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1.
Alberto Arnedo-Pena Iraya Vivas-Fornas Noemi Meseguer-Ferrer María Dolores Tirado-Balaguer Alberto Yagüe-Muñoz Silvia Herrera-León Susana Sabater-Vidal María Ángeles Romeu-García Ana Vizcaino Batllés Juan Bautista Bellido-Blasco Rosario Moreno-Muñoz 《Enfermedades infecciosas y microbiología clínica》2018,36(8):478-483
Introduction
Salmonella infections (SI) are common in Spain. The aim of this study was to appraise risk factors and the clinical characteristics of sporadic Salmonella Typhimurium infections compared with other sporadic salmonella serotype infections (OSI).Methods
From September 2014 to August 2015, a case-case study was carried out by the Epidemiology Division of the Public Health Centre of Castellon. Case 1 consisted of patients with sporadic S. Typhimurium infections, while case 2 comprised OSI patients, assessed according to the stool cultures analyzed by the Microbiology Laboratories of Hospital General de Castellon and Hospital de La Plana in Vila-real. Patients from detected outbreaks were not included. The salmonella serotype was identified by the National Centre of Microbiology (Madrid).Results
The total number of SI patients reported was 327, 242 of whom were studied (74.0%). 148 patients had sporadic S. Typhimurium infection and 64 had OSI, with median ages of 4 and 8.5 years, respectively. Sporadic S. Typhimurium infection patients presented more blood in feces and diarrhea episodes. Consumption of pork meat (OR = 2.22; 95% CI 1.12–4.43), cold pork meats (OR = 2.49; 95% CI 1.32–4.68) and playing in the dirt (OR = 3.02; 95% CI 1.55–5.88), were associated with sporadic S. Typhimurium infection. In the 0–4 year-old group, the associated factors were consumption of cold pork meats, omelets and female gender. In the 5-year-old and over group, only playing in soil was associated with sporadic S. Typhimurium infection.Conclusions
The consumption of pork and omelets, as well as playing in the dirt, were the main factors associated with infection. Children were most affected by sporadic S. Typhimurium infection. 相似文献2.
Marta Gómara Ana Isabel López-Calleja Berta María Pilar Vela Iglesia Isabel Ferrer Cerón Antonio Rezusta López María José Revillo Pinilla 《Enfermedades infecciosas y microbiología clínica》2018,36(5):296-301
Introduction
Our objective was to characterize the enzymatic β-lactam resistance in clinical Enterobacteriaceae isolates with diminished susceptibility to carbapenems from 2013 to 2014 at Hospital Universitario Miguel Servet.Material/methods
A total of 63 clinical isolates were analyzed for the presence of carbapenemases (KPC, OXA-48 and MBL), ESBLs and AmpC enzymes by combined disk methods and PCR detection of carbapenemase-encoding and beta-lactamase-encoding genes.Results
Fifteen isolates had a phenotypic test compatible with carbapenemase production; two of these were confirmed by PCR as OXA-48 producers. ESBL detection was positive in 27 isolates (43%); plasmid-mediated AmpC was detected in nine isolates (14.2%) and derepressed AmpC β-lactamase was present in 18 isolates (28%).Conclusion
During the study period, the decreased susceptibility to carbapenems in Enterobacteriaceae in our area was not due to true carbapenemases but rather to β-lactamase activity (82.5% were ESBL or AmpC producers), probably in combination with decreased permeability of the outer membrane. 相似文献3.
