| leishmania | 192 | genus | invertebrates | | 5658 |
| ascaris | 90 | genus | invertebrates | | 6251 |
| botrytis | 90 | genus | plants | | 33196 |
| plasmodium berghei | 85 | species | invertebrates | protozoa | 5821 |
| plasmodium chabaudi | 67 | species | invertebrates | protozoa | 5825 |
| theileria | 63 | genus | invertebrates | | 5873 |
| gliocladium | 47 | genus | plants | | 62887 |
| ehrlichia ruminantium | 43 | species | bacteria | bacteria | 779 |
| reduviidae | 43 | family | invertebrates | | 27479 |
| la crosse virus | 40 | no rank | viruses | viruses | 11577 |
| human bocavirus | 39 | species | viruses | viruses | 329641 |
| taenia crassiceps | 36 | species | invertebrates | helminths | 6207 |
| plasmodium lophurae | 34 | species | invertebrates | protozoa | 5853 |
| plasmodium vinckei | 33 | species | invertebrates | protozoa | 5860 |
| hepatozoon | 32 | genus | invertebrates | | 75741 |
| pomphorhynchus laevis | 30 | species | invertebrates | helminths | 141832 |
| litomosoides carinii | 26 | species | invertebrates | helminths | 6299 |
| equid herpesvirus 2 | 26 | species | viruses | viruses | 12657 |
| brucella canis | 26 | species | bacteria | bacteria | 36855 |
| enterobius | 26 | genus | invertebrates | | 51027 |
| pasteurella tularensis | 23 | species | | bacteria | |
| leptospira pomona | 23 | species | | bacteria | |
| xmrv | 21 | no rank | viruses | viruses | 438045 |
| babesia argentina | 21 | species | | protozoa | |
| brachyspira aalborgi | 19 | species | bacteria | bacteria | 29522 |
| treponema vincentii | 19 | species | bacteria | bacteria | 69710 |
| aichivirus a | 19 | species | viruses | viruses | 72149 |
| [clostridium] clostridioforme | 18 | species | bacteria | bacteria | 1531 |
| cryptosporidium andersoni | 18 | species | invertebrates | protozoa | 117008 |
| j-virus | 17 | species | viruses | viruses | 322067 |
| babesia rodhaini | 16 | species | invertebrates | protozoa | 5870 |
| hormonema | 16 | genus | plants | | 46635 |
| cylicocyclus nassatus | 16 | species | invertebrates | helminths | 53992 |
| nematodirus helvetianus | 16 | species | invertebrates | helminths | 61842 |
| alloiococcus otitis | 15 | species | bacteria | bacteria | 1652 |
| equid herpesvirus 5 | 15 | species | viruses | viruses | 10371 |
| vogesella indigofera | 15 | species | bacteria | bacteria | 45465 |
| raillietina | 15 | genus | invertebrates | | 70662 |
| bordetella holmesii | 14 | species | bacteria | bacteria | 35814 |
| lapine rotavirus | 14 | no rank | viruses | viruses | 49892 |
| habronema | 14 | genus | invertebrates | | 227890 |
| [clostridium] innocuum | 13 | species | bacteria | bacteria | 1522 |
| dietzia maris | 13 | species | bacteria | bacteria | 37915 |
| ovine enzootic nasal tumor virus | 13 | species | viruses | viruses | 69576 |
| bacillus mojavensis | 13 | species | bacteria | bacteria | 72360 |
| plasmodium elongatum | 13 | species | invertebrates | protozoa | 77517 |
| chlamydia suis | 13 | species | bacteria | bacteria | 83559 |
| neospora hughesi | 13 | species | invertebrates | protozoa | 83675 |
| raillietiella | 13 | genus | invertebrates | | 311330 |
| canine minute virus | 13 | species | viruses | viruses | 329639 |
| cylicostephanus goldi | 12 | species | invertebrates | helminths | 71465 |
| cylicostephanus longibursatus | 12 | species | invertebrates | helminths | 71466 |
| argas reflexus | 11 | species | invertebrates | tick | 34604 |
| laribacter hongkongensis | 11 | species | bacteria | bacteria | 168471 |
| borrelia anserina | 10 | species | bacteria | bacteria | 143 |
| linognathus vituli | 10 | species | invertebrates | | 186220 |
| parelaphostrongylus odocoilei | 10 | species | invertebrates | helminths | 192633 |
| cephenemyia trompe | 10 | species | invertebrates | fly | 204915 |
| polyplax serrata | 10 | species | invertebrates | | 468196 |
| haematopinus suis | 10 | species | invertebrates | | 511927 |
| giardia ardeae | 9 | species | invertebrates | protozoa | 5743 |
| eimeria ovinoidalis | 9 | species | invertebrates | protozoa | 42767 |
| cyathostomum coronatum | 9 | species | invertebrates | helminths | 71429 |
| cylicostephanus calicatus | 9 | species | invertebrates | helminths | 71464 |
| columbicola columbae | 9 | species | invertebrates | | 128991 |
| parelaphostrongylus andersoni | 9 | species | invertebrates | helminths | 192632 |
| reighardia | 9 | genus | invertebrates | | 245000 |
| protospirura | 9 | genus | | | 1080593 |
| trypanosoma duttoni | 9 | species | | protozoa | |
| isospora canis | 9 | species | | protozoa | |
| mouse parvovirus 1 | 8 | species | viruses | viruses | 35340 |
| eimeria crandallis | 8 | species | invertebrates | protozoa | 42768 |
| mycoplasma alkalescens | 8 | species | bacteria | bacteria | 45363 |
| cochlosoma anatis | 8 | species | invertebrates | protozoa | 227314 |
| cystoisospora ohioensis | 8 | species | invertebrates | protozoa | 279926 |
| human mammary tumor virus | 8 | species | viruses | viruses | 341730 |
| gyalocephalus capitatus | 8 | species | | helminths | 1678061 |
| uncinaria lucasi | 8 | species | | helminths | 1080936 |
| longistrongylus | 8 | genus | | | |
| echinorhynchus salmonis | 8 | species | | helminths | 1597786 |
| eimeria arloingi | 8 | species | | protozoa | |
| brucella neotomae | 7 | species | bacteria | bacteria | 29460 |
| cylicocyclus insigne | 7 | species | invertebrates | helminths | 71431 |
| besnoitia darlingi | 7 | species | invertebrates | protozoa | 190281 |
| protostrongylus boughtoni | 7 | species | invertebrates | helminths | 544912 |
| plasmodium fallax | 7 | species | | protozoa | |
| protospirura muricola | 7 | species | | helminths | 1766045 |
| mastophorus muris | 7 | species | | helminths | 1499391 |
| neostrongylus linearis | 7 | species | | helminths | |
| ascarops strongylina | 7 | species | | helminths | |
| mycoplasma gallinarum | 6 | species | bacteria | bacteria | 29557 |
| corynebacterium tuberculostearicum | 6 | species | bacteria | bacteria | 38304 |
| campylobacter lanienae | 6 | species | bacteria | bacteria | 75658 |
| candidatus neoehrlichia mikurensis | 6 | species | bacteria | bacteria | 89586 |
| amidostomum | 6 | genus | invertebrates | | 108464 |
| trichuris leporis | 6 | species | invertebrates | helminths | 109045 |
| human picobirnavirus | 6 | species | viruses | viruses | 145856 |
| taenia saginata asiatica | 6 | subspecies | invertebrates | helminths | 246341 |
| dipetalonema dracunculoides | 6 | species | invertebrates | helminths | 328821 |
| saffold virus | 6 | no rank | viruses | viruses | 434309 |