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Agreement between AST from minute colony (8-10h growth) and mature colony (16-18h/overnight incubation)

Year: 2024

Type: article

Abstract: Sepsis is a medical emergency where a successful patient outcome depends on early and appropriate antibiotic treatment. This study was conducted to evaluate agreement between antimicrobial susceptibility testing (AST) from minute colonies that can reduce the AST-TAT by as much as 8-10h as compared to the CLSI recommended protocol of performing AST from an overnight (16-18h) growth of mature colony. In the present study, mDD results from minute colony (8-10h growth) were compared to the rDD results mature colony (16-18h/overnight incubation) CA and various types of errors were evaluated. 237 pathogens and 1597 organism-antibiotic combinations were evaluated, there was a CA of 93.30% which was extremely satisfactory and categorical disagreement was found only in 4.56% of organism-antibiotic combinations, which were mainly mE (4.56%) with nil VME (0%) and ME (0%). We have found that minute colony (8-10h) AST is in agreement with reference mature colony (16-18h) AST, shortening TAT by (8-10h) earlier than the conventional reference method which is very helpful in treatment of sepsis patients.

Source: IP International Journal of Medical Microbiology and Tropical Diseases

DOI: 10.18231/j.ijmmtd.2024.038

Authors: Apurba S Sastry, Sonali Padhy, Ketan Priyadarshi, Sarumathi Dhandapani, Stessy Ann Punnen

Institutions: Jawaharlal Institute of Post Graduate Medical Education and Research, All India Institute of Medical Sciences, Patna, Sri Devaraj Urs Medical College

Language: English

Topic: Bacterial Identification and Susceptibility Testing

Subfield: Clinical Biochemistry

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: hybrid

OpenAlex ID: W4402928388

FWCI:

Cites: 12

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Related to: 10