Yuly López Elena Parra Virginio Cepas Isabel Sanfeliú Teresa Juncosa Antonia Andreu Mariona Xercavins Josefa Pérez Sergi Sanz Andrea Vergara Jordi Bosch Sara Maria Soto 《Enfermedades infecciosas y microbiología clínica》2018,36(8):472-477
Introduction
Streptococcus agalactiae, or group B streptococci (GBS), is the main aetiological agent of early neonatal sepsis in developed countries. This microorganism belongs to the gastrointestinal tract microbiota wherefrom it can colonize the vagina and be vertically transmitted to the child either before or at birth, and subsequently cause infection in the newborn. Approximately, 50% of newborns born to women with GBS become colonized, with 1–2% developing early neonatal infection if no preventive intervention is performed. The aim of this study was to characterize and compare serotypes, virulence factors and antimicrobial resistance of GBS isolates collected from pregnant women and newborns in several hospitals in Catalonia.Methods
242 GBS strains were analyzed including 95 colonizers and 68 pathogenic strains isolated from pregnant women, and 79 strains isolated from neonates with sepsis in order to determine serotype, virulence and antimicrobial resistance.Results
Serotype distribution was different among the three groups, with serotypes Ia and II being significantly more frequent among colonizing strains (p = 0.001 and 0.012, respectively). Virulence factors bca and scpB were significantly more frequent among neonatal strains than pathogenic or colonizing strains (p = 0.0001 and 0.002, respectively). Pathogenic strains were significantly more resistant to erythromycin, clindamycin and azithromycin than their non-pathogenic counterparts.Conclusions
Taking into account that neonatal sepsis represents a significant problem on a global scale, epidemiological surveillance, antimicrobial resistance and GBS virulence at the local level could provide important knowledge about these microorganisms as well as help to improve treatment and prevent invasive infection caused by this microorganism. 相似文献4.
Saba Noor Alok Raghav Iqbal Parwez Maaz Ozair Jamal Ahmad 《Diabetes & Metabolic Syndrome: Clinical Research & Reviews》2018,12(3):417-421
Introduction
Expeditious and precise discerning of bacterial pathogens is a fundamental grail, of clinical diagnostic microbiology. Genotypic detection is a budding substitute to recognize phenotypic culture based processes in bacterial identification.Aims
We report a comparative evaluation of biochemical and genomic-based assays for exploring the commonest bacterial flora of infected diabetic foot ulcers along with clinical variables of subjects enrolled.Methods
The pathogens selected (i) Staphylococcus aureus ii) Pseudomonas aeruginosa, iii) Escherichia coli and iv) Klebsiella pneumonia, stood for the most frequent isolates of diabetic foot infection in previous studies from Northern India. Identification of these pathogens were done by conventional assays and polymerase chain reaction.Results
Of 50 specimens obtained from infected DFUs, 74% of cases were affirmative by bacteriological assays and 90% showed positivity via polymerase chain reaction (PCR). Among processed samples 44 isolates were detectable through phenotypic analysis and 65 bacteria by species-specific PCR. Thirteen samples and 21 isolates could not be scrutinized by phenotypic identification systems. The most prevalent pathogens identifiable were Klebsiella pneumonia, followed by Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli.Conclusions
We have shown that PCR-based diagnostic methods improved the identification compared to conventional methods and highlight the incorporation of PCR due to shorten turnaround time translating into improved clinical outcomes. 相似文献5.
Jailton Lobo da Costa Lima Lilian Rodrigues Alves Paula Regina Luna de Araújo Jacomé João Pacífico Bezerra Neto Maria Amélia Vieira Maciel Marcia Maria Camargo de Morais 《The Brazilian journal of infectious diseases》2018,22(2):129-136
Introduction
Biofilm production is an important mechanism for the survival of Pseudomonas aeruginosa and its relationship with antimicrobial resistance represents a challenge for patient therapeutics. P. aeruginosa is an opportunistic pathogen frequently associated to nosocomial infections, especially in imunocompromised hosts.Objectives
Analyze the phenotypic biofilm production in P. aeruginosa isolates, describe clonal profiles, and analyze quorum sensing (QS) genes and the occurrence of mutations in the LasR protein of non-biofilm producing isolates.Methods
Isolates were tested for biofilm production by measuring cells adherence to the microtiter plates. Clonal profile analysis was carried out through ERIC-PCR, QS genes were by specific PCR.Results
The results showed that 77.5% of the isolates were considered biofilm producers. The results of genotyping showed 38 distinct genetic profiles. As for the occurrence of the genes, 100% of the isolates presented the lasR, rhlI and rhlR genes, and 97.5%, presented the lasI gene. In this study nine isolates were not biofilm producers. However, all presented the QS genes. Amplicons related to genes were sequenced in three of the nine non-biofilm-producing isolates (all presenting different genetic similarity profile) and aligned to the sequences of those genes in P. aeruginosa strain PAO1 (standard biofilm-producing strain). Alignment analysis showed an insertion of three nucleotides (T, C and G) causing the addition of an amino acid valine in the sequence of the LasR protein, in position 53.Conclusion
The modeling of the resulting LasR protein showed a conformational change in its structure, suggesting that this might be the reason why these isolates are unable to produce biofilm. 相似文献6.
