Dominant species Plaga

Master Plaga
A Master Plaga is a Plaga that has fully grown and cannot be removed from the body by any physical means.

There are only two Master Plaga seen in all of Resident Evil 4.The first is the Plaga that bursts out of the back of El Gigante.This is the only Master Plaga that is that immense in size.The only way a Plaga could grow that large is from mass mutation.The other seen is the one exposed on the back of a Garrador(the prison boss at the beginning of Salazar's Castle)Normally,a Master Plaga grows only to the size of an infant's fingernail.Like I said,it could only grow large by a rapid mutation sequence.

Ada Wong and Jack Krauser were sent on a mission to find a sample of a master Plaga by Albert Wesker,the head of the Umbrella Corporation,for his own personal knowledge gain.Ada retreived the sample but did not inform Wesker,she deceived Wesker and told him she did not find the sample,and that there was no such thing