scholarly journals Characteristics of Salmonella From Chinese Native Chicken Breeds Fed on Conventional or Antibiotic-Free Diets

2021 ◽  
Vol 8 ◽  
Author(s):  
Lulu Cui ◽  
Qingxiao Liu ◽  
Zhiyu Jiang ◽  
Yan Song ◽  
Shoujing Yi ◽  
...  
Keyword(s):  
Epidemiological Data ◽  
Antibiotic Use ◽  
Resistance Rate ◽  
High Rate ◽  
Food Borne ◽  
Native Chicken ◽  
Chicken Breeds ◽  
Free Feeding ◽  
Resistance Spectrum ◽  
Epidemiological Characteristics

Salmonella is a common food-borne Gram-negative pathogen with multiple serotypes. Pullorum disease, caused by Salmonella Pullorum, seriously threatens the poultry industry. Many previous studies were focused on the epidemiological characteristics of Salmonella infections in conventional antibiotic use poultry. However, little is known about Salmonella infections in chicken flocks fed on antibiotic-free diets. Herein, we investigated and compared Salmonella infections in three Chinese native breeders fed on antibiotic-free diets, including the Luhua, Langya, and Qingjiaoma chickens, and one conventional breeder, the Bairi chicken, via analyzing 360 dead embryos in 2019. The results showed that the main Salmonella serotypes detected in a total of 155 isolates were S. Pullorum (82.6%) and S. Enteritidis (17.4%). Coinfection with two serotypes of Salmonella was specifically found in Bairi chicken. The sequence type (ST) in S. Pullorum was ST92 (n = 96) and ST2151 (n = 32), whereas only ST11 (n = 27) was found in S. Enteritidis. The Salmonella isolates from three breeder flocks fed on antibiotic-free diets exhibited phenotypic heterogeneity with a great variety of drug resistance spectrum. Most of the isolates among three chicken breeds Luhua (64.9%, 50/77), Langya (60%, 12/20) and Qingjiaoma (58.3%, 7/12) fed on antibiotic-free diets were resistant to only one antibiotic (erythromycin), whereas the rate of resistance to one antibiotic in conventional Bairi chicken isolates was only 4.3% (2/46). The multidrug-resistance rate in Salmonella isolates from layer flocks fed on antibiotic-free diets (20.2%, 22/109) was significantly (P < 0.0001) lower than that from chickens fed on conventional diets (93.5%, 43/46). However, high rate of resistance to erythromycin (97.4%~100%) and streptomycin (26%~41.7%) were also found among three breeder flocks fed on antibiotic-free diets, indicating resistance to these antibiotics likely spread before antibiotic-free feeding in poultry farms. The findings of this study supplement the epidemiological data of salmonellosis and provide an example of the characteristics of Salmonella in the chicken flocks without direct antibiotic selective pressure.

scholarly journals Epidemiological Characterization of Drug Resistance amongMycobacterium tuberculosisIsolated from Patients in Northeast of Iran during 2012-2013

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Ashraf Tavanaee Sani ◽  
Abolfazl Shakiba ◽  
Maryam Salehi ◽  
Hamid Reza Bahrami Taghanaki ◽  
Seiedeh Fatemeh Ayati Fard ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Mycobacterium Tuberculosis ◽  
Previous History ◽  
Epidemiological Data ◽  
Drug Susceptibility Testing ◽  
Resistance Rate ◽  
High Rate ◽  
Main Concern ◽  
Cross Sectional ◽  
Old Patients

Introduction. Tuberculosis is still one of the most important health problems in developing countries and increasing drug resistance is the main concern for its treatment. This study was designed to characterize the drug resistantMycobacterium tuberculosisisolated from patients suffering from pulmonary tuberculosis in northeast of Iran.Method. In this cross-sectional study during 2012-2013, drug susceptibility testing was performed onMycobacterium tuberculosisisolated in northeast of Iran using proportional method. Epidemiological data concerning these strains were also analyzed.Results. Among 125 studied isolates, 25 mycobacteria (20%) were diagnosed as nontuberculosis mycobacteria. Among the remaining 100Mycobacterium tuberculosisisolates, the resistance rates were 7%, 7%, 3%, and 9% against isoniazid, rifampin, ethambutol, and streptomycin, respectively. Four isolates were resistant against both isoniazid and rifampin (MDR tuberculosis). The highest resistance rate was observed among 15–45-year-old patients. The MDR tuberculosis was much more prevalent among those who had previous history of treatment.Conclusion. Considering these findings, DOTS strategy should be emphasized and promptly used in order to prevent further resistance. Regarding the high rate of nontuberculosis mycobacteria, it is recommended that confirmatory tests were performed before any therapeutic decision.

