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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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In 2019, a new coronavirus (COVID-19) was discovered in Wuhan, China, which soon spread all over the world. The main hallmark of the disease includes fever, diarrhea, vomiting, and dry cough with dyspnea in half of the patients and acute respiratory distress syndrome (ARDS). Currently, no definitive treatment or prevention therapy exists for COVID-19 but scientists and researchers all over the world are relentlessly working to understand COVID-19 to discover novel therapeutic tools and vaccines. Today, photodynamic therapy (PDT) has been investigated as a noninvasive therapy for the treatment of this pandemic and was able to increase the healing process with the help of appropriate photosensitizers by targeting the pathogen inside the patient's body.
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Introduction : Acute gastroenteritis is a typical disorder that accounts for 8-12% of pediatric outpatient visits. Campylobacter and Salmonella infections account for about 8.4% and 11% of global diarrhea cases. Due to the importance of these bacteria in pediatric diseases, the aim of this study was to determine the infectious rate of Salmonella and Campylobacter species and also the frequency of the gene encoding Cytholethal distending toxin in children with community-acquired diarrhea. Materials and Methods: Stool samples of children under 5 years of age with diarrhea were collected. The samples were related to children referred to hospitals in Hamadan, Ardabil, Bandar Abbas and two hospitals in Tehran. DNA was extracted from the samples using a DNA extraction kit from stool. The presence of Campylobacter in the studied samples was detected by polymerase chain reaction using specific primers. A control stool sample was spiked with 10-fold dilution of C. jejuni suspension for LOD (detection limit determination) measurement. Results: In this study, PCR results showed a LOD of 100 CFU per gram in the spiked feces sample. Accordingly, out of 144 fecal samples of children with acute diarrhea, one case was positive for Campylobacter jejuni;this sample was also positive for the presence of cdtB gene. Presence of Salmonella was confirmed in two samples of the patients (1.4%). Conclusion: Low prevalence of Campylobacter and Salmonella was detected in symptomatic children under 5 years of age during the Covid-19 pandemic. Examination of these samples for viruses and other microbial agents can clarify the etiology of diarrhea in children referred to the hospitals.
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Aim: The global COVID-19 pandemic and new variants continue to seriously threaten society. In this study;It was aimed to investigate surveillance of SARS CoV-2 and other respiratory viruses in respiratory tract samples in the winter season of 2020-2021 in Sakarya province. Material and Method: The study was carried out at Sakarya Training and Research Hospital between 2020-2021. e study was carried out with respiratory tract samples (Nasopharyngeal swab) stored in the laboratory. Clinical samples included in study were stored in a Bio-SpeedyRvNATRtransfer tube (Bioeksen,Turkey) and no extraction was performed in accordance with manufacturer's instructions. All analyzes were recorded on BIO-RAD CFX-96C1000 Touch Real-time system device using Diagnovital influenza A/B, SARS CoV-2, RSV multiplex Real Time PCR amplification kit. Results: Of the 200 patients diagnosed with URTI/LRTI, 54.5% were male and 45.5% female. e most common clinical symptoms;sore throat 74%, cough 73.5%, fatigue 71%, fever 57%, runny nose 56%, headache 48.5%, sneezing 41.5%, loss of smell / taste 39.5%, diarrhea 36%, dyspnea was 31.5% and myalgia was 23.5%. PCR positivity rates of samples were analyzed as 28.5% for SARS COV-2 and 1.5% for RSV, respectively. PCR positivity for influenza A/B was not defined in the study. Considering the statistical significance between PCR results and COVID-19 symptoms in patients;symptoms of dyspnea (n=63), fever(n= 62) and sneezing(n=56), respectively, were statistically significant(p<0.05). Conclusion: Due to the circumstances, only three main viral agents could be investigated in the study. RSV was frequently identified as an important factor in pediatric patients, whereas influenza-which may be related to social and individual measures (mask,distance,hygiene)- was not detected in any sample. More comprehensive scientific studies are needed to support the data.
