You Do Need power plug adapter while traveling from Senegal to Guyana.

Here is Why You Need An Adapter

The outlet and plug type used in Guyana are A, B, D and G and in Senegal are C, D, E and K. This is how they look like.

Senegal

In Senegal, outlets of type C, D, E and K are in use.

Type C

Type D

Type E

Type K

Guyana

In Guyana, outlets of type A, B, D and G are in use.

Type A

Type B

Type D

Type G