Caused by lice/louse: small wingless insects, dorsoventrally flattened, with reduced or no eyes and enlarged tarsal claws for clinging
Pediculus humanus
Head louse (capitus)^
Body louse (coporis)
Pthirus pubis
Pubic louse
Head louse (capitus)^
Body louse (coporis)
Pubic louse
Pediculus humanus capitis^
Affects millions of school-age children all over the world
Transmission is by close head-to-head contact and rarely through fomites such as hats, clothes, or pillowcases
Pediculus humanus corporis
Propagated when clothes are not washed or changed regularly
Usually affect homeless people, displaced persons, or prisoners in poor conditions
Vector for:
Rickettsia prowazekii (epidemic typhus)
Borellia recurrentis (relapsing fever)
Bartonella quintana (trench fever)
Pthirus pubis
Infests pubic hair and occasionally other hairy areas, such as eye lashes
Usually transmitted during intimate body contact, such as during sexual intercourse. Treatment must therefore include the patient's partner.
Affects millions of school-age children all over the world
Transmission is by close head-to-head contact and rarely through fomites such as hats, clothes, or pillowcases
Propagated when clothes are not washed or changed regularly
Usually affect homeless people, displaced persons, or prisoners in poor conditions
Vector for:
Rickettsia prowazekii (epidemic typhus)
Borellia recurrentis (relapsing fever)
Bartonella quintana (trench fever)
Rickettsia prowazekii (epidemic typhus)
Borellia recurrentis (relapsing fever)
Bartonella quintana (trench fever)
Infests pubic hair and occasionally other hairy areas, such as eye lashes
Usually transmitted during intimate body contact, such as during sexual intercourse. Treatment must therefore include the patient's partner.
^Most common
Pediculosis
Bed bugs
Glenohumeral instability
Lice
Phimosis
Scabies 
Dental subluxation
Ticks