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Objective: In this study, it was aimed to reveal the relationship between the clinical features, presenting symptoms, and prognosis of COVID-19 patients who were hospitalized in our center. Materials and Methods: 499 patients with the diagno-sis of COVID-19 followed in the service and intensive care units of Sakarya University Training and Research Hospital between March 2020 and January 2021 were included in the study. The clinical and demographical data of the patients were obtained from the patient files and hospital automation system. The obtained data were ana-lyzed statistically. Results: Of 499 patients, 171 were followed up in the ward and 328 in the intensive care unit. Follow-up of 230 patients resulted in death, while 269 patients were dis-charged. Comorbid diseases were found to be more fre-quently seen in the mortal group (p< 0.05). Mean leuko-cyte, neutrophil, c-reactive protein (CRP), procalcitonin (PCT), lactate dehydrogenase (LDH), ferritin, d-dimer, and troponin values were higher in the mortal group;whereas mean lymphocyte value was found to be lower (p< 0.05). While fever, cough, and other less common symptoms (diarrhea, nausea, muscle weakness, etc.) were more frequently seen in the non-mortal group (p=0.022, p=0.038, and p=0.000 respectively), shortness of breath was significantly more common in the mortal group (p=0.000). The frequency of symptoms such as sputum, fatigue, sore throat, and the headache were found to be similar in both groups (p >0.05). Conclusion: It was concluded that the clinical course of patients with dyspnea at admission may be more severe and these patients should be followed more closely.
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Objective: To understand the epidemiology and etiology of a cluster of cases with gastroenteritis in a nursing home in Anning district of Lanzhou, and to provide a scientific evidence for the prevention and control of norovirus diarrhea in community nursing centers. Methods: From January 28 to February 4 2021, an epidemiological investigation was conducted on all diarrhea cases, nursing staff and chefs in a nursing home in Anning district, Lanzhou city. Samples of patients' anal swabs, feces, vomitus were collected for norovirus detection by real-time fluorescent PCR. ORF1/ORF2 junction region of norovirus in some selected positive samples(Ct value 25) was sequenced. MEGA-X software was used to construct a phylogenetic tree for genetic evolution analysis using the neighboring method. Results: The first case was confirmed on January20,2021, and the number of cases peaked during January 25and 29.A total of 58 clinically diagnosed cases were reported,57were older people, with an incidence of(57/360,15.83%). Diarrhea(50/58,86.21%),vomiting(35/58,60.34%),nausea(13/58,22.41%)and abdominal pain(6/58,10.34%)were common symptoms, all cases were mild. Fifty-three asymptomatic cases were detected among chefs, housekeepers and nurses.A total of 163specimens were tested, the positive rate of norovirus GII was 49.08%(80/163). The positive rate of fecal samples collected from nurses, chefs and housekeepers was 48.62%(53/109), and was11.11%(2/18)in environmental surface swabs. The possibility of other pathogenic infections such as SARS-CoV-2was ruled out by further tests. Thirteen positive samples were selected for sequencing, and 9were successfully sequenced, they were all recombinant GII.4Sydney_2012 [P16]genotypes, forming an independent cluster, while in a large evolutionary branch with the 2020GII.10 [P16]and 2019GII.2 [P16]virus strains in Lanzhou city, showing a relative close genetic connection. Conclusions: GII .4Sydney_2012[P16]genotype of norovirus is found to be causative pathogen of this outbreak, and close contact is the main reason of the outbreak and persistence of the infection,so asymptomatic infections of norovirus play an important role in the disease spreading. Therefore, public health management in nursing homes and other centralized nursing facilities should be strengthened especially for asymptomatic workers in order to prevent virus transmission.
