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Table 2 Species, age, sex and immunohistochemical results for Aβ and hp-tau in pinnipeds

From: Amyloid β and tau pathology in brains of aged pinniped species (sea lion, seal, and walrus)

No

Families

Species

Common name

Age (years)

Sex

Hp-tau

Plaque

CAA

FC

PC

TC

OC

HP

FC

PC

TC

OC

HP

1

Phocidae

Phoca largha

Harbor seal

0

M

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

2

Phoca largha

Harbor seal

3

M

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

 − 

3

Phoca largha

Harbor seal

30

M

 − 

 + 

 − 

 − 

 − 

 − 

 + 

 − 

 − 

 − 

 − 

4

Phoca largha-Phoca vitulina

Harbor seal

34

F

 − 

 − 

 − 

 − 

 − 

 − 

 + 

 − 

 − 

 − 

 − 

5

Otariidae

Eumetopias jubatus

Northern sea lion

27

F

 +  + 

 +  + 

 + 

 + 

 − 

 + 

 + 

 − 

 − 

 − 

 − 

6

Zalophus californianus

California sea lion

27

F

 − 

 − 

 − 

 − 

 − 

 +  + 

 + 

 + 

 − 

 − 

 − 

7

Zalophus californianus

California sea lion

29

F

 + 

 + 

 + 

 + 

 − 

 +  + 

 − 

 − 

 − 

 − 

 − 

8

Zalophus californianus

California sea lion

32

F

 + 

 + 

 + 

 + 

 + 

 +  + 

 +  + 

 +  + 

 + 

 + 

 − 

9

Neophoca cinerea

Australian sea lion

32

F

 +  + 

 +  + 

 + 

 + 

 − 

 +  + 

 +  + 

 +  + 

 +  + 

 +  + 

 +  + 

10

Odobenidae

Odobenus rosmarus

Walrus

35

M

 + 

 + 

 − 

 + 

 − 

 + 

 + 

 − 

 − 

 − 

 − 

  1. M male, F female. Aβ, Hp-tau: −, negative; + , Aβ42-positive plaques, Aβ42 deposition in vascular walls (CAA) and AT8-positive cells in each areas, respectively; +  + , the above lesions were observed severely (Additional file 1: Fig. S1). FC frontal cortex, PC parietal cortex, TC temporal cortex especially in entorhinal cortex, OC occipital cortex, HP hippocampus