  We establish that the category of Silva spaces, aka LS-spaces, formed by
countable inductive limits of Banach spaces with compact linking maps as
objects and linear and continuous maps as morphisms, is not an integral
category. The result carries over to the category of PLS-spaces, i.e.,
countable projective limits of LS-spaces -- which contains prominent spaces of
analysis such as the space of distributions and the space of real analytic
functions. As a consequence, we obtain that both categories neither have enough
projective nor enough injective objects. All results hold true when 'compact'
is replaced by 'weakly compact' or 'nuclear'. This leads to the categories of
PLS-, PLS$_{\text{w}}$- and PLN-spaces, which are examples of 'inflation exact
categories with admissible cokernels' as recently introduced by Henrard,
Kvamme, van Roosmalen and the second-named author.
