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OBJECTIVE: To analyze the role of nosocomial infection informatics surveillance system in the prevention and control of multidrug-resistant organisms(MDROs) infections. METHODS: The First Affiliated Hospital of Guangdong Pharmaceutical University was selected as the study subjects, which had adopted the nosocomial infection informatics surveillance system since Jan.2020. The period of Jan.to Dec.2020 were regarded as the study period, and Jan.to Dec.2019 were regarded as the control period. The situation of nosocomial infection and MDROs infections in the two periods were retrospectively analyzed. RESULTS: The incidence of nosocomial infections and underreporting of nosocomial infection cases in this hospital during the study period were 2.52%(1 325/52 624) and 1.74%(23/1 325), respectively, and the incidences of ventilator associated pneumonia(VAP), catheter related bloodstream infection(CRBSI), catheter related urinary tract infection(CAUTI)were 4.10(31/7 568), 2.11(14/6 634), and 2.50(25/9 993) respectively, which were lower than those during the control period(P< 0.05). The positive rate of pathogenic examination in the hospital during the study period was 77.95%(1 269/1 628), which was higher than that during the control period(P<0.05), the overall detection rate of MDROs was 15.77%(206/1 306), the detection rates of MDROs in Escherichia coli, Acinetobacter baumannii, Klebsiella pneumoniae, Staphylococcus epidermidis, Pseudomonas aeruginosa and Staphylococcus aureus were lower than those during the control period(P<0.05). CONCLUSION: The development and application of the informatics technology-based surveillance system of nosocomial infection could effectively reduce the incidence of nosocomial infections and device related infections, decrease the under-reporting of infection cases, and also reduce the detection rate of MDROs as well as the proportion of MDROs detected in common pathogenic species.
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Objective: To explore the pathogen composition and distribution characteristics of pathogens in respiratory samples from patients with fever of unknown origin. Methods: A total of 96 respiratory samples of patients with unknown cause fever with respiratory symptoms were collected from four hospitals above grade II in Shijiazhuang area (Hebei Provincial Hospital of Traditional Chinese Medicine, Luancheng District People's Hospital, Luquan District People's Hospital, Shenze County Hospital) from January to April 2020, and multiplex-fluorescent polymerase chain reaction(PCR)was used to detect influenza A virus, influenza B virus, enterovirus, parainfluenza virus I/II/III/IV, respiratory adenovirus, human metapneumovirus, respiratory syncytial virus, human rhinovirus, human bocavirus, COVID-19, Mycoplasma pneumoniae, Chlamydia pneumoniae, Legionella pneumophila, Pseudomonas aeruginosa, Streptococcus pneumoniae, Klebsiella pneumoniae, Group A streptococcus, Haemophilus influenzae, Staphylococcus aureus nucleic acid detection, the results were analyzed for chi-square. Results: A total of 8 pathogens were detected in the upper respiratory tract samples of 96 fever patients, including 1 kind of virus, 6 kinds of bacterias, and Mycoplasma pneumoniae. There were 12 viruses including influenza virus and parainfluenza virus, Legionella pneumophila and Chlamydia pneumoniae were not detected. The pathogen detection rates in descending order were Streptococcus pneumoniae (58/96, 60.42%), Haemophilus influenzae(38/96, 39.58%), Klebsiella pneumoniae (14/96, 14.58%), Staphylococcus aureus (10/96, 10.42%), Mycoplasma pneumoniae (8/96, 8.33%), Pseudomonas aeruginosa (6/96, 6.25%), Group A streptococcus (4/96, 4.17%) and human rhinovirus (2/96, 2.08%). The proportions of single-pathogen infection and multi-pathogen mixed infection in fever clinic patients were similar, 41.67% (40/96) and 45.83% (44/96), respectively, and 12.50% (12/96)of the cases had no pathogens detected. The infection rate of Mycoplasma pneumoniae in female patients with fever (21.43%) was higher than that in male patients with fever (2.94%) (P < 0.05). There was no statistical difference between the distribution of of other pathogens and gender and age(P > 0.05). Conclusions: The upper respiratory tract pathogens were mainly bacterial infections, and occasional human rhinovirus and Mycoplasma pneumonia infections. In clinical diagnosis and treatment, comprehensive consideration should be given to the pathogen detection.