Pello Latasa Zamalloa Juan Carlos Sanz Moreno María Ordobás Gavín María Dolores Barranco Ordoñez Esther Insúa Marisquerena Ángel Gil de Miguel Abelardo Claudio Fernández Chávez Luis García-Comas 《Enfermedades infecciosas y microbiología clínica》2018,36(10):612-620
Introduction
Streptococcus pneumoniae is an important cause of morbidity. Vaccination is the most effective measure to prevent it. The aim of this study is to analyse the evolution of invasive pneumococcal disease (IPD).Material and methods
Observational study of IPD cases notified to the Epidemiological Surveillance Network of the Autonomous Community of Madrid between 2008 and 2015. The IPD case was defined as the disease caused by Streptococcus pneumoniae, with isolation and DNA or antigen detection, in samples from normally sterile sites. The isolated strains were sent to the Regional Public Health Laboratory for identification of the serotype. Serotypes were classified according to their inclusion in the 7-valent conjugate vaccine (PCV7), in the 13-valent vaccine, but not in the 7-valent vaccine (PCV13-additional) and not included in the 13-valent vaccine (non-PCV). The Incidence Rate Ratios (IRRs) were calculated comparing the 2011-2012 and 2013-2015 periods with the 2008-2010 period.Results
4,307 cases were reported. 86.6% were serotyped. The IRR of IPD was 0.67 and 0.67 for all serotypes; 0.43 and 0.45 for PCV7 serotypes; 0.46 and 0.25 for PCV13-additional serotypes, and 1.01 and 1.32 for non-PCV13 serotypes in the 2011-2012 and 2013-2015 periods. The incidence of serotypes 8, 9 N, 10A, 23B, 24F and serogroup 33 increased significantly in the 2013-2015 period. Serotypes 15B and 24F accounted for 24% of non-PCV13 cases in children under 5 years, serotypes 8 and 9 N for 51% in the population aged 5 to 59 years and serotypes 8 and 22F for 25% in the population aged over 59 years.Conclusions
The incidence of serotypes not included in conjugate vaccines has increased, especially in children under 5 years, but the total incidence of IPD has decreased. It is important to continue with the epidemiological and microbiological surveillance programmes to assess the effect of vaccination on the incidence of IPD. 相似文献7.
Molecular characteristics and virulence gene profiles of Staphylococcus aureus causing bloodstream infection 总被引：1，自引：0，他引：1
Xuehan Li Fang Fang Jin Zhao Ning Lou Chenglin Li Tao Huang Yirong Li 《The Brazilian journal of infectious diseases》2018,22(6):487-494
Background
The rate of methicillin-resistant Staphylococcus aureus (MRSA) among the total of S. aureus isolates decreased to 35.3% in 2017 in China. It is unclear whether the molecular characteristics of S. aureus isolates have changed as the rate decreased.Objective
This study aimed to investigate the molecular characteristics and virulence genes profile of S. aureus isolates causing bloodstream infection and analyze the correlation between the prevalence rates of the common sequence types and MRSA.Methods
A total of 112 S. aureus strains from eight hospitals of four cities, including 32 MRSA isolates, were identified and evaluated through multilocus sequence typing, spa typing, and determination of virulence genes.Results
Twenty-five STs were identified, of which ST5 (21.4%) was the most prevalent, whereas the prevalence of ST239 correlated with the rate of MRSA among all S. aureus isolates. Forty-six spa types were identified, of which t2460 (14.3%) was the most common. clfa, hla, seb, fnbA and hlb were the prevailing virulence genes. 81.3% MRSA and 45.0% methicillin-sensitive S. aureus (MSSA) isolates harbored six or more tested virulence genes. ST5-t2460, seldom noted in bloodborne S. aureus isolates in China, was the most common clone. The prevalence of harboring six or more virulence genes in ST5-t2460 and ST188-t189 were 93.8% and 8.3%, respectively.Conclusion
ST5-t2460 was the most common clone in S. aureus causing bloodstream infection followed by ST188-t189, which had never been noted in China before. Moreover, ST5-t2460 harbored more virulence genes than ST188-t189, and the prevalence of ST239 clone decreased with the proportion of MRSA among all S. aureus isolates. 相似文献8.
