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Table 2 Studies describing multi-taxon pathogens and their effect on cognitive impairment

From: Multi-pathogen infections and Alzheimer’s disease

Authors, Years

Pathogens

Matrix

Sample size

Methodology

References

Viruses and bacteria

 Bu et al., 2014

HSV-1, CMV, Borrelia burgdorferi, Chlamydia pneumoniae, Helicobacter pylori

Serum

128

AD

ELISA

[15]

 Strandberg et al., 2003

HSV-1, HSV-2, CMV, Chlamydia pneumoniae, Mycoplasma pneumoniae

Serum

383

ELISA

[52]

 Strandberg et al., 2005

HSV-1, HSV-2, CMV, Chlamydia pneumoniae, Mycoplasma pneumoniae, Helicobacter pylori

Serum

58

ELISA,

PCR-based analysis

[53]

 Katan et al., 2013

HSV-1, HSV-2, CMV, Chlamydia pneumoniae, Helicobacter pylori

Serum

1625

ELISA

[54]

 Wright et al., 2015

HSV-1, HSV-2, CMV, Chlamydia pneumoniae, Helicobacter pylori

Serum

588

ELISA

[55]

 Renvoize et al., 1987

HSV-1, CMV, Adenovirus, Influenza A and B, Measles

Chlamydia Group B, Coxiella burnettii, Mycoplasma pneumoniae

Serum

33

AD

Immunochemical analysis

[56]

Viruses and parasites

 Gale et al., 2016

CMV, HSV-1, HSV-2

Toxocaris, Toxoplasmosis, Hepatitis A, B, C

Serum

5662

Immunochemical analysis

[66]

 Nimgaonkar et al., 2016

HSV-1, HSV-2, CMV, Toxoplasma gondii

Serum

1022

Immunochemical analysis

[67]

Viruses and fungi

 Kuboshima et al., 2007

CMV, Aspergilloma

Lungs

1

AD

Autopsy

[68]

Bacteria and parasites

 Gale et al., 2015

Helicobacter pylori, Toxoplasma gondii

Serum

1785

Immunochemical analysis

[69]

Bacteria and fungi

 Alonso et al., 2018

Several bacterial and fungal species

Brain

10

AD

Immunochemical analysis, PCR-based analysis, NGS

[14]

Bacteria, viruses, and fungi

 Pisa et al., 2018

NC

Brain

2

AD

Immunochemical analysis, PCR-based analysis, Proteomic analysis

[19]

Bacteria, viruses, fungi, and parasites

 Pisa et al., 2017

NC

Brain

10

AD

Immunochemical analysis, PCR-based analysis

[20]

  1. NC not confirmed, AD samples from patients with confirmed AD