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Purpose: Today, coronavirus disease-19 (COVID-19) treatment is an evolving process, and synbiotic administration has been suggested as a new therapeutic strategy. This study aims to investigate the effect of synbiotic supplementation in COVID-19 patients. Design/methodology/approach: In this placebo-controlled trial, 80 patients were randomized to receive oral synbiotic capsule (containing fructooligosaccharide and seven bacterial strains;Lactobacillus (L) casei, L. rhamnosus, Streptococcus thermophilus, Bifidobacterium breve, L. acidophilus, Bifidobacterium longum, L. bulgaricus, each one 109 colony-forming units) or placebo for two months. Inflammatory markers (Interleukin-6 [IL-6], C-reactive protein [CRP], erythrocyte sedimentation rate [ESR]) and white blood cell (WBC) count were evaluated at two timepoints (baseline, two months later). The measured variables were adjusted for confounders and analyzed by SPSS v21.0. Findings: All 80 enrolled patients completed the study. The study adherence was good (approximately 70%). The mean changes for IL-6 were not significant ( = -0.6 +or- 10.4 pg/mL vs = +11.2 +or- 50.3 pg/mL, p > 0.05). There were no significant improvements for CRP, ESR and WBC. Originality/value: Administration of synbiotics for two months did not improve inflammatory markers in COVID-19 patients.
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Background: Clostridium spp. spores are resistant to many factors, including alcohol-based disinfectants. The presence of clostridial spores in a hospital environment may lead to infection outbreaks among patients and health care workers. Background: This study is aimed to detect clostridial spores in the aurology hospital using C diff Banana BrothTM and assess the antibiotic sensitivity and toxinotypes of isolates. Methods: After diagnosing COVID-19 in medical staff and closing an 86-bed urology hospital in 2020 for H2O2 fogging, 58 swabs from the hospital environment were inoculated to C diff Banana BrothTM, incubated at 37 degrees C for 14 days, checked daily, and positive broths were sub-cultured anaerobically for 48 h at 37 degrees C. After identification, multiplex PCR (mPCR) was performed for Clostridium perfringens, C. difficile toxin genes, and minimum inhibitory concentration (MIC) determination. Results: In this study, 16 out of 58 (~ 28%) strains of Clostridium spp. were cultured: 11 - C. perfringens, 2 - C. baratii, and 1 each of C. paraputrificum, C. difficile, and C. clostridioforme. 11 C. perfringens were positive for the cpa, 7 - the cpb2, 2 - cpiA, and 1 - cpb toxin genes. All isolates were sensitive to metronidazole, vancomycin, moxifloxacin, penicillin/tazobactam, and rifampicin. Two out of the 11 C. perfringens strains were resistant to erythromycin and clindamycin. Conclusions: Regardless of the performed H2O2 fogging, antibiotic-resistant, toxigenic strains of C. perfringens (69%) obtained from the urology hospital environment were cultured using C diff Banana BrothTM, indicating the need to develop the necessary sanitary and epidemiological procedures in this hospital.
