T2Bacteria® Negative De-escalation

67-year-old female admitted for reduced intensity conditioning followed by Stem Cell transplant for acute myelogenous leukemia.

Discussion

Patients undergoing cytotoxic chemotherapy and hematopoietic stem-cell transplantation (HSCT) are at high risk for infection, particularly during the period of neutropenia and are often prescribed antibiotic prophylaxis with fluroquinolones. The majority of patients who develop fever during neutropenia have no identifiable site of infection and no positive culture results. IDSA guidelines recommend that every patient with fever and neutropenia receive empiric antibiotic therapy with an antipseudomonal beta lactam urgently after presentation, because infection may progress rapidly.1

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Thrombus in Left Popliteal Artery

Patient presented with acute onset of pain in his left lower extremity

Discussion

Rapid molecular diagnostics such as T2MR technology may help with prognosis of invasive candidiasis. The T2Candida Panel was utilized upon follow up to assess the clearance of candidemia along with clinical symptoms.

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Patient Receiving Cancer Treatment

Neutropenic Fever & P. aeruginosa Bloodstream Infection

A 23-year-old female with a history of acute myeloid leukemia and recent haploidentical stem cell transplant, cytokine release syndrome and severe mucositis following receipt of post-transplant cyclophosphamide therapy.

Discussion:

Upon admission, the patient was initially given cefepime for the treatment of febrile neutropenia. Due to the patient’s history of AML and neutropenia, she was at risk for organisms such as P. aeruginosa in addition to other common causes of febrile neutropenia such as Enterobacteriaceae.

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Hospital Ward with empty beds

Pulmonary Edema and Suspected Pneumonia

Patient had a history of multiple myeloma, prostate cancer and CHF.

Discussion

This case highlights not only T2Bacteria’s benefit of rapid identification but also the ability to detect the causative organism in the presence of antibiotics as this patient had received the dose of vancomycin before the T2Bacteria was drawn.

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IV Vial

Utilizing a Negative T2Bacteria Result

81 year old female admitted with a one-day history of fever, rigors, weakness, and confusion. Blood and urine cultures were ordered as well as IV antibiotics.

Discussion/Decision Making Based on T2Bacteria Result 

At this point in time, the hospital has not adopted T2Bacteria, however, another hospital in their system has. Given the high likelihood that the repeat BCx would be negative, they were asked to draw a blood sample on the day the patient was ready for discharge and send it to the institution that currently utilized the T2Bacteria Panel.

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Blood Pressure Monitor

Candida parapsilosis bloodstream infection1

The T2Candida Panel was used to assess for the presence of disease and continuation of antifungal therapy, despite negative blood cultures.

Discussion


Rapid molecular diagnostics such as T2MR technology may help with prognosis of invasive candidiasis. For our case, the T2Candida Panel was utilized upon follow up to assess clearance of candidemia along with clinical symptoms.

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Elderly Man in Hospital Bed

Urinary Tract Infection: Suspected Sepsis

83-year-old male presented to the emergency department with urinary retention.

Had the T2Bacteria test been performed and result been reported immediately after collection, the patient could have been initiated on effective empiric therapy over 24 hours sooner, and P. aeruginosa bacteremia identified over two days earlier.

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S. aureus bacteria

Community Acquired Pneumonia

Patient presented to the emergency department with shortness of breath, cough, fever and chills.

A rapid T2Bacteria result could have allowed for more informed treatment decisions, including the initiation of earlier effective therapy over 30 hours sooner.

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Suspected urinary tract infection

91-year-old female presented to the emergency department with several day history of fever, chills, and nausea/vomiting.

Had the T2Bacteria® test been performed and result been reported immediately after collection, the patient could have potentially avoided premature discharge and readmission.

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Deep-seated invasive candidiasis in a liver recipient

Patient with insulin-dependent diabetes mellitus, primary sclerosing cholangitis, multiple bacteremic episodes and recent liver transplant was admitted.

In this case, T2Candida® results could have permitted earlier focused therapy and aided with the diagnosis of invasive Candida infection and lead to appropriate antifungal therapy. Unfortunately, the T2Direct Diagnostics results were not in clinical use at the time and not obtained until after patient death.

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  • According to the CDC, of the 154 million prescriptions for antibiotics written in doctors' offices and emergency departments each year, 30% are unnecessary.12