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Background: Since its first detection in November 2019, the outbreak of severe acute respiratory syndrome coronavirus 2 has influenced over 200 countries, areas or territories worldwide. The virus was initially thought to be a primary respiratory pathogen, but has been reported to have multisystem involvement, including cardiovascular, neurological and gastrointestinal manifestations. The manifestations of liver damage are usually mild and generally asymptomatic. While abdominal symptoms such as pain and diarrhoea are a known presentation, little is known about pancreatic injury as a complication of COVID-19 infection. Aims and Objectives: The aim of the study was to describe the abnormality in liver enzymes and pancreatic enzymes and to correlate it with the severity and outcome of COVID-19 patients. Materials and Methods: A total of 200 patients were enrolled during the study period from August-2020 to July-2021. Data were collected from case files of patients fulfilling the inclusion criteria. Results: A cross sectional study conducted among 200 patients showed that the mean aspartate transaminase and alanine transaminase values were 41.89+or-50.22U/L and 37.69+or-41.41U/L respectively and mean amylase and lipase levels were 97.77+or-126.42U/L and 90.34+or-127.76U/L. The percentage of transaminitis that was present in patients who were discharged was 29.41% when compared to those who died which was 53.33% and this difference is statistically significant(P=0.02). However, there was no statistically significant difference observed in patients with elevated pancreatic enzymes with their outcomes. Conclusion: Hepatic injury is more commonly associated with an increased severity of the disease and also as a contributor for the greater mortality of the COVID-19 patients.
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Aim: Aim of this study is evaluate the clinical features, laboratory values, treatment and follow-up of in children with COVID-19-associated multisystem inflammatory syndrome (MIS-C) disease. Materials and Methods: In this study, patients aged between 2 months and 17 years, who applied to the Inonu University Faculty of Medicine, Department of Pediatrics between March 2020, and February 2021 due to MIS-C related to COVID-19 disease, were reviewed retrospectively. Demographic data, clinical features, laboratory values, treatment and follow-up data of the patients were evaluated. Results: Forty-nine patients diagnosed with MIS-C between March 2020 and February 2021 were included in the study. Thirty-one (72.7%) patients were male and 18 (27.3%) were female. The most common indications for admission were fever (100%), abdominal pain (51.6%), vomiting (42.9%), cough (38.8%), diarrhea (28.8%), shortness of breath, rash, conjunctivitis, and convulsion. Levels of CRP (93.9%), D-dimer (85.7%), fibrinogen (73.4%), interleukin 6 (IL6) (73.4%), procalcitonin (71.4%), NT-proBNP (63.2%) remained at high levels in respective number of patients. The (32.6%) patients were followed up in the intensive care unit. These patients had cardiogenic shock (26.5%), severe pneumonia (18.3%), and acute gastroenteritis (14.3%). It was determined that the mean age of the patients followed up for cardiogenic shock was 12.5 years and relatively higher (p < 0.05). One patient died during follow-up. Conclusion: Although the manifestations of MIS- C due to COVID -19 are seen relatively rarely in children, it constitutes a serious problem and they mostly require hospitalization in intensive care unit, simultaneously involves many organ systems, and leads a serious course with higher risk of mortality. Another problem in these patients is higher rates of cardiac involvement. For this reason, it is important to take necessary precautions to protect children against COVID 19 and its associated MIS-C, and to include them in vaccination programs.
