Radix auricularia
... that the freshwater snail Radix auricularia serves as a host to numerous parasites, some of which can infect humans?
... that the <a class="mw-redirect" href="./Freshwater" id="mwAeY" rel="mw:WikiLink" title="Freshwater">freshwater</a> <a href="./Snail" id="mwAec" rel="mw:WikiLink" title="Snail">snail</a> <i id="mwAeg"><b id="mwAek"><a href="./Radix_auricularia" id="mwAeo" rel="mw:WikiLink" title="Radix auricularia">Radix auricularia</a></b></i> <i id="mwAes">(pictured)</i> serves as a <a href="./Host_(biology)" id="mwAew" rel="mw:WikiLink" title="Host (biology)">host</a> to numerous <a class="mw-redirect" href="./Parasite" id="mwAe0" rel="mw:WikiLink" title="Parasite">parasites</a>, some of which can infect humans?