Shakib belted 60 and senior opener Tamim Iqbal topscored with 74 as the Bangladeshis posted a challenging 171 for five after they were put in to bat
Williams' career-best figures and a hurricane batting cameo by Russell by the Windies in defeating Bangladesh by 7 wickets
"He looks fully fit now so we did not consider giving him a rest," said chief selector Minhajul Abedin.
It was Bangladesh's first series win outside of Asia for nine years, set up by their highest total in an ODI against the West Indies
Shimron Hetmyer blazed 125 off 93 balls to pace the home side to a competitive 271 all out batting first.
Tamim blasted unbeaten 130 while skipper Mashrafe Mortaza took four for 37 to lead Bangladesh to first victory on the tour of Caribbean
West Indies captain Holder was responsible for most of the carnage, taking six for 59 in the second innings to finish with match figures of 11 for 103
That second and final Test of the brief series begins July 12 in Kingston, Jamaica
Bangladesh chief selector added they have already included uncapped pacer Abu Jayed as back-up to Mustafizur
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