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Objective: Postinfectious irritable bowel syndrome (IBS) is a known entity. We evaluated the incidence of post-COVID-19 IBS in patients discharged from the hospital and analyzed its correlation with the clinical and laboratory parameters, and treatment during the hospital stay. Methods: Three hundred three COVID-19 hospitalized patients without prior history of IBS were prospectively followed after their discharge and were evaluated as per Rome-IV criteria for IBS. Results: One hundred seventy-eight patients were males (58.7%). The age range was 17-95 years (mean +or- SD, 55.9 +or- 15.8). A total of 194 (64%) had mild COVID-19, 74 (24.4%) had moderate COVID-19, whereas 35 (11.6%) had severe COVID-19 infection. Sixteen (5.3%) patients had concomitant GI symptoms during COVID-19 infection. IBS symptoms were found to be present in 32 (10.6%) patients, out of which 17 (53.13%) had diarrhea-predominant, 10 (31.25%) had constipation-predominant, and five (15.62%) had mixed-type IBS. Post-COVID-19 IBS was more common in the female sex (P < 0.001), concomitant GI symptoms with COVID-19 (P < 0.001), oxygen requirement (P = 0.015), deranged liver function tests at the time of admission (P = 0.002), high procalcitonin (P = 0.013), high C-reactive protein levels (P = 0.035);whereas negative correlation was found with remdesivir treatment (P = 0.047). After performing regression analysis, female sex (P < 0.001), oxygen requirement during hospital stay (P = 0.016), GI symptoms during COVID-19 infection (P < 0.001), and high procalcitonin levels (P = 0.017) were independently associated with post-COVID-19 IBS. Conclusion: GI symptoms during active COVID-19 infection increase the chances of developing post-COVID-19 IBS. The risk of developing post-COVID-19 IBS increases in female patients, those requiring oxygen and having high procalcitonin levels during COVID-19 infection.
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Statins, which are widely used to treat hypercholesterolemia, have anti-inflammatory and antioxidant effects, upregulate angiotensin-converting enzyme 2 (ACE2) receptors, which happen to be SARS-CoV-2's gateway into cells. This study aims to analyse the effects of Fenofibrate in comparison to Statins and a control group in patients with COVID-19. This is a retrospective open blind observational study of cohort of 300 patients experienced COVID-19 (symptoms' severity varied between patients). The participants were divided into three cohorts;a control group received standard COVID-19 treatment (n=100);a second group (n=100) of patients who were on Statins, in addition they received the standard treatment;and a third cohort for patients who were already taking Fenofibrate (TRICORR) as a medication to treat hyperlipidemia (n=100). Most symptoms (including cough, exertional dyspnoea, SOB, sore throat, sneezing, headache, tiredness, agitation, diarrhoea, joint pain, insomnia, myalgia, and fatigue) were less prevalent for patients who administered antihyperlipidemic drugs compared to the control group. Patients who were already taking Cholesterol-lowering medication presented with symptoms varied between mild to severe. Patients on Statins or Fenofibrate also showed less tachycardia and tachypnoea compared to those who were not on antihyperlipidemic drugs, and also the need for oxygen and ICU admission were less frequent. The length of stay in hospital was shorter in patients who were already on Statins or Fenofibrate. Both Statins and Fenofibrate have improved the outcome and the severity of symptoms for patients with Covid 19 infection.
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To analyze the epidemiological characteristics and related factors of norovirus in Guangxi from 2015 to 2020, and to provide scientific recommendations for norovirus prevention and control. Methods The foodborne diseases surveillance data were collected from 11 sentinel hospitals through the National Foodborne Disease Monitoring and Reporting System from 2015 to 2020. R software with version 4.0.3 was used for descriptive and statistical analysis, including epidemic curve, chi-square test, and trend chi-square and so on. Logistic regression was used to analyze norovirus-related factors, OR values and 95% confidence intervals were calculated respectively with the statistical test level of P < 0.05. Results There were 1 008 norovirus cases detected, with a detection rate of 12.75% (1 008/7 903). Children with age less than 5 years (OR=1.43, 95%CI: 1.13-1.82) and patients at age 20-45 (OR=1.45, 95%CI: 1.13-1.87) were high risk population. The detection rate was higher in autumn (OR=1.29, 95%CI: 1.08-1.53) but lower in summer (OR=0.67, 95%CI: 0.55-0.80). In addition, the tourist area (Guilin City) presented a higher detection rate than other areas (OR=1.41, 95%CI: 1.10-1.80). Aquatic products (OR=1.40, 95%CI: 1.03-1.91), meat and dairy products (OR=1.31, 95%CI: 1.06-1.61) were high-risk foods for norovirus infection. The prevention and control policies of COVID-19 can reduce the possibility of norovirus by 61% (OR=0.39, 95%CI: 0.31-0.49) showed a declining trend (Trend X2=85.33, P < 0.001). In addition, prolonged visit time can lead to 19%-23% decrease in the detection rate of norovirus (OR24-48 hours=0.81, 95%CI: 0.70-0.95;OR>48 hours=0.77, 95%CI: 0.63-0.93). Conclusions The epidemic of norovirus presented seasonal and regional distribution in Guangxi with a declining detection rate trend in diarrhea patients during recent 6 years. Young children were high-risk population in infection norovirus. The intake of seafood can increase the risk of norovirus infection. The prevention and control policies of COVID-19 can sharply decrease the possibility of infection norovirus. The monitoring of key foods such as seafood should be strengthened, and the early screening of suspected cases should be taken. The norovirus monitoring should be improved to ensure the health of the population.
