Skip directly to site content
Are You Still There?
Due to inactivity, you will be signed out in two minutes unless you click 'Continue'.

Are you still there?

Due to inactivity, you will be signed out in two minutes unless
you click 'Continue'.

Panel:   Custom 2024-8091 (Custom)
AR Bank # 0023 Citrobacter freundii
Study ID: BIT-23

Biosample Accession #: SAMN04014864

mCIM Result: Negative    
MLST: 267(Pasteur)


Panel:  Enterobacterales Carbapenem Breakpoint (BIT)  |  Custom 2024-8091 (Custom)


MIC (μg/ml) Results and Interpretation
Drug MIC (μg/ml) INT
Amikacin 2S
Ampicillin 32R
Ampicillin/sulbactam 1 68R
Aztreonam <=2S
Aztreonam/avibactam 10.06---
Cefazolin >8R
Cefepime <=0.5S
Cefepime/zidebactam 20.06---
Cefotaxime <=1S
Cefoxitin >16R
Ceftazidime <=1S
Ceftolozane/tazobactam 1<=0.5S
Ceftriaxone <=1S
Ciprofloxacin <=0.25S
Colistin 51I
Doripenem <=0.12S
Eravacycline 30.25S
Ertapenem <=0.12S
Gentamicin 0.5S
Imipenem <=0.5S
Imipenem/relebactam 10.12S
Imipenem+chelators 41---
Levofloxacin 1I
Meropenem <=0.12S
Meropenem-vaborbactam 1<=0.5S
Piperacillin/tazobactam 18S
Tetracycline 4S
Tigecycline 31S
Tobramycin 0.5S
Trimethoprim/sulfamethoxazole 1<=0.25S
S – I –R Interpretation (INT) derived from CLSI 2022 M100 S32
1 Reflects MIC of first component
2 Cefepime to zidebactam ratio (1:1)
3 Based on FDA break points
4 Screen for metallo-beta-lactamase production [Rasheed et al. Emerging Infectious Diseases. 2013. 19(6):870-878]
5 Clinical and PK/PD data demonstrate colistin has limited clinical efficacy, even if an intermediate result is obtained. Alternative agents are strongly preferred. Colistin should be used in combination with one or more active antimicrobial agents. Consultation with an infectious disease specialist is recommended.
6 The MIC Interpretation has been defaulted to "Resistant" due to known intrinsic resistance for this bacterial species in the wild-type population. [See Appendix B, Intrinsic Resistance; CLSI M100]
Device manufacturers and users of FDA cleared devices shall consult the FDA’s Antibacterial Susceptibility Test Interpretive Criteria       website for breakpoints recognized or recommended by FDA, and for information regarding FDA exceptions or additions to the applicable, recognized consensus standard.
Molecular Mechanisms of Resistance
CategoryGene
Beta-lactam CMY-108
Quinolone QnrB13
 
Disclaimer:
The resistance mechanisms listed were identified by analysis of whole genome sequence using the ResFinder database (last updated June 2, 2016 and accessed on October 25, 2016). This analysis does not include mutations that may result in antibiotic resistance or resistance determinants added to newer versions of the ResFinder database or other antimicrobial resistance gene databases. Biosample accession numbers have been provided so that users can analyze the data on their own if so desired.
Propagation
MEDIUM
Medium: Trypticase Soy Agar with 5% Sheep Blood (BAP)

GROWTH CONDITIONS
Temperature: 35°C
Atmosphere: Aerobic

PROPAGATION PROCEDURE

Remove the sample vial to a container with dry ice or a freezer block. Keep vial on ice or block. (Do not let vial content thaw)

Open vial aseptically to avoid contamination

Using a sterile loop, remove a small amount of frozen isolate from the top of the vial

Aseptically transfer the loop to BAP

Use streak plate method to isolate single colonies

Incubate inverted plate at 35°C ± 2°C for 18-24 hrs.
Storage Temperature & Biosafety
STORAGE TEMPERATURE: -70°C

BIOSAFETY LEVEL: 2
Appropriate safety procedures should always be used with this material. Laboratory safety is discussed in the current publication of 'BioSafety in Microbiological and Biomedical Laboratories' from the U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, and National Institutes of Health.

Disclaimer:
This product is sent with the condition that you are responsible for its safe storage, handling, and use. All materials are the property of the Centers for Disease Control and Prevention (CDC) and have been made available on behalf of the Food and Drug Administration (FDA). This material is not for use in human subjects and may not be redistributed. While CDC uses reasonable efforts to include accurate and up-to-date information on this product sheet, CDC makes no warranties or representations as to its accuracy. CDC is not liable for damages arising from the misidentification or misrepresentation of cultures. Please refer to the Standard Letter Agreement (SLA) for further details regarding the use of this product.
Isolate History
Date Action Performed
04/20/23MIC was updated with a new value for Eravacycline: from '0.5' to '0.25'
Top of Page
TOP