Luz Elena Espinosa de los Monteros-Pérez Rodolfo Norberto Jiménez-Juárez Demóstenes Gómez-Barreto Carlos Francisco Navas-Villar 《Enfermedades infecciosas y microbiología clínica》2019,37(1):41-44
Introduction
Streptococcus pneumoniae (Sp) is the main cause of community-acquired pneumonia in the elderly, hence the importance to establish the prevalence of nasopharyngeal colonization by different Sp serotypes in adults.Methods
from December 2009 to June 2010, nasopharyngeal cultures were taken from adults living in rural communities in Mexico for the isolation and serotyping of Sp by the Quellung reaction. Penicillin and ceftriaxone susceptibility tests were performed by the microdilution method.Results
two hundred and thirty-six adults over 50 years old, were included. The prevalence of colonization by Sp was 21.6%. The most frequent serotypes were 19A (21%), 6A (13%), 6B and 11A (11%). All isolates were susceptible to ceftriaxone, and 52.8% of the isolates showed penicillin minimal inhibitory concentrations ≥0.12 mg/L.Conclusion
this is the first study analyzing the nasopharyngeal colonization by Sp in adults in Mexico. Serotypes not included in any of the pneumococcal vaccines were frequently identified. 相似文献9.
María Ángeles Asencio Egea María Huertas Vaquero Rafael Carranza González Óscar Herráez Carrera Olga Redondo González Ángel Arias Arias 《Enfermedades infecciosas y microbiología clínica》2018,36(8):502-506
Introduction
We studied the trend and seasonality of community-acquired Escherichia coli resistance and quantified its correlation with the previous use of certain antibiotics.Methods
A time series study of resistant community-acquired E. coli isolates and their association with antibiotic use was conducted in a Primary Health Care Area from 2008 to 2012. A Poisson regression model was constructed to estimate the trend and seasonality of E. coli resistance.Results
A significant increasing trend in mean E. coli resistance to cephalosporins, aminoglycosides and nitrofurantoin was observed. Seasonal resistance to ciprofloxacin and amoxicillin-clavulanic acid was significantly higher in autumn-winter. There was a delay of 7, 10 and 12 months between the use of cotrimoxazole (P<0.038), fosfomycin (P<0.024) and amoxicillin-clavulanic acid (P<0.015), respectively, and the occurrence of E. coli resistance.Conclusions
An average delay of 10 months between the previous use of amoxicillin-clavulanic acid, cotrimoxazole and fosfomycin and the appearance of resistant community-acquired E. coli strains was detected. 相似文献10.
Background
In recent years, the prevalence of asthma has risen in developed countries, and its extent related to a change in our indigenous microbiota. Helicobacter pylori disappearance across the population represents a fundamental change in our human microbiota and has preceded the rise in asthma prevalence.Objective
To assess the relationship between childhood asthma and Helicobacter pylori infection.Methods
Quantitative determination of Helicobacter pylori IgG among 90 asthmatic children and 90 – age and gender – matched non-atopic, non-asthmatic healthy children was performed using ELISA in serum of all participants.Results
Helicobacter pylori IgG seropositivity was found in 25.6% of asthmatics compared to 44.4% of controls. Asthmatics showed lower median Helicobacter pylori IgG titre compared to healthy controls. We also detected a significant inverse relationship between Helicobacter pylori IgG titre and asthma severity.Conclusion
Helicobacter pylori seropositivity protects against childhood asthma and inversely correlates to its clinical and functional severity. 相似文献11.