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Objective: The aim of this study was to establish a one-step multiplex real-time RT-PCR method to simultaneously detect and quantify five swine diarrhea related viruses, PEDV, GARV, PDCoV, SADS-CoV and PTV, so as to provide an efficient and sensitive tool for rapid diagnosis and epidemiological investigation of porcine diarrhea. Method: The ORF3 gene sequences of several genotypes of PEDV were analyzed, and then the primers and probes were designed for detection of PEDV field strains by referring to the ORF3 genes, which contained deletion mutations in attenuated strains. The 5'-end conserved region of NSP5 genes of GARV G3, G4, G5 and G9 strains were analyzed for design of probes and primers. The specific primers and probes targeting to the conserved regions of PDCoV M, PTV 5'UTR and SADS-CoV N genes were designed for detection of the pathogens. The ROC curves were completed by referring to parameters that were set in RStudio. The specificity value, sensitivity value, and areas under the curves (AUC) and Youden value were calculated according to ROC curves to determine the cut-off CT value. The amplified fragments were cloned into pEASY-T1 vector. The standards prepared through in vitro transcription were named as cRNA-PEDV, cRNA-GARV, cRNA-PDCoV, cRNA-PTV and cRNA-SADS-CoV. The sensitivity, specificity and repeatability of one-step multiplex real-time RT-PCR were evaluated. Coincidence rate between this and another similar method were compared in the detection of clinical samples. Result: Both the annealing temperature and optimal concentrations of primers and probes were obtained for detection of the five pathogens. According to the ROC curve, the CT cut off values for detection of PEDV, GARV, PDCoV, PTV, and SADS-CoV were set as 35.78, 34.25, 34.98, 34.60, and 35.70, respectively. The detection sensitivity of this method for the five pathogens could reach 1..102 copies/L. The standard curves had a good linear relationship and the amplification efficiency was between 96.3% and 104%. The established method could not detect the PEDV vaccine strains and other swine infecting viruses and bacteria including TGEV, CSFV, PRV, PRRSV, S.choleraesuis, P.multocida, E.coli, S.suis and S.aureus. The repeatability test showed the range of intra-assay and inter-assay coefficients of variability: 0.22% to 3.08% and 0.89% to 4.0%, respectively. The detection coincidence rates of the established detection method and another similar method for the five pathogens in 242 clinical samples were 97.9%, 98.8%, 100%, 98.3% and 100% for PEDV, GARV, PDCoV, PTV and SADS-CoV, respectively. The Kappa values were all higher than 0.9. The method had advantage over a commercial diagnostic kit for detection of PEDV wild strains in accuracy. Detection results with clinical samples showed that positive rates of PEDV, GARV, PDCoV and PTV was 10.7% (26/242), 13.6% (33/242), 18.2% (44/242) and 14.5% (35/242), respectively, demonstrating the prevalence state of the four pathogens in Sichuan province in the years. SADS-CoV was not detectable in any areas, but the phenomenon of coinfection with different diarrhea causing viruses was common. Therefore, it was necessary to strengthen the surveillance of several porcine diarrhea viruses in Sichuan province for preventive control. Conclusion: In this study, a one-step multiplex real-time RT-PCR was established for simultaneous detection of PEDV wild strains, PDCoV, SADS-COV and GARV, PTV multiple genotypes, which provided an efficient and sensitive tool for the differential diagnosis and epidemiological investigation of swine diarrhea disease.
