Mechanical
Injury
Medical
importance
Tick
Paralysis
Vectors of
diseases
Bacterial
diseases
Protozal
diseases
Rickettsial
diseases
Viral
diseases
Mechanical
Injury
MOT:
Insertion of its mouth parts into the skin
Salivary secretion of ticks causes blood haemolysis
Treatment:
Removal of ticks carefully with forceps by pulling them out steadily &
firmly until the tick comes out.
*take care! It should be taken out slowly and with care as to avoid leaving mouth parts in the
skin which will cause allergic reaction*
Tick Paralysis
Causative agent:
Neurotoxin excreted from tick’s salivary glands during bite of female ticks
causing paralysis (most common in children)
Characters:
Ascending flaccid paralysis causes respiratory failure & death
Symptoms:
Fatigue
Tongue & facial paralysis
respiratory failure & death
Treatment:
Removal of entire tick
Diseases
Causative MOT
organsims
Bacterial
Diseases
-Lyme disease or Spirochete
borreliosis
Borrelia
burgdorferi
Soft/Hard
ticks
Bites
Hard ticks
-Endemic
relapsing fever
Borrelia duttoni
-Bites
-Coxal fluid
-Transovarial
Soft ticks
-Tularemia
Francisella
tularensis
-Bite, feces or crushing on the skin wound
-Transovarial & Transstadial passage of
organism in tick
Hard Ticks
-Zoonotic
-Several species
of Babesia
-Bites of nymph
-(rarely) blood transfusion
-Transovarial/Transstadial (or both)
Hard Ticks
Ricketsia
ricketsiss
-Bite, fresh tick feces & crushing ticks
-Transovarial & transstadial passage in the
tick
Hard Ticks
Boutonneuse
fever
Ricketsia conori
-Bite, feces & crushing ticks
-Transovarial & transstadial passage in tick
Hard Ticks
Queensland tick
typhus
Q Fever
Ricketsia australis -(similar to boutonneuse fever)
Hard Ticks
Coxiella burnetii
-Bite of ticks
-Inhaling the organism in dried tick feces
Transovarial passage in tick
Soft ticks
RNA Virus
-bite
-Ingestion of contaminated milk of
infected animals
-Transovarial & transstadial passage of tick
-Bite of tick
-Blood transfusion
Hard Ticks
Protozoal
diseases
Babesiosis
Rickettsial
diseases
Rocky mountain
spotted fever
Viral diseases
Tick-borne
encephalitis
(TBE)
Colorado tick
fever (CTF)
RNA Virus
Hard Ticks
-Transstadial passage in tick