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These proceedings comprise 85 articles spanning diverse fields such as bacteriology, molecular biology, biotechnology, dermatology, infectious and parasitic diseases, epidemiology, physiotherapy, immunology, mycology, parasitology, pathology, collective health, and virology. The articles delve into a wide range of research topics, from repurposing drugs for Mycobacterium abscessus complex infections to utilising artificial intelligence for SARS-CoV-2 diagnosis. In bacteriology, investigations explore the correlation between smoking and Helicobacter pylori infection in gastric adenocarcinoma patients, as well as the resistance profiles of Staphylococcus aureus and Pseudomonas aeruginosa in tracheostomised children. Molecular biology studies focus on gene polymorphisms related to diseases like paracoccidioidomycosis. Biotechnology research emphasises bioactive molecules in species like Croton urucurana and the development of computational models for cytotoxicity prediction. Dermatology articles address stability characterisation in vegetable oil-based nanoemulsions. The section on infectious and parasitic diseases encompasses studies on COVID-19 vaccine response in pregnant women and the impact of infection prevention measures in rehabilitation hospitals. Epidemiology investigations analyse trends in premature mortality, tuberculosis in diabetic patients, and public adherence to non-pharmacological COVID-19 measures. Physiotherapy research covers topics such as telerehabilitation through a developed game and the prevalence of congenital anomalies. Immunology studies explore immune responses in HIV and Leishmaniasis, whilst mycology investigates the biotechnological potential of fungi from the cerrado biome. Parasitology research evaluates treatment efficacy against vectors parasites such as Aedes aegypti and Toxoplasma gondii. Pathology articles discuss intentional intoxication in cattle and the influence of curcumin on acute kidney injury therapy. Collective health studies focus on intervention plan development in healthcare settings and pesticide use in horticulture. Lastly, virology research investigates parvovirus occurrence in hospitalised children during the COVID-19 pandemic, hidden hepatitis B virus infection in inmates, and the prevalence of HPV and HTLV-1/2 infections in specific populations.
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The last discovered organ of the human body is microbiome which is present at different sites in it. Gut microbiome consists of about 1000–1500 bacterial species and as regulated by genetic makeup, lifestyle, and environmental conditions, the gut microbiota of a healthy individual can comprise approximately 160 species of bacteria. Majority of gut microbiome consists of Firmicutes, Actinobacteria, Bacteroidetes, and to a lesser extent Proteobacteria, Euryarchaeota, Fusobacteria, and Verrucomicrobia. The gut-lung axis is involved in the migration of immune cells from gut to respiratory tract through circulation and encourages the host's ability to fight infections. The gut regulates the responses in lungs via host-acquired inflammatory mediators in the circulation. Dendritic cells located in the Peyer's patches of the intestine, macrophages, and Langerhans cells are the major antigen-presenting cells that play a vital role in the modulation and development of innate immune response. Gut microbiota interacts via the regulation and development of adaptive immune response. B and T lymphocytes are the key players of adaptive immunity. CD4 + T cells after activation differentiate into four major kinds of cell classes: (1) regulatory T cells (Treg), (2) Th2, (3) Th1, and (4) Th17 cells. Gut microbial interactions can induce the production of various types of immune cells as demonstrated by various studies. For instance, Clostridia induces the formation of Treg cells. Likewise, Bacteroides fragilis inhabiting the gut can incite the production of Th1 cells and production of T17 cells is stimulated by segmental filamentous bacteria. Gut microbiota also plays a vital role in the physiology and metabolism leading to the synthesis of various immunoregulatory metabolites such as SCFAs, antimicrobial peptides (AMPs), amino acids, and polyamines. SARS-CoV-2 virus entry to the cell is via ACE2 receptor present in respiratory epithelium and gut epithelium. This receptor is highly expressed (100 times more than in the lung) in the epithelial cells of the stomach, duodenum, ileum, and rectum as well as cholangiocytes and hepatocytes. High level of ACE2 receptor expressing in the gastrointestinal epithelial cells along with high-level co-expression of TMPRSS2 (cellular serine peptidase) causes coronavirus to infect gastrointestinal tract along with lungs leading to altered intestinal permeability and enterocyte malabsorption with symptoms of diarrhea in patients of COVID-19. Hence, COVID-19 patients with gastrointestinal symptoms have significantly longer duration of illness and viral clearance time than patients without any gastrointestinal symptoms. Obese patients with gut dysbiosis have decreased population of Bacteroides species. COVID-19 patients with type 2 diabetics have increased population of Fusobacterium, Ruminococcus, and Blautia with decreased population of Bacteroides, Bifidobacterium, Faecalibacterium, Akkermansia, and Roseburia. Diet with low fiber, high fat, and high carbohydrate causes gut dysbiosis. Intake of high-fiber diet consisting of whole grains, vegetables, and fruits induces growth of Bifidobacterium, Bacteroides, and Lactobacilli. Probiotics are nonpathogenic live organisms which are safe to be taken as dietary supplements. The major genera of probiotics are Lactobacillus, Bifidobacterium, and Saccharomyces. These probiotics increase the activity of T cells, NK cell, and polymorphonuclear cells. Prebiotics in the form of maize fiber, inulin, and polydextrose improves digestion and immunity. Hence, healthy gut microbiome with its strong immune intervention may bring recovery in COVID-19 patients. However, so far no published studies have reported that probiotics can be used as an adjunctive therapy in our fight against the SARS-CoV-2 infection. A far-reaching approach should consist of randomized, multicenter, controlled trials to explore the potential benefits of gut microbiome and how changes in dietary habits can be used as an add-on strategy against the COVID-19 pandemic. © The Author(s), under exc us ve licence to Springer Nature Singapore Pte Ltd. 2021.