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From 2017 to 2020, 1 078 piglet diarrhea samples were collected from 6 pig farms in different districts of Shanghai. Multiple RT-PCR method was used for detection and analysis to study the infection status of bovine viral diarrhea virus (BVDV) in swinery in Shanghai. The results showed that the overall detection rate of BVDV in swinery in Shanghai was 7.14% (77/1 078), and showed an increasing trend year by year. The mixed infection rate of BVDV and other diarrhea pathogens was high, with the highest dual infection rate (65%, 26/40), mainly BVDV/PASTV (61.54%, 16/26). On this basis, the triple infection rate was 25% (10/40), mainly BVDV/PAStV/PKoV (40%, 4/10) infection mode;The quadruple infection rate was 10% (4/40), which was dominated by BVDV/PAStV/PEDV/PSV (50%, 2/4) infection. The BVDV prevalence in swinery was seasonal, and the prevalence in spring (10.36%) and autumn (13.59%) was higher than that in summer (6.8%) and winter (2.66%). The positive rate of BVDV in different pig farms was significantly different by 0-24.07%. In view of the detection rate of diarrhea virus dominated by PEDV in pig farm 2 had been high in recent years, this study further monitored the infection of BVDV in this pig farm, and found that the detection rate of BVDV in this pig farm was increasing year by year from 2017 to 2019, with the highest detection rate in 2019 (8.61%, 42/488);The mixed infection of BVDV and other diarrhea pathogens was also serious, with the dual infection rate of 57.58% (19/32), triple infection rate of 21.21% (7/32), quadruple infection rate of 21.21% (7/32), respectively. This study enriched the epidemic data of BVDV in swinery in Shanghai, and could provide reference for the prevention and control of pig epidemics.
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The potential death toll from an epidemic is larger than the number of deaths directly associated with the infection. In this study, we find that prenatal exposure to a cholera epidemic in Peru increased childhood mortality and that surviving children were more likely to be underweight and to suffer from diarrhea. We further find that a significant part of this mortality happened during the first day of life, and that prenatal exposure to cholera decreased prenatal care and institutional deliveries, suggesting that the mortality and possibly other longer-term effects were partially driven by a reduction in prenatal investments.
