1. Ancylostoma duodenale

2. Taxonomy Kingdom : Animalia Phylum : Nematoda Class : Rhabditea
Order : Strongylida
Family : Ancylostomatidae
Genus : Ancylostoma
Species : duodenale .

3. Old world hook worm
Causative agent of ancylostomiasis
Parasitic description by Dubini
Mode of infection by Loose
Habitat : lumen of small intestine

4. Adult worm : cylindrical , greyish white , slightly curved .
Morphology :
Adult worm : cylindrical , greyish white , slightly curved .
ant. end : bent slightly in same direction of body curve .
Buccal capsule : 6 teeth .
Post. end : bell shaped – copulatory bursa – holding the female worm .
Copulatory bursa : 13 rays in 3 lobes .

5. Buccal capsule
Copulatory bursa
Adult worms

6. Difference b/w male and female
Caudal end
Expanded
Umbrella like shape
Tapering
Not expanded
Genital opening
Posterior part
In b/w middle 1/3 and post. part

7. Egg :
Size : 60 mc in L ,40 mc in B .
Shape : oval
Non bile stained
Thin shelled
8 blastomeres , clear space .

8. Filariform larva
Non feeding form
Slender
500 – 600 mc in L
Pointed tail
Shorter oesophagus
Infective form .

9. Pathogenesis
Source : human faeces
Host : man
No intermediate host
Route : Penetration
Ingestion
Transmammary
Transplacental .

10. Life cycle

11. Clinical manifestations
20 – 40%
Asymptomatic
Skin manifestations : ground itch
small itchy papules
Site : around feet , b/w toes .
Symptoms : intense itching
edema
erythema
rash .

12. Respiratory manifestations :
Low grade fever
Mild cough , pharyngitis
dyspnea , pneumonia .
Intestinal manifestations :
low grade fever , anaemia , git disturbances
Anaemia : hypochromic microcytic
types – mild , moderate , severe .

13. concentration – formalin ether
Lab diagnosis
specimen : stool
Methods : microscopy – direct wet mount
concentration – formalin ether
salt flotation
kato katz method
culture – harada mori method .
imaging methods : x – rays .

14. Treatmant
Mebendazole
Pyrantel pamoate
Thiabendazole .