scholarly journals Clinical predictors of response to immunomodulators for multiple sclerosis

2012 ◽  
Vol 70 (1) ◽  
pp. 12-16 ◽  
Author(s):  
Guilherme Sciascia do Olival ◽  
Leonardo Ciciarelli Pereira Lima ◽  
Gabriel Paiva Silva Lima ◽  
Charles Peter Tilbery
Keyword(s):  
Multiple Sclerosis ◽  
Epidemiological Data ◽  
High Rate ◽  
Therapeutic Approaches ◽  
Clinical Predictors ◽  
Clinical Criteria ◽  
Predictors Of Response ◽  
Before And After ◽  
Patient Groups ◽  
Epidemiological Characteristics

OBJECTIVES: To determine, based on clinical criteria, the proportion of multiple sclerosis (MS) patients responsive to immunomodulators (RI) and nonresponsive to immunomodulators (NRI), and to ascertain whether clinical and epidemiological data differs between RI and NRI patient groups. METHODS: Patients were assessed on rate of exarcerbations per year, for the period before and after commencement of treatment. The RI and NRI groups were compared for several clinical and epidemiological characteristics. DISCUSSION AND CONCLUSION: A total of 31.4% of the patients were nonresponders to the immunomodulatory treatment. The main predictors of immunomodulatory response were early diagnostic and commencement of therapy and high rate of annual exacerbations prior to treatment. Given the arsenal of medication options available for MS management, screening potential candidates for different therapeutic approaches are critical to optimize evolution of patients with the disease.

Staphylococcus aureus nasal colonization among Vietnamese adults: prevalence, risk factors and antibiotic susceptibility profile

MedPharmRes ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 21-31
Author(s):  
Nguyen Phan ◽  
Hien Pham ◽  
Thuc Nguyen ◽  
Hoai Nguyen
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Antibiotic Susceptibility ◽  
Nasal Carriage ◽  
Resistance Rate ◽  
High Rate ◽  
Weight History ◽  
Potential Risk Factors ◽  
History Of ◽  
Vietnamese Community

Staphylococcus aureus (S. aureus) has long been recognized as an important human pathogen causing many severe diseases. It is also a part of human normal flora with its ecological niche in the human anterior nares. This study focused on screening S. aureus nasal carriage in community and its relationship to human physiological and pathological factors which have not been studied in Vietnam previously. Two hundred and five volunteers in Ho Chi Minh City from 18 to 35 and over 59 years old both male and female participated in the study. Result showed that the prevalence of S. aureus nasal carriage in southern Vietnamese community was relatively low, only 11.2% (23/205), much lower than that in other international reports on human S. aureus. In addition, nasal carriage of the older age group (> 59 years old, 13.7%) was higher than that of younger age (18-35 years old, 10.4%). Other potential risk factors such as gender, career, height, weight, history of antibiotic usage, daily nasal wash, use of nasal medication sprays, acne problems, smoking and nasal problems showed no significant impact on S. aureus carriage. The obtained S. aureus nasal isolates were all sensitive to vancomycin. Lincomycin and tetracycline had low resistance rate with 4.3 % and 17.4 %, respectively. However, the isolates showed particularly high rate of multidrug resistance (54.2%) In summary, our data provided researchers an overview on S. aureus nasal carriage and antibiotic susceptibility profile of the community- isolated S. aureus in Vietnam. This would serve as valuable information on assessing risk of community-acquired S. aureus infections.

A retrospective audit of antibiotic prescriptions in a Lebanese Hospital

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Mohamad Ibrahim ◽  
Zeinab Bazzi
Keyword(s):  
Epidemiological Data ◽  
Antibiotic Use ◽  
Antibiotic Prescribing ◽  
Team Approach ◽  
Strong Correlations ◽  
Prescribing Practices ◽  
Antimicrobial Drugs ◽  
Stewardship Program ◽  
Retrospective Audit ◽  
Attending Physician

Despite the frequent alarms that have been published about the adverse effects of antibiotic use and misuse, physicians prescribe to patients approximately fifty percent of unnecessary antimicrobials. In an attempt to decrease the emergence of antimicrobial resistance and increase awareness, a team approach is required to address this prescribing phenomenon in a feasible manner. A retrospective study was done at a one-hundred-forty-bed hospital with a representative sample size of 368 patients. Patient data was collected and analyzed by a stewardship team. The overall antibiotic inappropriate rate was 45.8%, which is relatively high and consistent with the findings of other studies mentioned in the literature. This study aimed to provide baseline epidemiological data on the use of antibiotics in a Lebanese hospital and has revealed several notable patterns of antibiotic prescribing practices among Lebanese physicians such as the use of antimicrobial drugs example penicillin was consistently high. Strong correlations were identified between the type of attending physician and antibiotic appropriateness. These findings will be important in constructing an antimicrobial stewardship program to reduce antibiotic misuse.