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Objective: To retrospectively analyze the clinical characteristics of 95 patients with severe coronavirus disease 2019 (COVID-19) admitted to Hankou Hospital of Wuhan, and provide evidence for clinical diagnosis and treatment of severe cases. Methods: From January to March 2020, 95 patients with severe COVID-19 were admitted to a designated Hankou Hospital of Wuhan. The clinical manifestations, laboratory examinations, chest CT, respiratory support, drug treatment, and outcomes were collected and analyzed. Results: Among the 95 patients, there were 76(80.0%) severe cases (severe group) and 19 (20.0%) critically ill cases (critically ill group);the average ages of the two groups were (56.9 .. 14.0) and (66.2 .. 14.1) years old, respectively. The main symptoms included fever [85 (89.5%)], cough [73 (76.8%)] dyspnea [57 (60.0%)], sputum expectoration [32 (33.7%)], diarrhea [20 (21.1%)], etc. The initial symptom was fever [64 (67.4%)], followed by cough [17 (17.9%)]. The main comorbidities were hypertension [29 (30.5%)], diabetes [18 (18.9%), coronary heart disease [12 (12.6%)], etc. Liver injury was the most frequently seen complication which occurred in 35 patients (36.8%), while myocardial damage in 20 patients (21.1%), heart failure in 10 patients (10.5%), and renal damage in 8 patients (8.4%). The level of urea nitrogen [7.5 (3.1-36.6) mmol/L], creatinine [88.0 (46.0-681.0) mol/L], aspartate aminotransferase (AST) [49.0 (8.0-2 290.0) U/L], total bilirubin [12.4 (6.8-112.4) mol/L], white blood cells [8.7 (2.7-16.3) .. 109], neutrophil count [7.9 (1.0-14.6) .. 109/L], high-sensitivity C-reactive protein (hsCRP) [35.6 (0.1-37.9) mg/L] and procalcitonin (PCT) [0.3 (0.1-9.6) ng/mL] in the critically ill group were higher than the severe group [4.5 (1.5-14.6) mmol/L, 70.0 (34.0-149.0) mol/L, 30.5 (10.0-184.0) U/L, 7.8 (1.4-24.5) mol/L, 4.5 (1.7- 10.7) .. 109/L 3.1 (0.6-9.1) .. 109/L, 31.8 (0.1- 40.4) mg/L, 0.1 (0.0- 1.2) ng/mL], and the difference were statistically significant (P all < 0.05);the albumin level reflecting nutritional status [30.2 (24.6-36.4) g/L] was lower than the severe group [35.2(23.5-44.5)g/L], and the difference was statistically significant (P < 0.001). Chest computed tomographic scans showed bilateral ground glass opacity or patchy shadows in the lungs of all patients. A total of 77 patients (82.1%) were discharged, and 13 patients (13.7%) died;of which, the mortality of the critically ill group was 68.4% (13 out of 19). Conclusions: The majority of patients with severe COVID- 19 were elderly. The main clinical manifestations were fever, cough, and dyspnea. Most patients had underlying diseases such as hypertension, diabetes and coronary heart disease. The occurrence of organ dysfunctions such as liver injury, cardiac damage, heart failure and kidney injury might be an important cause of death. The mortality of severe patients with COVID-19 was high, and treatment was even tough.
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The recombinant expression plasmid pIRES-S1 was constructed according to the gene sequence of PEDV S1 in NCBI (GenBank:JQ517274). The plasmid pIRES-S1 was transfected into ST cells by electrotransfer. After G418 pressurization screening, western-blot detection and suspension domestication, a stable transduction cell pool expressing S1 protein was obtained. The results of Western-blot showed that S1 protein have good reactivity. An indirect ELISA was established by using S1 protein as coating antigen, and the ELISA was used to detect PEDV clinical serum and PEDV negative serum of imported breeder pigs. Take the serum neutralization test as the standard, the results showed that the sensitivity of the ELISA was 96.3% and the specificity was 97.7%.It was significantly consistent with the serum neutralization test (kappa value=0.882, P < 0.05). The ELISA was used to detect the tracking serum of PEDV back-feeding pigs. The results showed that it could accurately evaluate the growth and decline of PEDV Ig G antibody level in infected pigs. Our results suggested that the ELISA based on S1 protein established in this study has high sensitivity and specificity. It could be used to detect PEDV antibody in clinical serum samples and provide an effective basis for immune evaluation of PEDV in pigs.
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Background: Poultry and livestock are a leading sub-sector of agriculture, playing an important role to fulfill the protein requirements of the human diet and contributing to the national economy in Bangladesh. This sub-sector is often vulnerable due to frequent outbreaks of diseases in animals and unrest situations worldwide that hamper earning a profit up to the expected mark. Due to pandemic COVID-19, the Bangladesh government was bound to announce a countrywide lockdown and periodical restriction of movement in March 2020 to minimize the spread of the infection. This study aimed to evaluate the impact of COVID-19 on poultry and livestock health.
