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Early Lymphocyte Loss and Increased Granulocyte/Lymphocyte Ratio Predict Systemic Spread of Streptococcus pyogenes in a Mouse Model of Acute Skin Infection

Overview of attention for article published in Frontiers in Cellular and Infection Microbiology, April 2018
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Title
Early Lymphocyte Loss and Increased Granulocyte/Lymphocyte Ratio Predict Systemic Spread of Streptococcus pyogenes in a Mouse Model of Acute Skin Infection
Published in
Frontiers in Cellular and Infection Microbiology, April 2018
DOI 10.3389/fcimb.2018.00101
Pubmed ID
Authors

Torsten G. Loof, Aaqib Sohail, Mahmoud M. Bahgat, Aravind Tallam, Haroon Arshad, Manas K. Akmatov, Marina C. Pils, Ulrike Heise, Andreas Beineke, Frank Pessler

Abstract

Background: Group A streptococci may induce lymphopenia, but the value of lymphocyte loss as early biomarkers for systemic spread and severe infection has not been examined systematically. Methods: We evaluated peripheral blood cell indices as biomarkers for severity and spread of infection in a mouse model of Streptococcus pyogenes skin infection, using two isolates of greatly differing virulence. Internal organs were examined histologically. Results: After subcutaneous inoculation, strain AP1 disseminated rapidly to peripheral blood and internal organs, causing frank sepsis. In contrast, seeding of internal organs by 5448 was mild, this strain could not be isolated from blood, and infection remained mostly localized to skin. Histopathologic examination of liver revealed microvesicular fatty change (steatosis) in AP1 infection, and examination of spleen showed elevated apoptosis and blurring of the white pulp/red pulp border late (40 h post infection) in AP1 infection. Both strains caused profound lymphopenia, but lymphocyte loss was more rapid early in AP1 infection, and lymphocyte count at 6 h post infection was the most accurate early marker for AP1 infection (area under the receiver operator curve [AUC] = 0.93), followed by the granulocyte/lymphocyte ratio (AUC = 0.89). Conclusions: The results suggest that virulence of S. pyogenes correlates with the degree of early lymphopenia and underscore the value of peripheral blood indices to predict severity of bacterial infections in mice. Early lymphopenia and elevated granulocyte/lymphocyte ratio merit further investigation as biomarkers for systemic spread of S. pyogenes skin infections in humans and, possibly, related pyogenic streptococci in humans and animals.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 15 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 15 100%

Demographic breakdown

Readers by professional status Count As %
Other 2 13%
Student > Bachelor 2 13%
Student > Master 2 13%
Student > Ph. D. Student 2 13%
Student > Doctoral Student 1 7%
Other 2 13%
Unknown 4 27%
Readers by discipline Count As %
Medicine and Dentistry 4 27%
Agricultural and Biological Sciences 3 20%
Nursing and Health Professions 1 7%
Immunology and Microbiology 1 7%
Chemistry 1 7%
Other 0 0%
Unknown 5 33%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 April 2018.
All research outputs
#22,767,715
of 25,382,440 outputs
Outputs from Frontiers in Cellular and Infection Microbiology
#7,615
of 8,073 outputs
Outputs of similar age
#303,125
of 343,384 outputs
Outputs of similar age from Frontiers in Cellular and Infection Microbiology
#107
of 125 outputs
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So far Altmetric has tracked 8,073 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.8. This one is in the 1st percentile – i.e., 1% of its peers scored the same or lower than it.
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