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Objective: To explore the distribution and correlation of pathogens in the elderly patients with AECOPD, so as to guide the rational use of antibiotics and hormones in clinic. Methods: A total of 111 patients with acute exacerbation of chronic obstructive pulmonary disease (AECOPD) admitted to Nanjing First Hospital from January 2019 to January 2020 were retrospectively analyzed. The basic data such as eosinophil, neutrophil and lymphocyte count, the levels of C-reactive protein(CRP) and erythrocyte sedimentation rate (ESR)in blood routine examination were collected. Further, the pathogens were qualified by sputum fluorescence quantitative polymerase chain reaction, and the pathogens distribution was analyzed. Results: The level of ESR and the ratio of cardiovascular diseases showed significant differences between the pathogen-positive group and pathogen-negative group. In this study, the top five pathogens in AECOPD patients were EB virus (21.6%), Haemophilus influenzae (19.8%), Streptococcus pneumoniae (17.1%), herpes simplex virus(14.4%), influenza A virus(14.4%). The detection rate of influenza A virus was correlated with influenza B virus and Aspergillus (P < 0.05);The detection rate of respiratory syncytial virus was correlated with Candida, Moraxella catarrholis, Streptococcus pneumoniae and Haemophilus influenzae (P < 0.05);The detection rate of Escherichia coli was correlated with rhinovirus, adenovirus, Klebsiella pneumoniae and Acinetobacter baumannii (P < 0.05);The detection rate of Candida was correlated with that of Moraxella catarrholis and Pseudomonas aeruginosa(P<0.05);The detection rate of human coronavirus was correlated with Haemophilus influenzae, herpes simplex virus and Streptococcus pneumoniae(P < 0.05). Conclusions: AECOPD are mostly induced by different pathogens, especially mixed infection of bacteria and virus. It is helpful to guide the rational use of antibiotics by analyzing the etiological characteristics in the elderly patients with AECOPD.
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Coinfection caused by bacteria, parasites, or viruses complicates almost all feline panleukopenia virus (FPV) infections. Pathogens that colonize the gastrointestinal tract, Clostridium perfingens, Clostridium piliforme, Cryptosporidium spp, Giardia spp, Tritrichomonas fetus, canine parvovirus type 2,Salmonella sp., feline coronavirus, feline bocavirus, and feline astrovirus were isolated in the presence of FPV infection. Complex mechanisms between viruses, bacteria, protozoa, and hosts contribute to the pathogenesis and severity of coinfection. Prompt and accurate diagnosis, vaccination precautions, and appropriate treatment play important roles in reducing morbidity and mortality. This article outlines the etiology, pathogenesis, diagnosis, prevention, and treatment that can help veterinarians and pet owners improve their knowledge of managing the diseases.
