chapter 50 Zoonosis...........................................
DEFINITION/OVERVIEW
Zoonosis can be defined broadly (any disease/organism shared by animals and
humans) or narrowly (a disease/organism transmitted directly from animals to
humans).Distinction can blur with diseases affecting the skin, especially if vectors (especially
fleas and ticks) are included in this category.
A further consideration is whether external parasites carried by companion animals
that can irritate but not infest humans are included in this category.
Recent discussions include the concept that genes coding for multidrug resistance
may transfer from the bacterial populations on companion animals to humans, and
vice versa.Similar drug resistance patterns have been found in bacterial populations residing on
people and on animals in a household; this may be loosely considered as a zoonosis –
the transfer of drug resistance directly from animal to human may affect (though not
cause) disease in people.Zoonotic diseases and their vectors vary significantly geographically.
The lists in the following sections are not meant to be exhaustive and list dermatologic
diseases more commonly acquired directly from dogs and cats, diseases transmitted
by their ectoparasites, or dermatitis caused by ectoparasites carried on dogs and cats
(Figures 50.1–50.4).PARASITES
Cheyletiellaspp.
Sarcoptes scabiei
Otodectes cynotis
Leishmania
Notoedres cati
Ctenocephalides felisandcanis
Pulexspp.
Echnidnophaga gallinacea
Dipylidium caninum
Blackwell’s Five-Minute Veterinary Consult Clinical Companion: Small Animal Dermatology, Third Edition.
Karen Helton Rhodes and Alexander H. Werner.
©2018 John Wiley & Sons, Inc. Published 2018 by John Wiley & Sons, Inc.
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