Herpes is caused by a virus. Viruses have a protein coat called a capsid, which is made of subunits called capsomeres.

Sleeping sickness is caused by Trypanosoma, which is a flagellated protozoan. All protozoans are heterotrophs.
Wheat rust is caused by the fungus Puccinia, which belongs to the class Basidiomycetes. In Basidiomycetes, asexual spores are generally not found. Zoospores and aplanospores are characteristic asexual spores of Phycomycetes.
Potato spindle tuber disease is caused by a viroid, which is an infectious agent consisting of a free RNA of low molecular weight and lacking a protein coat.

──────────────────────────────────────────────────────────────────────────────────────────