  Recent progresses in the computation of quantum string corrections to
holographic Wilson loops are extended to the case of strings in $AdS_{4}\times
CP^{3}$. For this, the ratio of 1/2-BPS circular and 1/6-BPS latitude fermionic
Wilson loops in ABJM is considered at strong coupling by studying the
corresponding semiclassical string partition functions. Explicit evaluation of
fluctuation determinants using phaseshifts and diffeomorphism invariant
regulators leads to exact matching with the recent field theory proposal. Key
to this computation is the choice of boundary conditions for massless fermions.
In the limit for which the latitude Wilson loop has a trivial expectation
value, the long known localization result for the 1/2-BPS fermionic circular
Wilson loop in ABJM is recovered.