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This paper describes the epidemiology, prevalence, transmission, prevention and control of some infectious diseases in companion animals, livestock, wild animals and humans in Ontario, Canada, in 2022, including SARS-CoV-2;Echinococcus multilocularis, Leishmania spp. and SARS-CoV-2;antimicrobial stewardship resources;2 cases of rabid dogs imported from Iran (July 2021 and January 2022);prevalence of extended-spectrum beta-lactamase (ESBL)-producing Enterobacteriacea, Dirofilaria immitis, Brucella canis, canine parainfluenza and adeno- and herpes viruses in dogs recently imported from Asia;Paragonimus kellicotti lung flukes and Streptococcus equi subsp. zooepidemicus in dogs;African swine fever in pet pigs, backyard pigs and wild pigs and blastomycosis in dogs and humans.
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In January 2023, a total of 64 infectious diseases were reported globally, affecting 235 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were COVID-19 (235), monkeypox (110), dengue fever (31), measles (27) and cholera (15). The top five infectious diseases with highest case fatality rates were Nipah virus disease (62.5%), Ebola virus disease (47.0%), Crimean-Congo haemorrhagic fever (37.5%), Lassa fever (15.1%) and West Nile fever (7.6%). The top five infectious diseases with greatest number of deaths were COVID-19, malaria, cholera, measles and dengue fever. The prevalent infectious diseases in Asia were COVID-19, cholera and dengue fever, the prevalent infectious diseases in Africa were COVID-19, cholera, yellow fever, Lassa fever, malaria and monkeypox, the prevalent infectious diseases in America were COVID-19, cholera, monkeypox, dengue fever and chikungunya fever, the prevalent infectious disease in Europe were COVID-19, monkeypox and invasive group A streptococcus infection.
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Background and purpose: The sequence of Omp25 is conserved in all Brucella species. The high antigenicity of the product of this gene stimulates the host's immune system. Using engineered probiotic bacteria is an appropriate method for vaccine transport. The aim of this study was to express the Omp25 of the Brucella abortus pathogenic bacterium in Lactococcus lactis probiotic bacterium. Materials and methods: In this experimental study, the required vector was designed and synthesized to include the gene of interest and a signal peptide (pNZ8148-Usp45-Omp25). E. coli strain TOP10F was transformed using the pNZ8148-Usp45-Omp25 expression vector based on induction by nisin. The recombinant plasmid was extracted from the transformed bacteria using a plasmid extraction kit. The L. lactis was transformed by pNZ8148-Usp45-Omp25 vector using electroporation. Evaluation of the expression of Omp25 gene at the RNA level was assessed by reverse transcription method and confirming the presence of recombinant Omp25 protein in the engineered bacteria using SDS-PAGE method. Results: Successful expression of B. abortus Omp25 in L. lactis was verified by RT-PCR. Subsequently, the proteins were separated based on molecular weight using sodium dodecyl sulfate- polyacrylamide gel electrophoresis (SDS-PAGE). The protein expression analysis showed the expression of Omp25 as a 25 kDa extra band in transformed L. lactis compared to the L. lactis receiving the vector lacking the target gene. Conclusion: This study shows that Omp25 is expressed in L. lactis transformed via pNZ8148-Usp45-Omp25 by electroporation. Transformed L. lactis can be successfully used as a subunit oral vaccine in prevention of Brucellosis.
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Background: The coronavirus disease 2019 (COVID- 19) caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has spread over the world. Although there are minimal microbiological and antibiotic data on COVID-19, bacterial co-infections have been related to poor outcomes in respiratory viralinfections. Adequate antibiotic use in conformity withantibiotic stewardship (ABS) recommendations is necessary during the pandemic. Material and procedure: We conducted a retrospective single-center cohort analysis of 140 adulthospitalised patients (ages 17-99) with confirmed COVID-19 who were admitted between February 16, 2021, and April 22, 2021, and who were discharged onMay 6, 2021. From 140 COVID-19 participants, the following clinical data was gathered: Men made up 63.5 percent of the participants, with a median age of 63.5 years (range 17-99). Results: According to local ABS recommendations, the most commonly administered antibiotic regimen was ampicillin/sulbactam (41.5 percent) with a median length of 6 (range 1-13) days. Urine antigen testing for Legionella pneumophila and Streptococcus peumoniaewas negative in all of the patients. In critically ill patients hospitalised to intensive care units (n = 50), co-infections with Enterobacterales (34.0%) and Aspergillus fumigatus (18.0%) were discovered. Blood cultures obtained at admission had a diagnostic yield of 4.2 percent. Conclusion: While bacterial and fungal co-infections are rare in COVID-19 patients, they are widespread in critically ill individuals. More investigation into the impact of antimicrobial therapy on therapeutic success in COVID-19 patients is essential to prevent antibiotic abuse. COVID-19 management might be improved with the aid of ABS standards. It's also necessary to look at the microbiological patterns of infectious consequences in COVID-19 individuals who are severely unwell.
