UDA Secretary General Cleophas Malala welcomed 12 new defectors to the party.
Though Malala did not clarify from which party the new members had defected from, he was happy UDA had "harvested more in Western Kenya."
"This afternoon, on behalf of my party, I had the pleasure to receive defectors and delegates from Vihiga county to the UDA party at my Mushikulu rural home, Kakamega County," Malala said after receiving the defectors on Friday.
The defectors were led by Sabatia MP Clement Sloya and CAS nominee Jackie Mwenesi among other leaders from Vihiga County.
The defectors from Vihiga included Ken Vitisia, Amara Elisha, Masini Wycliffe, Obedi Chunguli Hamisi, Nickson Butiya, Dauglus Beru Sabatia, Khalid Balala, Gladys Analo Emuhaya and Ollinga Jairus.
Those from Luanda were Butiko Kennedy and Alukhutsa Peter.
Malala said the defections to the UDA Party come at a time when the party is increasing its foothold in the vote-rich region after a successful development tour by President William Ruto.
"The Vihiga leaders lauded President Ruto's development plan for Western Kenya noting that it will bring economic development and create opportunities for the people," Malala said.
He said the ruling party is a national party adding that it is open to new membership.
Malala said the party is also open to new ideas that will strengthen it as it delivers on its mandate.