scholarly journals Neisseria meningitidis carriage and risk factors among teenagers in Suizhou city in China

2020 ◽  
Vol 148 ◽  
Author(s):  
Fei He ◽  
Hong mei Yang ◽  
Guo ming Li ◽  
Bing qing Zhu ◽  
Yating Zhang ◽  
...  
Keyword(s):  
Risk Factors ◽  
Population Density ◽  
Neisseria Meningitidis ◽  
Old Age ◽  
Age Groups ◽  
Significant Risk ◽  
Epidemiological Data ◽  
Significant Risk Factor ◽  
Antibiotic Use ◽  
Carriage Rate

Abstract Teenagers are important carriers of Neisseria meningitidis, which is a leading cause of invasive meningococcal disease. In China, the carriage rate and risk factors among teenagers are unclear. The present study presents a retrospective analysis of epidemiological data for N. meningitidis carriage from 2013 to 2017 in Suizhou city, China. The carriage rates were 3.26%, 2.22%, 3.33%, 3.53% and 9.88% for 2013, 2014, 2015, 2016 and 2017, respectively. From 2014 to 2017, the carriage rate in the 15- to 19-year-old age group (teenagers) was the highest and significantly higher than that in remain age groups. Subsequently, a larger scale survey (December 2017) for carriage rate and relative risk factors (population density, time spent in the classroom, gender and antibiotics use) were investigated on the teenagers (15- to 19-year-old age) at the same school. The carriage rate was still high at 33.48% (223/663) and varied greatly from 6.56% to 52.94% in a different class. Population density of the classroom was found to be a significant risk factor for carriage, and 1.4 persons/m2 is recommended as the maximum classroom density. Further, higher male gender ratio and more time spent in the classroom were also significantly associated with higher carriage. Finally, antibiotic use was associated with a significantly lower carriage rate. All the results imply that attention should be paid to the teenagers and various measures can be taken to reduce the N. meningitidis carriage, to prevent and control the outbreak of IMD.

scholarly journals Animal and Human Multidrug-Resistant, Cephalosporin-ResistantSalmonella Isolates Expressing a Plasmid-Mediated CMY-2 AmpC β-Lactamase

2000 ◽  
Vol 44 (10) ◽  
pp. 2777-2783 ◽  
Author(s):  
P. L. Winokur ◽  
A. Brueggemann ◽  
D. L. DeSalvo ◽  
L. Hoffmann ◽  
M. D. Apley ◽  
...  
Keyword(s):  
Antimicrobial Resistance ◽  
Plasmid Dna ◽  
Antibiotic Use ◽  
Multidrug Resistant ◽  
Geographic Region ◽  
Chromosomal Dna ◽  
Important Food ◽  
Food Borne ◽  
Clonal Spread ◽  
Resistance Rates

ABSTRACT Salmonella spp. are important food-borne pathogens that are demonstrating increasing antimicrobial resistance rates in isolates obtained from food animals and humans. In this study, 10 multidrug-resistant, cephalosporin-resistant Salmonellaisolates from bovine, porcine, and human sources from a single geographic region were identified. All isolates demonstrated resistance to cephamycins and extended-spectrum cephalosporins as well as tetracycline, chloramphenicol, streptomycin, and sulfisoxazole. Molecular epidemiological analyses revealed eight distinct chromosomal DNA patterns, suggesting that clonal spread could not entirely explain the distribution of this antimicrobial resistance phenotype. However, all isolates encoded an AmpC-like β-lactamase, CMY-2. Eight isolates contained a large nonconjugative plasmid that could transformEscherichia coli. Transformants coexpressed cephalosporin, tetracycline, chloramphenicol, streptomycin, and sulfisoxazole resistances. Plasmid DNA revealed highly related restriction fragments though plasmids appeared to have undergone some evolution over time. Multidrug-resistant, cephalosporin-resistant Salmonellaspp. present significant therapeutic problems in animal and human health care and raise further questions about the association between antimicrobial resistance, antibiotic use in animals, and transfer of multidrug-resistant Salmonella spp. between animals and man.

