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Fatal Community-acquired bloodstream infection caused by Klebsiella variicola:A case report

World Journal of Clinical Cases 2022年第8期10卷 2474-2483页

作者： Da-Li Long Yu-Hui Wang Jin-Long Wang Si-Jie Mu Li Chen Xian-Qing Shi Jian-Quan Li Intensive Care Unit Guizhou Provincial People's HospitalGuiyang 550000Guizhou ProvinceChina NHC Key Laboratory of Pulmonary Immune Related Disease Guizhou Provincial People's HospitalGuiyang 550000Guizhou ProvinceChina

BACKGROUND Klebsiella pneumoniae(K.pneumoniae)is an infective microorganism of worldwide concern because of its varied manifestations and life-threatening potential.Genetic analyses have revealed that subspecies of K.pneumoniae exhibit higher virulence and mortality.However,infections with Klebsiella subspecies are often misdiagnosed and underestimated in the clinic because of difficulties in distinguishing K.pneumoniae from its subspecies using routine tests.This case study reports the rapid and fatal effects of K.pneumoniae subspecies.CASE SUMMARY A 52-year-old male patient was febrile and admitted to hospital.Examinations excluded viral and fungal causes along with mycoplasma/chlamydia and parasitic infections.Bacterial cultures revealed blood-borne K.pneumoniae sensitive to carbapenem antibiotics,although corresponding treatment failed to improve the patient’s symptoms.His condition worsened and death occurred within 72 h of symptom onset from sepsis shock.Application of the PMseq-DNA Pro high throughput gene detection assay was implemented with results obtained after death showing a mixed infection of K.pneumoniae and Klebsiella variicola(K.variicola).Clinical evidence suggested that K.variicola rather than K.pneumoniae contributed to the patient’s poor prognosis.CONCLUSION This is the first case report to show patient death from Klebsiella subspecies infection within a short period of time.This case provides a timely reminder of the clinical hazards posed by Klebsiella subspecies and highlights the limitations of classical laboratory methods in guiding anti-infective therapies for complex cases.Moreover,this report serves as reference for physicians diagnosing similar diseases and provides a recommendation to employ early genetic detection to aid patient diagnosis and management.

关键词： Community-acquired bloodstream infection Mixed infection Klebsiella variicola Klebsiella pneumoniae High throughput gene detection Case report

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Development and validation of an emergency bloodstream infection score for predicting in-hospital mortality in patients with Community-acquired bloodstream infections

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World Journal of Emergency Medicine 2023年第4期14卷 280-286页

作者： Xinlei Wang Yao Sun Xiaoyu Ni Shu Zhang Department of Emergency West China HospitalSichuan UniversityChengdu 610041Chiha

BACKGROUND:Community-acquired bloodstream infections(CABSIs)are common in the emergency departments,and some progress to sepsis and even lead to death.However,limited information is available regarding the prediction of patients with high risk of death.METHODS:The Emergency bloodstream infection Score(EBS)for CABSIs was developed to visualize the output of a logistic regression model and was validated by the area under the curve(AUC).The Mortality in Emergency Department Sepsis(MEDS),Pitt Bacteremia Score(PBS),Sequential Organ Failure Assessment(SOFA),quick Sequential Organ Failure Assessment(qSOFA),Charlson Comorbidity Index(CCI),and McCabe–Jackson Comorbid Classification(MJCC)for patients with CABSIs were computed to compare them with EBS in terms of the AUC and decision curve analysis(DCA).The net reclassification improvement(NRI)index and integrated discrimination improvement(IDI)index were compared between the SOFA and EBS.RESULTS:A total of 547 patients with CABSIs were included.The AUC(0.853)of the EBS was larger than those of the MEDS,PBS,SOFA,and qSOFA(all P<0.001).The NRI index of EBS in predicting the in-hospital mortality of CABSIs patients was 0.368(P=0.04),and the IDI index was 0.079(P=0.03).DCA showed that when the threshold probability was<0.1,the net benefit of the EBS model was higher than those of the other models.CONCLUSION:The EBS prognostic models were better than the SOFA,qSOFA,MEDS,and PBS models in predicting the in-hospital mortality of patients with CABSIs.

关键词： Community-acquired bloodstream infection Risk factors In-hospital mortality Emergency department

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