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CompletedNCT03075111Updated Aug 4, 2022

Host-based Immunoassay for Differentiating Bacterial From Viral Infections (Post-marketing Study of ImmunoXpert™ - SPIRIT Study)

An observational study in Fever, sponsored by MeMed Diagnostics Ltd.. Completed at 2 sites in Israel. Open to participants aged 3 Months to 18 Years. Per ClinicalTrials.gov, last updated 2022-08-04.

Sponsored by MeMed Diagnostics Ltd. · Observational

Study type
Observational
Model
Cohort
Time perspective
Retrospective
Enrollment
3,000
Ages
3 Months to 18 Years
Sex
All
01

Study summary

This is a retrospective external field study of a novel in vitro diagnostic (IVD) assay (ImmunoXpert™).

The study will involve reviewing the medical charts of about 4500 pediatric patients that were tested using ImmunoXpert™ as part of the routine workup for acute febrile illness.

ImmunoXpert™ uses a computer algorithm to combine immunoassay measurements of three host immune proteins (TRAIL, IP-10, and CRP) present in human blood. The test is intended for use in conjunction with clinical assessments and other laboratory findings as an aid to differentiate bacterial from viral infection.

Statistical analysis will be performed to compare the diagnostic accuracy of ImmunoXpert™ with that of current practice lab testing e.g., WBC, CRP, and PCT (whichever were taken as part of routine care) and clinical suspicion at time of requisition.

02

Conditions studied

  • Fever

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03

In context

Fever

438 studies on the registry are indexed under Fever; 55 are open to participants now.

This study's enrollment of 3,000 is above the median of 408 across 140 observational studies indexed under Fever.

Browse Fever studies →

Lead sponsor

MeMed Diagnostics Ltd. is the lead sponsor of 13 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
3 Months to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

  1. Patients with an acute bacterial infection
  2. Patients with an acute viral infection
  3. Patients with an acute co-infection (bacterial and viral)
  4. Patients with an undetermined disease etiology

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patients aged 3 month to 18 years that were admitted due to acute febrile illness, and ImmunoDx test was taken as part of their workup.

The febrile illness should also fulfill the following criteria:

  • The patient had a peak temperature ≥38°C (AND)
  • Symptoms initiated ≤ 7 days before sampling (AND)
  • A retrospective diagnosis of bacterial or viral or mixed infection was anonymously determined by a panel of three independent senior pediatricians.

The non-infectious disease control group will include:

  • A retrospective diagnosis of a non-infectious disease was anonymously determined by a panel of three independent senior pediatricians physicians.
  • Patients with a non-infectious disease ( and ImmunoDx test was wrongly taken)

Exclusion criteria

Exclusion Criteria:

  • Samples from patients who had one or more of the following criteria will be excluded from the study:
  • Another infection episode during the last 3 weeks before sampling
  • Congenital immune deficiency (CID)
  • A proven or suspected -1, , infection
  • Active hematological
  • Current treatment with immune-suppressive or immune-modulating therapies including without limitations:
  • Use of high dose >1 mg/kg/day prednisone or equivalent in the last two weeks
  • Monoclonal antibody administration
  • Intravenous immunoglobulin (IVIG)
  • Other illnesses that affect and/or quality of life
  • Suspicion of gastrointestinal infection
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

05

Study design

Observational model
Cohort
Time perspective
Retrospective
Enrollment
3,000 participants (actual)
Patient registry
No
Biospecimen retention
None retained

Interventions

  • Diagnostic testImmunoXpert

    Host based immune response test distinguishing viral versus bacterial infection

06

What researchers measure

Primary outcomes

  1. The sensitivity and specificity of a host-response based diagnostics in differentiating between bacterial and viral etiology of patients with an acute febrile disease.

    Time frame: 0-7 days after the initiation of symptoms

Secondary outcomes

  1. The sensitivity and specificity of a host-response based diagnostics in differentiating between infectious and non-infectious disease etiology

    Time frame: 0-7 days after the initiation of symptoms

07

Study locations

2 sites
  • Hillel Yaffe Medical center
    Hadera, Israel
  • Bnei Zion medical center
    Haifa, 31048, Israel
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Nov 2015 to primary completion in Feb 2019, 39 months.

How these figures are worked out, and which studies are left out of them.

Registered
Mar 6, 2017
First posted
Mar 9, 2017
StartActual
Nov 7, 2015
Primary completionActual
Feb 2019
CompletionActual
Jul 5, 2022
Last update
Aug 4, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Aug 4, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03075111
Lead sponsor
MeMed Diagnostics Ltd.
Responsible party
Sponsor
First posted
Mar 9, 2017
Start date
Nov 7, 2015
Primary completion
Feb 2019
Completion
Jul 5, 2022
Last update
Aug 4, 2022

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2022. You cannot join it, but the record below documents what was studied.

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