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This article discusses the worldwide routine vaccination coverage in 2021, as part of the Immunisation Agenda 2030, a global immunisation strategy to reduce morbidity and mortality from vaccine-preventable diseases. The report presents global, regional, and national estimates and trends in vaccination coverage through 2021, based on reviews of country-specific data, including administrative and survey-based coverage. Global estimates show that coverage with 3 doses of diphtheria, tetanus and pertussis-containing vaccine (DTPcv3) and the first dose of measles-containing vaccine (MCV1) decreased to their lowest levels since 2008. In 2021, 25.0 million infants were not vaccinated with DTPcv3, 2.1 million more than in 2020, and 5.9 million more than in 2019. The number of zero-dose children was 37% higher than in 2019, with 18.2 million infants not receiving any DTPcv dose by the age of 12 months. The report highlights that the full recovery from disruptions to immunisation programmes due to the COVID-19 pandemic will require context-specific strategies to find missed children, prioritise essential health services, and strengthen immunisation programmes to prevent outbreaks.
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The recent research focused on the green synthesis of silicon dioxide nanoparticles, SiO2@Cellulose of Zizyphus Spina-Christi nanocomposites, and L-Arginine@SiO2@Cellulose of Zizyphus Spina-Christi nanocomposites using cellulose of Zizyphus Spina-Christi as a new green polymeric surfactant. The structures of nanoparticles and nanocomposites were characterized by different spectroscopy and microscopy techniques. Nanoparticles and nanocomposites were utilized to determine the concentration of chromium, cadmium, and lead in COVID-19 patients using double-vortex-ultrasonic assisted surfactant enhanced dispersive liquid-liquid microextraction. Mean recoveries of chromium, cadmium, and lead were obtained in the range of 86-98% with relative standard deviations below 4%. The advantages of the proposed method are green and novel polymer surfactant with low detection limit. Finally, antibacterial activities were investigated. The maximum inhibition zone of L-Arginine@SiO2@Cellulose of Zizyphus Spina-Christi nanocomposites was obtained for StaphylococcusAureus (21.9..0.4 mm). L-Arginine@SiO2@Cellulose of Zizyphus Spina-Christi nanocomposites have low cytotoxicity against MCF-7 cancer cells. These results indicated the potential ability of L-Arginine@SiO2@Cellulose of Zizyphus Spina-Christi nanocomposites in the determination of metal concentrations in biological samples along with good antibacterial properties and cytotoxic properties.
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In December 2022, a total of 68 infectious diseases were reported globally, affecting 235 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were COVID-19 (235), monkeypox (110), dengue fever (28), measles (27) and cholera (14). The top five infectious diseases with highest case fatality rates were Ebola virus disease (47.0%), Rift Valley fever (44.2%), Crimean-Congo haemorrhagic fever (40.0%), Lassa fever (17.6%) and West Nile fever (7.6%). The top five infectious diseases with greatest number of deaths were COVID-19, malaria, cholera, dengue fever and measles. The prevalent infectious diseases in Asia were COVID-19, cholera and dengue fever, the prevalent infectious diseases in Africa were COVID-19, cholera, yellow fever, Lassa fever, monkeypox, malaria and measles, the prevalent infectious diseases in America were COVID-19, cholera, monkeypox, dengue fever and chikungunya fever, the prevalent infectious disease in Europe were COVID-19, monkeypox and invasive group A streptococcus infection.
