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Table 3 Genetic characterisation of T. gondii isolated from chickens in St. Kitts

From: Predominance of atypical genotypes of Toxoplasma gondii in free-roaming chickens in St. Kitts, West Indies

Chicken IDa

MAT titreb

Source of DNAc

No. of mice infectedd

Genetic characterisation

Isolate ID

SAG1

SAG2 (5’ and 3’)

Alt. SAG2

SAG3

BTUB

GRA6

c22-8

c29-2

L358

PK1

Apico

ToxoDB Genotype

1.6

1:6

Mouse

3 (0)

TgCkStK1

II or III

II

II

II

III

I

II

I

I

II

I

#264

  

Chicken

  

II or III

II

II

II

III

na

II

na

I

II

I

 

1.8

1:3

Mouse

3 (0)

TgCkStK2

II or III

II

II

III

II

II

II

III

III

II

III

#265

  

Chicken

  

na

na

II

III

na

II

na

na

III

II

III

 

2.1

1:800

Mouse

3 (3)

TgCkStK3

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

II or III

III

III

III

III

III

III

III

III

I

III

 

2.3

1:50

Mouse

3 (3)

TgCkStK4

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

II or III

III

III

III

III

III

III

III

III

I

III

 

3.2

0

Mouse

3 (0)

TgCkStK5

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

na

II

II

II

II

na

na

II

II

II

na

 

3.4

0

Mouse

3 (0)

TgCkStK6

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

II or III

II

II

II

II

II

II

II

II

II

II

 

3.5

1:6

Mouse

3 (3)

TgCkStK7

I

I

I

I

I

III

II

III

III

I

III

#13

  

Chicken

  

I

I

I

I

I

III

II

III

III

I

na

 

3.6

0

Mouse

3 (1)

TgCkStK8

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

II or III

II

na

II

II

na

II

II

II

II

II

 

3.8

1:10

Mouse

3 (2)

TgCkStK9

I

I

I

I

I

III

II

III

III

I

III

#13

  

Chicken

  

I

I

I

I

I

III

II

III

III

I

III

 

4.4

1:50

Mouse

3 (1)

TgCkStK10

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

na

na

na

na

na

na

na

na

na

na

na

 

5.1

1:3200

Mouse

3 (3)

TgCkStK11

I

I

I

I

I

III

II

III

III

I

III

#13

  

Chicken

  

I

I

I

I

I

III

II

III

III

I

III

 

5.2

1:25

Mouse

3 (2)

TgCkStK12

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

II or III

II

II

II

II

II

II

II

II

II

II

 

6.1

1:50

Mouse

3 (3)

TgCkStK13

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

II or III

III

III

III

III

III

III

III

III

I

III

 

6.2

1:6

Mouse

3 (3)

TgCkStK14

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

 

II or III

III

III

III

III

III

III

III

III

I

III

 

6.6

1:50

Mouse

3 (3)

TgCkStK15

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

II or III

III

na

III

III

III

III

III

III

I

III

 

8.5

1:25

Mouse

3 (3)

TgCkStK16

II or III

III

III

III

III

III

III

III

III

I

III

#141

  

Chicken

  

II or III

III

III

III

III

III

III

na

III

I

na

 

9.1

1:3

Mouse

2 (0)

TgCkStK17

II or III

II

II

III

II

II

II

III

III

II

III

#265

  

Chicken

  

II or III

II

II

III

II

II

II

III

III

II

III

 

9.2

1:10

Mouse

3 (0)

TgCkStK18

II or III

II

II

III

II

II

II

III

III

II

III

#265

  

Chicken

  

II or III

II

II

III

II

II

II

III

III

II

III

 

9.3

1:6

Mouse

3 (0)

TgCkStK19

II or III

II

III

III

III

III

III

III

III

III

III

#2

  

Chicken

  

II or III

II

III

III

III

III

III

na

III

III

na

 

9.5

1:3

Mouse

3 (0)

TgCkStK20

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

na

na

II

na

na

na

II

II

II

na

II

 

9.8

1:4000

Mouse

3 (0)

TgCkStK21

II or III

II

II

II

II

II

II

II

II

II

II

#1

  

Chicken

  

II or III

II

II

II

II

II

II

II

II

II

II

 
  1. Abbreviations: MAT modified agglutination test, na not amplified
  2. aLocation number followed by chicken number
  3. b T. gondii MAT titre for chicken sera (1:6 or above was considered positive)
  4. cDNA extracted from mouse brains or digested chicken tissues
  5. dOut of 3 mice inoculated (number of mice euthanized early due to clinical toxoplasmosis)
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