Evidence map›Paper›PMID 41094510›Full record

ArticleThrombosis journal2025

Enhanced platelets aggregation and coagulation of methicillin-resistant Staphylococcus aureus compared to methicillin-sensitive Staphylococcus aureus.

Mohammad Al-Tamimi, Nisreen Himsawi

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Article in Thrombosis journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

Authors and funding

2 authors.

Mohammad Al-TamimiDepartment of Microbiology, Pathology and Forensic Medicine, Faculty of Medicine, The Hashemite University, Zarqa, Jordan. mohammad.altamimi@hu.edu.jo.
Nisreen HimsawiDepartment of Microbiology, Pathology and Forensic Medicine, Faculty of Medicine, The Hashemite University, Zarqa, Jordan.

Funding

This research was funded by a scientific grant provided by the scientific research deanship, The Hashemite University, Jordan 39/1045/2024
6 · The paper itself

Abstract

introductionStaphylococcus aureus (S. aureus) is well known for its ability to activate platelets and to induce plasma coagulation through different pathways. GAP STATEMENT: Enhanced human platelet aggregation and plasma coagulation by methicillin-resistant S. aureus (MRSA) have not been reported.

aimThis study aims to investigate platelets and coagulation activities of MRSA strains compared to methicillin-sensitive strains of S. aureus (MSSA).

methodsWell-characterized bacterial strains of Coagulase-negative Staphylococci (CoNS) (n = 25), and Coagulase-positive Staphylococci (CoPS) including MRSA (n = 25) and MSSA (n = 25) using phenotype and genotype analysis were compared for their coagulation and aggregation abilities. Isolates were tested for slide and tube coagulase test, mixed with human plasma and investigated for coagulation ability using manual and automated prothrombin time (PT), partial thromboplastin time (PTT), clotting time (CT), and thrombin time (TT) or mixed with human platelet rich plasma (PRP) and analyzed for reduced platelets count (aggregation) and for platelets aggregations using chrono-log aggregometer.

resultsMRSA isolates have faster, and stronger tube coagulase test compared to MSSA isolates. MRSA isolates compared to MSSA isolates have significantly reduced manual PT (7.2 ± 1.2 s vs. 10.5 ± 2 s, P < 0.0001), significantly reduced PTT (16.1 ± 1.5 s vs. 23.8 ± 2 s, P < 0.0001), and significantly reduced CT (84 ± 117.2 min vs. 148.3 ± 195 min, P < 0.0001). Similarly, MRSA isolates have significantly reduced PT, PTT, and TT compared to MSSA (P < 0.0001) using an automated coagulation analyzer. MRSA isolates induce a significant decrease in platelet count compared to MSSA (90.3 ± 35.9 vs. 121.1 ± 42.6, P < 0.001). MRSA isolates have significantly increased PRP aggregation compared to MSSA isolates indicated by increased aggregation maximum amplitude, aggregation slope, and area under the curve (P < 0.0001). PT test distinguishes CoPS from CoNS with 100% sensitivity and 98% specificity.

conclusionsEnhanced plasma coagulation and platelet aggregation of MRSA compared to MSSA strains is another virulence factor that increases MRSA protection, decreases antibiotics diffusion, and leads to thrombotic/clotting complications. PT is a useful diagnostic test for distinguishing CoPS from CoNS.

Indexed as

AggregationCoagulationMecAMethicillin-resistant Staphylococcus aureus (MRSA)Methicillin-sensitive Staphylococcus aureus (MSSA)PlateletsS. aureus

Identifiers

PMID41094510
PMCPMC12522576

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