dog heartworm

severe cardiac and pulmonary problems

in humans, worms die before adult and are washed into lung microcirculation where they from granulomas

vector is Black Fly (simulium spp)

causes river blindness

MF lack sheath

severe dermatitis and blindness from heavy infections

AD have buccal cavity with cutting teeth

NA cutting plates

AD transmission:

1. skin via J3

2. oral ingestion of egg 

3. transplacental

4. transmammary

AD have hypobiosis and NA do not

cutaneous larval migrans

J3 invades skin in aberrant host

migrate causing serpigenous lesions (creeping eruption)

scratching causes 2ndary bacterial

Hookworm infections

Ancylostoma braziliense

Uncinaria stenocephala

Ancylostoma caninum

SBS syndrome

diarrhea

abdominal distention

malabsorption

effect on growth

roundworm of sea mammals

adults in gut lumen

1st: crustacean

2nd: paratenic fish

J3 infective stage

in humans remain J3 -- granulomas, nause, vomiting