Fix other taxon IDs

[podpearson]

As well as the issues identified in #53 and #54 , the queries at #29 highlighted various other taxa with very few samples, many of which look like nothing we might have wanted to sequence. We should attempt to figure out what species these samples are, e.g. by looking at sample IDs. It is recommended this is done after #53 and #54. I would suggest looking at all taxa with < 50 samples, but also the 384 samples with taxon 5283 (Sporidiobolales?).

Once this has been done, we should hopefully have all samples attached to a taxon that is something to do with malaria (e.g. parasite, vector or human).