dyspnea (p=0.017), bilateral pneumonia (p=0.011), lower SARS-CoV-2 CT-values in nasopharyngeal and oropharyngeal swabs (p=0.015), and clinical severity (p=0.0023). In conclusion, several clinical characteristics contributing to the COVID-19 severity and higher SARS-CoV-2 viral load in the respiratory tract were associated with the SARS-CoV-2 RNA detection in feces. © 2023 by SPC (Sami Publishing Company).
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Background: Covid-19 (Corona Virus Disease-19) emerged at the end of December 2019, and the current gold standard for Covid-19 testing is molecular-based virus detection with Real Time-Polymerase Chain Reaction (RT-PCR) and Rapid Molecular Test (RMT). In the early of this pandemic, Indonesia, especially Papua, still had difficulty in examining Covid-19. Aims: This study aimed to identify the Covid-19 molecular-based testing capacity of laboratories from various regencies representing five customary areas of Papua in the early pandemic. Methods: This cross-sectional descriptive study with purposive sampling method collected primary data and secondary data from the Papua Provincial and Regency Covid-19 Response Acceleration Task Force and the representative hospitals in five customary areas of Papua (Saireri, Ha anim, Mee Pago, Lapago, Mamta) in May-June 2020. Results: The Covid-19 molecular-based testing capacity in Papua has yet to be maximum in the early pandemic. Conclusion: The Covid-19 molecular-based testing capacity has yet to reach its maximum capacity in the beginning of the pandemic. Regency, which applies the GeneXpert test, is recommended to supply RT-PCR. RT-PCR can be procured in several cities/regencies within one customary area, and samples of the specimens can be delivered more quickly in the same area. © 2022, Airlangga University. All rights reserved.
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Background: The outbreak of acute respiratory syndrome with novel coronavirus 2019 (COVID-19) in December 2019 in Wuhan, China, caused a worldwide outbreak of the disease. To treat the disease, some drugs were identified and introduced that did not show a significant effect on the recovery of the disease. Due to the need to manage inpatient beds, this study was conducted to evaluate the effectiveness of Remdesivir in the treatment of outpatients with moderate to severe COVID-19. Method(s): The present study was a retrospective cohort with a convenience sampling method. It was conducted by referring to the records of COVID-19 patients who were referred to the respiratory clinic of Shahid Beheshti Hospital as outpatients in the period from April to August 2021. Result(s): This study was conducted on 263 COVID-19 patients with a mean age of 51.16+/-14.39 years from 19 and 90 years old. Data were collected through a researcher-made checklist and analyzed using SPSS 20. Kolmogorov-Smirnov test, paired t-test, and Mc Nemar's test were used to evaluate the data. The significance level was considered at the level of 0.05. Conclusion(s): Findings revealed that no clear correlation was found between hospitalization and death rate compared to other patients. In our study, the risk factors for severe COVID-19 did not affect the rate of hospitalization or death of patients.Copyright © 2023 Bentham Science Publishers.
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Introduction: Quality indicators are important parameters to enhance the quality of the clinical laboratory services. Due to the extensive testing processes, errors cannot be completely avoided in a clinical laboratory. To minimize errors, however, adequate training, QC checks, and regular procedure evaluations are beneficial. Objective(s): The objective of the study was to establish and evaluate quality indicators on an ongoing basis as an effort to increase quality. Method(s): This retrospective study, different quality indicators in a molecular laboratory in northern Gujarat were assessed over the course of a year (September 2020-August 2021). Data of total 8176 samples were summarized. Each Quality indicator was examined at the end of the month after being divided into the pre, analytical, and post-analytical stages, respectively. Result(s): As summarization of total 8176 samples, we found a cumulative error rate for all quality indicators of 346 (4.23%). Preanalytical errors were the most common 180 (2.20%), followed by analytical errors 114 (1.39%), and post analytical errors 52 (0.63%). Conclusion(s): There is no question that by continuously striving to develop the outcome of these quality indicators through the adoption of corrective measures over time, the quality of laboratory services and patient care would be improved.Copyright © 2023, Dr Yashwant Research Labs Pvt Ltd. All rights reserved.