​​Differential Disease Resistance of Indian Native Chicken Breeds to Experimental P. multocida Infection

2021 ◽  
Author(s):  
T.R. Kannaki ◽  
E. Priyanka ◽  
M. Abhilash ◽  
Santosh Haunshi
Keyword(s):  
Experimental Infection ◽  
Pasteurella Multocida ◽  
Clinical Signs ◽  
Mortality Rates ◽  
Susceptibility Pattern ◽  
Intranasal Route ◽  
Bacterial Diseases ◽  
Death Time ◽  
Native Chicken ◽  
Chicken Breeds

Background: Native chicken breeds are considered more disease tolerant than exotic chicken breeds especially for the bacterial diseases. Aseel, Ghagus and Vanaraja chicken breeds/ variety were evaluated for the disease tolerance/susceptibility pattern after experimental infection with P. multocida A:1 isolate. Methods: A total of 72 birds of three breeds viz., Aseel, Ghagus and Vanaraja (n=24 each) were divided into three groups. The birds were inoculated with 2.5x106 CFU/ml of virulent Pasteurella multocida A:1 isolate through intraperitoneal (I/P) and intranasal (I/N) routes at 12 weeks of age. Clinical signs, morbidity, mortality rates and lesions were observed in the infected birds. Result: The mortality rates were 83.3% in Assel breed against 100% in both Ghagus and Vanaraja breed in intraperitoneally infected groups. Upon intranasal infection, the mortality was 83.3% in Assel and Vanaraja breed against 100% in Ghagus breed. Aseel birds showed significantly better survivability and longer death time than Ghagus breed upon experimental infection with Pasteureall multocida A:1 isolate. Vanaraja breed showed tolerance comparable to Aseel in experimental infection via intranasal route.

scholarly journals Carbapenemase Production and Epidemiological Characteristics of Carbapenem-Resistant Klebsiella pneumoniae in Western Chongqing, China

2022 ◽  
Vol 11 ◽  
Author(s):  
Wan Huang ◽  
Jisheng Zhang ◽  
Lingyi Zeng ◽  
Chengru Yang ◽  
Lining Yin ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Klebsiella Pneumoniae ◽  
Virulence Genes ◽  
Resistance Rate ◽  
Molecular Characteristics ◽  
Chain Reaction ◽  
Detection Rates ◽  
Carbapenem Resistant ◽  
Polymerase Chain ◽  
Epidemiological Characteristics

BackgroundThis study aimed to determine the molecular characteristics of carbapenem-resistant Klebsiella pneumoniae (CRKP) isolates in a hospital in western Chongqing, southwestern China.MethodsA total of 127 unique CRKP isolates were collected from the Yongchuan Hospital of Chongqing Medical University, identified using a VITEK-2 compact system, and subjected to microbroth dilution to determine the minimal inhibitory concentration. Enterobacteriaceae intergenic repeat consensus polymerase chain reaction and multilocus sequence typing were used to analyze the homology among the isolates. Genetic information, including resistance and virulence genes, was assessed using polymerase chain reaction. The genomic features of the CRKP carrying gene blaKPC-2 were detected using whole-genome sequencing.ResultsST11 was the dominant sequence type in the homology comparison. The resistance rate to ceftazidime-avibactam in children was much higher than that in adults as was the detection rate of the resistance gene blaNDM (p < 0.0001). Virulence genes such as mrkD (97.6%), uge (96.9%), kpn (96.9%), and fim-H (84.3%) had high detection rates. IncF (57.5%) was the major replicon plasmid detected, and sequencing showed that the CRKP063 genome contained two plasmids. The plasmid carrying blaKPC-2, which mediates carbapenem resistance, was located on the 359,625 base pair plasmid IncFII, together with virulence factors, plasmid replication protein (rep B), stabilizing protein (par A), and type IV secretion system (T4SS) proteins that mediate plasmid conjugation transfer.ConclusionOur study aids in understanding the prevalence of CRKP in this hospital and the significant differences between children and adults, thus providing new ideas for clinical empirical use of antibiotics.

scholarly journals Clinical profile and outcome of pediatric bacterial meningitis: a prospective study from tertiary institute in Northern India

2018 ◽  
Vol 6 (8) ◽  
pp. 2739
Author(s):  
Ashok Garg ◽  
Ashish Sharma ◽  
Sandhya Kumari ◽  
Ambuj Shandil
Keyword(s):  
Bacterial Meningitis ◽  
Group B Streptococcus ◽  
Antibiotic Use ◽  
Latex Agglutination ◽  
High Rate ◽  
Acute Bacterial Meningitis ◽  
Age Group ◽  
Cell Counts ◽  
Acute Complications ◽  
Group B