Antonia Sánchez-Bautista Javier Coy Patricia García-Shimizu Juan Carlos Rodríguez 《Enfermedades infecciosas y microbiología clínica》2018,36(4):229-232
Introduction
Implementation of the breakpoints established in the European Committee on Antimicrobial Susceptibility Testing (EUCAST) guidelines in comparison with those of the Clinical and Laboratory Standards Institute (CLSI) means that the criteria for interpreting the susceptibility of some antimicrobials have been modified, resulting in changes in the reports of accumulated antibiotic susceptibility.Methods
The effect of applying EUCAST breakpoints in 10,359 clinical isolates of Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Staphylococcus aureus and Enterococcus spp. was analysed.Results
By applying EUCAST breakpoints, most antimicrobial susceptibility percentages did not change or changed very slightly. However, a decrease in aminoglycoside susceptibility was observed in Gram-negative bacilli, mainly for amikacin and Pseudomonas aeruginosa (23.2%), although only 5.7% were completely resistant; a notably decrease in the percentage of isolates susceptible to aztreonam was also observed. There was also a marked increase in the number of Staphylococcus aureus strains resistant to clindamycin (51.5%) and aminoglycosides (gentamicin 43.1%).Conclusions
Switching from CLSI to EUCAST criteria in some pathogens alters the percentages of resistance to several antimicrobials, and therefore the local epidemiology of the resistance. These changes should be implemented by a multidisciplinary group in order to analyse the influence of the new data on the empirical treatment protocols of each centre. 相似文献12.
Antonio Gutiérrez-Pizarraya Luis Martín-Villén Luis Alcalá-Hernández Mercedes Marín Arriaza Bárbara Balandín-Moreno César Aragón-González José Ferreres-Franco Miguel Ángel Chiveli Monleón Paloma Anguita-Alonso Emilio Bouza-Santiago José Garnacho-Montero 《Enfermedades infecciosas y microbiología clínica》2018,36(4):218-221
Introduction
Our objectives were to describe the incidence, clinical characteristics, and risk factors for Clostridium difficile infection (CDI) in critically ill patients and to determine C. difficile PCR-ribotypes.Methods
Prospective, observational study in 26 Spanish ICUs. Patients with diarrhea meeting ESCMID criteria for CDI were included. Molecular characterization of isolates was performed using PCR ribotyping.Results
Of 4258 patients admitted to the ICUs, 190 (4.5%) developed diarrhea. Only 16 patients (8.4%) were diagnosed with CDI. Ribotype 078/126 (25.0%) was the most frequently identified. The mortality rate was similar in patients with ICD compared to patients with diarrhea not caused by C. difficile (p = 0.115). Chronic renal insufficiency was identified as the only factor independently associated with the development of CDI (OR 5.87, 95% CI 1.24–27.83; p = 0.026).Conclusions
The incidence of CDI in Spanish ICUs is low. Only chronic renal insufficiency was observed to be a risk factor for CDI development. 相似文献13.
Renu Gupta Rajeev Thakur Suman Kushwaha Nupur Jalan Pumanshi Rawat Piyush Gupta Amitesh Aggarwal Meena Gupta Vikas Manchanda 《The Indian journal of tuberculosis》2018,65(1):52-56
Background
Heteroresistant Mycobacterium tuberculosis (mixture of susceptible and resistant subpopulations) is thought to be a preliminary stage to full resistance and timely detection, initiation of correct treatment is vital for successful anti tubercular therapy. The aim of this study was to detect multi drug resistant (MDR) and heteroresistant M. tuberculosis with the associated gene mutations from patients of tuberculous meningitis.Methods
A total of 197 M. tuberculosis isolates from 478 patients of TBM were isolated from July 2012 to July 2015 and subjected to drug susceptibility testing (DST) by BACTEC MGIT and Genotype MTBDR line probe assay (LPA). Heteroresistance was defined as presence of both WT and mutant genes in LPA.Results
Of 197 M. tuberculosis isolates, 11 (5.6%) were MDR, 23 (11.6%), 1 (0.5%) were mono resistant to isoniazid (INH) and rifampicin (RMP) respectively. Heteroresistance was detected in 8 (4%), 2 (1%) isolates to INH and RMP respectively. INH heteroresistant strains had WT bands with mutation band S315T1 whereas RMP heteroresistant strains had WT bands with mutation band S531L.Conclusion
The prevalence of MDR M. tuberculosis was 5.6% in TBM patients with the most common mutation being ΔWT band with S315T1 for INH and ΔWT band with S531T for RMP. MGIT DST was found to be more sensitive for detecting overall resistance in M. tuberculosis but inclusion of LPA not only reduced time for early initiation of appropriate treatment but also enabled detection of heteroresistance in 8 (4%), 2 (1%) isolates for INH and RMP respectively. 相似文献14.