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We have evaluated the diagnostic performance of immunochromatographic point-of-care tests (POCT) for the detection of rotavirus, coronavirus, Escherichia (E.) coli F5, Cryptosporidium (C.) parvum, Clostridium (Cl.) perfringens and Giardia (G.) intestinalis in fresh and thawed faecal samples from calves aged up to six months with diarrhoea. We performed POCTs to detect rotavirus, coronavirus, E. coli F5, C. parvum, Cl. perfringens and G. intestinalis on fresh samples in a field study and re-evaluated the performance for C. parvum, Cl. perfringens and G. intestinalis using thawed samples. We calculated the performance based on the results of the reference methods, which were RT-qPCR for the detection of rota- and coronavirus and bacteriological culturing and PCR to detect E. coli F5 and Cl. perfringens a and ss2 toxins. C. parvum was detected by phase-contrast microscopy and G. intestinalis by immunofluorescence microscopy. We collected 177 faecal samples from diarrhoeic calves. We found good performance for the POCT targeting rotavirus (sensitivity (SE)=92.9%;specificity (SP)=95.6%) and C. parvum (SE=63.3%;SP=96.2%). For E. coli F5, the number of true positive samples (n=1) was too low to evaluate the performance. The POCT to detect coronavirus gave a poor performance (SE=3.3%;SP=96.6%) and the POCT to detect Cl. perfringens a moderate performance (SE=52.8%;SP=78.2%). G. intestinalis POCT showed a higher sensitivity to immunofluorescence microscopy in thawed than in fresh faecal samples (SE=43.9% versus SE=29.2%). There are substantial differences in diagnostic performance between the commercially available immunochromatographic POCTs. Still, POCT can make a valuable contribution to the diagnosis and prevention of calf diarrhoea.
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Edible vaccines are created from transgenic plants and animals and contain immunostimulant. Edible vaccines, to put it simply, are medications generated from plants or animals. In underdeveloped countries, oral vaccines are less expensive and more widely available. Researchers came up with the idea of edible vaccines, in which edible plant pieces are employed as a vaccine factory. To make edible vaccinations, scientists put desired genes into plants and then force the plants to generate the proteins expressed in the genes. Transgenic plants are the result of transformation, whereas transformation is the act of converting plants. The edible vaccination promotes mucosal immunity. Dendritic cells in the gut can assist native T cells activate and differentiate into follicular T-helpers (Tfh). T and B cells will respond precisely to a reliable, digestible immunization. Potato, tomato, banana, carrots, tobacco, papaya, algae, and a variety of other plants are utilised as alternative agents for standard vaccinations. Malaria, cholera, hepatitis, rabies, measles, rotavirus, diarrhoea cancer treatments and treatment of covid-19 are among the illnesses for which plant-based vaccines have been created. It takes time and dedication to develop and sell edible vaccinations. Many edible vaccines for animal and human ailments have been developed and have gone through various levels of clinical testing. The importance of plant-based vaccinations is emphasized in this article.
ABSTRACT
In order to establish an efficient, sensitive and specific semi-nest RT-PCR method for the detection of Transmissible gastroenteritis virus (TGEV), three specific primers were designed according to the N gene published by GenBank, the reaction system was established and optimized, and specificity and sensitivity were detected. The results showed that the method could successfully amplify the bands of 483 bp and 338 bp, and had good specificity to TGEV, there is no cross reaction with PEDV, PRov, PBov and PDCov, and the lowest sensitivity was 1.86 x 10-1 pg/L. The semi-nest RT-PCR shown the positive rate was 36% in 50 samples of pig diarrhea, which was higher than that of common RT-PCR, and then the positive samples coincidence rate was 100%. This semi-nest RT-PCR method has high sensitivity and specificity, and can accurately diagnose TGEV infection, which provides an effective method for clinical detection and epidemiological investigation of TGEV.