Background: Meningitis is one of the fatal infections occurring in infants and older children. In acute bacterial meningitis (ABM), inflammation of the leptomeninges is triggered by bacteria present in the subarachnoid space. ABM is associated with a high rate of acute complications and long-term morbidity. Aim of our study was to determine the incidence, etiological profile and complications of acute bacterial meningitis amongst children belonging to one month to five years of age.Methods: The present study was conducted over a period of one year and diagnosis of meningitis was made on basis of history, examination and laboratory investigations. Clinical features were recorded on case sheet. Lumbar puncture was done, and CSF was sent for biochemical analysis, cell counts, staining, culture and latex agglutination test (LAT).Results: Out of total 1560 admitted cases (1 month to 5years age group), 160 cases were suspected with meningitis while 57 cases were confirmed to have ABM. Most (59.6%) cases belonged to 3 months to 1-year age group and males outnumbered the females by a ratio of 2:1. Group B Streptococcus (45.6%) was most common pathogen in 45.6% cases followed by Streptococcus pneumoniae (21%) and Hemophilus influenzae (10.52%). Seizures (45%) and increased ICP (28%) were main acute complications observed during hospitalization while hemiparesis 9.6%, monoparesis 4.8%, seizures 38%, vision and hearing deficits were the sequelae observed on follow up examination. These complications were predominantly contributed by S. pneumoniae and H. Influenzae.Conclusions: The incidence of ABM is still high and Group B streptococcus is main pathogen even in post neonatal period. The complications of ABM are markedly higher in cases of S. pneumoniae, H. Influenzae meningitis in comparison to Group B streptococcus meningitis. Formulating standard protocols for management of ABM and rational antibiotic use to prevent resistance is the need of hour.

scholarly journals Molecular epidemiology and antimicrobial resistance of group A streptococcus recovered from patients in Beijing, China

2020 ◽  
Author(s):  
Hongxin Li ◽  
Lin Zhou ◽  
Yong Zhao ◽  
Lijuan Ma ◽  
Xiaoyan Liu ◽  
...  
Keyword(s):  
Antimicrobial Resistance ◽  
Group A Streptococcus ◽  
Resistance Rate ◽  
Gene Profiling ◽  
Epidemiological Surveillance ◽  
Erythromycin Resistance ◽  
Children's Hospital ◽  
Children’S Hospital ◽  
Group A ◽  
Epidemiological Characteristics

Abstract Background: Group A streptococcus (GAS) is an important human pathogen responsible for a broad range of infections. Epidemiological surveillance has been crucial to detect changes in the geographical and temporal variation of the disease pattern. The objective of this study was to investigate the molecular epidemiological characteristics and antimicrobial resistance of GAS isolates from patients in Children’s Hospital in Beijing. Methods: From 2016 to 2017, pharyngeal swab samples were collected from the outpatients in Children’s Hospital, Capital Institute of Pediatrics, who were diagnosed with scarlet fever. Antimicrobial susceptibility test was performed according to the distribution of conventional antibiotics and Clinical and Laboratory Standards Institute (CLSI) recommendations. The distribution of the macrolide-resistance genes ( ermB, ermA, mefA ), emm (M protein-coding gene) typing, and superantigens (SAg) gene profiling were examined by polymerase chain reaction (PCR). Results: A total of 297 GAS isolates were collected. The susceptibility of the isolates to penicillin, ceftriaxone, and levofloxacin was 100%. The resistance rate to erythromycin and clindamycin was 98.3% and 96.6%, respectively. The dominant emm types were emm12 (65.32%), emm1 (27.61%), emm75 (2.69%), and emm89 (1.35%). Of the 297 isolates, 290 (97.64%) carried the ermB gene, and 5 (1.68%) carried the mefA gene, while none carried the ermA gene. The most common superantigen genes identified from GAS isolates were smeZ (96.97%) , speC (92.59%), speG (91.58%), ssa (85.52%), speI (54.55%), speH (52.19%), and speA (34.34%). Isolates with the genotype emm1 possessed speA , speC , speG , speJ , speM , ssa , and smeZ , while emm12 possessed speC , speG , speH , speI , speM , ssa , and smeZ superantigens. Conclusions: The prevalent strain of GAS isolates in Beijing has a high resistance rate to macrolides; however, penicillin can still be the preferred antibiotic for treatment. Erythromycin resistance was predominantly mediated by ermB. The common emm types were emm12 and emm1. There was a correlation between emm and the superantigen gene. Thus, long-term monitoring and investigation of the emm types and superantigen genes of GAS prevalence are imperative.

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