15.
Milagrosa Santana Hernández Ione Ahedey Aguiar-Santana Fernando Artiles Campelo Elena Colino Gil 《Enfermedades infecciosas y microbiología clínica》2018,36(10):607-611
Objectives
To calculate the incidence of invasive pneumococcal disease (IPD) in the paediatric population of Gran Canaria (Spain), its clinical and epidemiological characteristics, serotype distribution, antibiotic resistance, and variations in these variables before and after the introduction of the PCV13 vaccine.Methods
Prospective hospital-based study including all patients (190) aged 0–14 years admitted with confirmed IPD between January 2001–May 2010 (152 cases) and June 2010–December 2016 (38 cases). Patients were divided into 3 age groups (<2 years; 2–5 years; and >5 years). Clinical symptoms were mutually-exclusively classified as meningitis, bacteraemic pneumonia, pleural effusion (PE), empyema or bacteraemia without a focus.Results
Most cases occurred in boys (59.47%), during autumn-winter (65.79%), in children aged <2 years (55.79%) and with mean age increasing from the pre-PCV13 to the post-PCV13 period (2.5 vs 3.1 years). Incidence between periods reduced by 66.4% (p < 0.001): from 13.1/100,000 to 4.4/100,000. PEs (3.9% vs 18.4%, p < 0.005) and empyemas (1.5% vs 16.7%, p = NS) increased in the post-PCV13 period whereas all other symptoms decreased, although this was not statistically significant. Vaccine serotypes (77% vs 40.6%, p = 0.000), particularly serotypes 19A (23.9% vs 12.5%) and 14 (14.2% vs 9.4%), as well as erythromycin resistance (57.2% vs 7.9%, p = 0.000) decreased in the post-PCV13 period.Conclusion
IPD incidence, vaccine serotypes and erythromycin resistance decreased in the post-PCV13 period whereas PEs increased. 相似文献16.
Irene Fuertes de Vega Carola Baliu-Piqué Jordi Bosch Mestres Andrea Vergara Gómez Xavier Vallés Mercè Alsina Gibert 《Enfermedades infecciosas y microbiología clínica》2018,36(3):165-168
Background
There are very few data available regarding risk factors associated with antibiotic resistant-Neisseria gonorrhoeae.Methods
A study was conducted on 110 samples from 101 patients with gonococcal infection, in order to describe their characteristics and compare them with the antimicrobial susceptibility profile of their samples.Results
An association was observed between resistant infections and heterosexual men, older age, concurrent sexually transmitted infection, and unsafe sexual behaviors.Conclusion
There is a need for improved data on the risk factors associated with antibiotic resistant gonococcal infection in order to identify risk groups, and to propose public health strategies to control this infection. 相似文献17.
