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Table 1 Studies identifying single-taxon pathogens in samples from subjects with AD

From: Multi-pathogen infections and Alzheimer’s disease

Authors, Years

Pathogens

Matrix

Sample size

Methodology

References

Herpetic viruses

Lövheim et al., 2018

HSV-1, CMV

Plasma

360

ELISA

[23]

Lin et al., 2002

HSV-2, CMV, HHV-6

Brain

148

PCR-based analysis

[28]

Carbone et al., 2014

CMV, EBV, HHV-6

Brain

Plasma

PBL

93

PCR-based analysis, ELISA

[29]

Redhead et al., 2018

HHV-6, HHV-7

Brain

Cohort study

RNA sequencing, statistical analysis

[30]

Hemling et al., 2003

HSV-1, HHV-6, VZV

Brain

34

PCR-based analysis

[31]

Bacteria

Riviere et al., 2002

Treponema species

Brain

19

PCR-based analysis, immunochemical analysis

[41]

Kamer et al., 2009

Periodontal bacteria

Plasma

18

ELISA

[42]

Beydoun et al., 2020

Helicobacter pylori, periodontal bacteria

Serum

1431

Immunochemical analysis, statistical analysis

[43]

Sparks Stein et al., 2012

Periodontal bacteria

Serum

81

ELISA

[44]

Emery et al., 2017

Actinobacteria, Bacteroidetes, Firmicutes, Proteobacteria

Brain

14

16S rRNA sequencing

[45]

Siddiqui et al., 2019

Gingivitis bacteria

Periodontal bacteria

Brain

10

16S rDNA sequencing

[46]

Fungi

Alonso et al., 2014

Saccharomyces cerevisiae, Malassezia globosa, Malassezia restricta, Penicillinum, Phoma

Serum

29

Immunofluorescence analysis, slot-blot analysis

[47]

Alonso et al., 2014

Candida sp., Saccharomyces cerevisae, Rhodotorula mucilaginosa

Brain

11

Proteomic analysis

PCR-based analysis

[48]

Alonso et al., 2015

Candida albicans, Cladosporium cryptococcus, Malasezzia globosa

Malasezzia restricta, Saccharomyces cerevisiae

CSF

10

PCR-based analysis, slot-blot analysis

[49]

Pisa et al., 2015

Candida sp., Cladosporium, Phoma, Malassezia globosa, Malassezia restricta, Neosartorya hiratsukae, Saccharomyces cerevisiae, Sclerotina borealis

Brain

11

PCR-based analysis, immunochemical analysis

[50]

Alonso et al., 2017

Candida albicans, Cladosporium cryptococcus, Malasezzia globosa

Saccharomyces cerevisiae

Brain

9

PCR-based analysis, NGS

[51]

  1. PBL peripheral blood leukocytes, CSF cerebrospinal fluid, NGS next-generation sequencing