Adenoviridae, 35, 39, 227-235

Alfamovirus, 923-927

Allexivirus, 37, 40, 981-984

Allolevivirus, 645-646, 648-650

Alphacryptovirus, 503-504, 508-510

Alphaherpesvirinae, 203, 208-214, 223-224

Alphanodavirus, 747-751

Alpharetrovirus, 369-374, 386

Alphavirus, 879-887

Aphthovirus, 13, 657-661, 669-671, 675

Apscaviroid, 1009-1014, 1018-1019

Aquabirnavirus, 481-486, 489

Aquareovirus, 395-398, 440-445

Arenaviridae, 36, 40, 620, 633-640

Arenavirus, 633-640

Arteriviridae, 37, 39, 827-834, 851-856

Arterivirus, 827-834, 851-856

Ascoviridae, 35, 39, 261-265

Ascovirus, 261-265

Asfarviridae, 35, 39, 159-164, 181, 191

Asfivirus, 159-164

Astroviridae, 36, 40, 741-745

Astrovirus, 741-745

Aureusvirus, 791-798, 823

Avenavirus, 791-795, 798-801, 823

Aviadenovirus, 227, 234-237

Avibirnavirus, 481-485, 487-489

Avihepadnavirus, 325-330, 332-334

Avipoxvirus, 142, 145-146, 155

Avsunviroid, 1013, 1020-1021

Avsunviroidae, 1020-1021