Sara Blanco-Conde Teresa Nebreda-Mayoral Cristina Labayru-Echeverría M. Fe Brezmes-Valdivieso Ramiro López-Medrano Begoña Nogueira-González 《Enfermedades infecciosas y microbiología clínica》2018,36(10):644-647
Introduction
Lady Windermere syndrome (LWS) is a pulmonary disease caused by Mycobacterium avium complex (MAC). The objective of this study is to ascertain its frequency and characteristics in the northern area of the autonomous community of Castile and León.Methods
A retrospective study of patients with MAC isolates in respiratory samples from five public hospitals in the autonomous community over a six-year period, following the ATS/IDSA criteria. The MAC strains were identified by GenoType Mycobacterium reverse hybridisation probes or PCR-RFLP analysis of the hsp65 gene.Results
Of 183 cases of MAC identified, only five women (2.7%) aged 68.8 ± 10.7 years met LWS criteria. In three cases, MAC was isolated jointly and intermittently with other pathogens. Only one patient was treated according to ATS/IDSA criteria.Discussion
LWS remains underestimated, with affected patients representing a significant burden on healthcare resources over long periods of time. As a result, greater microbiological and therapeutic knowledge of the syndrome is needed. 相似文献18.
Zaira Moure Ariadna Rando-Segura Laura Gimferrer Gloria Roig Tomas Pumarola Virginia Rodriguez-Garrido 《Enfermedades infecciosas y microbiología clínica》2018,36(5):293-295
Introduction
Campylobacter spp. infection is one of the leading causes of foodborne diarrhoeal illness in humans worldwide. The purpose of this study was to evaluate the DiaSorin LIAISON®Campylobacter assay for human campylobacteriosis diagnosis.Methodology
A total of 645 stool samples from 640 patients suspected of having gastrointestinal infection were included. A stool culture was simultaneously performed with the DiaSorin LIAISON®Campylobacter assay to detect the presence of Campylobacter spp.Results
Taking the conventional culture to be the perfect gold standard, sensitivity and specificity rates of the DiaSorin LIAISON®Campylobacter assay were 100% and 97.7%, respectively; and 99.1% and 98.6%, respectively, when taking the culture to be the imperfect gold standard (Bayesian Model).Conclusion
This new assay might be a useful tool especially for the screening of negative results. 相似文献19.
Manuel Monsonís Cabedo Susana Rives Solá Antoni Noguera-Julian Mireia Urrea Ayala Ofelia Cruz Martinez Amadeu Gené Giralt 《Enfermedades infecciosas y microbiología clínica》2017,35(1):33-36
Introduction
The routine use of a single aerobic bottle for blood culture in pediatric patients has become commonplace, as anaerobic bacteria are not frequently involved in clinically significant infections. The aim of this study was to assess the usefulness of routinely performing anaerobic blood cultures in pediatric oncology patients.Methods
Prospective study was conducted on pediatric (<18 years) patients affected with febrile syndrome after receiving chemotherapy for hematological or solid malignancies. Samples were inoculated into pediatric aerobic and standard anaerobic bottles (BacT/Alert automatic system). Strains were considered clinically significant, or deemed as contaminants, depending on isolation circumstances and clinical criteria.Results
A total of 876 blood cultures from 228 patients were processed during the 21-month study period (January 2014 to September 2015). Baseline diagnosis included 143 solid tumors and 67/18 cases of leukemia/lymphoma. Bacterial growth was detected in 90 (10.2%) blood cultures for 95 different isolates, of which 62 (7.1%)/63 isolates were considered clinically significant. Among the latter, 38 (60.3%) microorganisms grew in both aerobic and anaerobic bottles, 18 (28.6%) only in aerobic bottles, and 7 (11.1%) only in anaerobic bottles. Gram-negative bacilli (33; 52.4%), mainly from the Enterobacteriaceae family, were the most frequently isolated microorganisms. Overall, only 3 out of 90 isolates (3.3%) were strict anaerobes (Propionibacterium acnes), and all of them were deemed contaminants.Conclusion
Strict anaerobes did not cause significant infections in febrile pediatric oncology patients, and anaerobic blood culture bottles offered no additional advantages over aerobic media. Our results suggest that routine blood cultures should be solely processed in aerobic media in this group of patients. 相似文献20.
Iker Falces-Romero Paloma Troyano-Hernáez Silvia García-Bujalance Fernando Baquero-Artigao María José Mellado-Peña Julio García-Rodríguez 《Enfermedades infecciosas y microbiología clínica》2018,36(6):357-361