RT Book, Section
A1 Pollack, Richard J.
A1 Norton, Scott A.
A2 Jameson, J. Larry
A2 Fauci, Anthony S.
A2 Kasper, Dennis L.
A2 Hauser, Stephen L.
A2 Longo, Dan L.
A2 Loscalzo, Joseph
SR Print(0)
ID 1156510719
T1 Ectoparasite Infestations and Arthropod Injuries
T2 Harrison's Principles of Internal Medicine, 20e
YR 2018
FD 2018
PB McGraw-Hill Education
PP New York, NY
SN 9781259644016
LK accessmedicine.mhmedical.com/content.aspx?aid=1156510719
RD 2021/04/10
AB Ectoparasites  include  arthropods  and  creatures  from  other  phyla  that  infest  the  skin  or  hair  of  animals;  the  host  animals  provide  them  with  sustenance  and  shelter.  The  ectoparasites  may  penetrate  within  or  beneath  the  surface  of  the  host  or  may  attach  by  mouthparts  and  specialized  claws.  These  organisms  may  inflict  direct  mechanical  injury,  consume  blood  or  nutrients,  induce  hypersensitivity  reactions,  inoculate  toxins,  transmit  pathogens,  create  openings  in  the  skin  for  secondary  bacterial  infection,  and  incite  fear  or  disgust.  Human  beings  are  the  sole  or  obligate  hosts  for  only  a  few  kinds  of  ectoparasites  but  serve  as  facultative,  dead-end,  or  paratenic  (accidental)  hosts  for  many  others.