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The possession of exotic animals as pets is a social practice that has become more visible in Mexico in recent years, so it is interesting to understand its environmental and social implications and those related to human health. The present study aims to identify the main species of exotic animals kept as pets and the zoonotic diseases reported in these species. We analyzed official figures of seizures of exotic fauna in Mexico and reviewed specialized literature on zoonotic diseases documented in Mexico in these species. We identified zoonoses in species of fauna that can be acquired legally and illegally in the country, reported in environments in which animals coexist with other species and are in direct contact with people, which represents an important factor in the spread and propensity of this type of disease. We conclude that the sanitary regulation of wildlife markets, the monitoring and studying microorganisms associated with wildlife are valuable strategies to prevent the emergence of zoonoses.
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Children are usually affected by pneumonia, which is a common ailment caused by Pathogenic Streptococcus pneumoniae. This study's objective was to isolate and identify S. pneumoniae, which was recovered from blood samples of suspected paediatric pneumonia patients using conventional techniques, such as antibiotic sensitivity profiles and molecular approaches. In this study, forty (40) samples from three major hospitals in the Dinajpur region of Bangladesh were collected and assessed using various bacteriological, biochemical, antibiotic susceptibility test, and molecular techniques. 37.5% of the 40 samples tested positive for pneumonia, and 15 isolates were discovered. In terms of age, pneumonia was more common in children aged 3-5 years (50%) than in those aged 6 to 8 (33.33%), 9 to 11 (25%) and 12 to 15 (20%). According to the results of the current study, the study area had no statistically significant impact (P > 0.05), while age and socioeconomic status had a significant impact on the prevalence of pneumonia in patients with pneumonia (P 0.05). The age group for which pneumonia was most prevalent (at 50%) was that for children between the ages of 3-5. Poor socioeconomic status was associated with the highest prevalence of pneumonia (54.54%). By sequencing the 16S rRNA gene, S. pneumoniae was identified as S. pneumoniae NBRC102642. In the antibiotic investigation, S. pneumoniae was found to be extremely resistant to ciprofloxacin, amikacin, vancomycin, and cefexime, but responsive to erythromycin and azithromycin, as well as neomycin, kanamycin, streptomycin, and bacitracin. S. pneumoniae causes serious complications in paediatric patients, and this scenario requires prevention through vaccination and the development of new, efficient antibiotic therapies for pneumonia. If specific laboratory features of paediatric patients with pneumonia are understood, sepsis will be easier to detect early, treat, and reduce mortality.
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Vaccination is effective in preventing the increase of disease, especially emerging infectious diseases (EIDs), and it is particularly important for people in close contact with infected sources and susceptible populations who are at increased risk of getting infectious diseases due to behavior, occupation or health. Despite targeted vaccination guidelines, inadequate vaccination of the key populations fails to receive widespread attention, resulting in a high-risk transition of disease from key populations to general populations. Strengthening the vaccination of the susceptible groups can effectively block the spread of pathogens to general populations, and reduce the consumption of medical resources in universal vaccination, which has significant economic value. In this review, we describe the prevalence of EIDs, analyze the experience and lessons of infectious disease vaccination in key populations through several cases, and further explore the causes for the decline in vaccination rates of key populations. According to the trends of EIDs, a plan to strengthen the vaccination of key populations is proposed to effectively prevent the transition of EIDs from key populations to general populations.
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This paper describes the clinical signs and use of differential laboratory diagnostic techniques (computed tomography, cytology, histopathology, antigen/antibody detection and polymerase chain reaction) for infectious (viral, bacterial, fungal and parasitic) and non-infectious (inflammatory/immune mediated, neoplastic, cardiac, malformation, foreign body, smoke inhalation, aspiration of caustic material, non-cardiogenic, pulmonary oedema, traumativ, pneumothorax, pulmonary contusions and idiopathic) causes of respiratory diseases in cats and dogs in Ontario, Canada.
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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.