Anusha

Ancylostoma duodenale

Taxonomy    

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Kingdom : Phylum : Class : Order : Family : Genus : Species :

Animalia Nematoda Rhabditea Strongylida Ancylostomatidae Ancylostoma duodenale .

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

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 .

Buccal capsule

Adult worms

Copulatory bursa

Difference b/w male and female Male Caudal end

Genital opening

Expanded Umbrella like shape

Posterior part

Female Tapering Not expanded

In b/w middle 1/3 and post. part

Egg :

    

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

Filariform larva      

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

Pathogenesis    

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

Life cycle

Clinical manifestations 

20 – 40%

Asymptomatic

Skin manifestations : ground itch small itchy papules Site : around feet , b/w toes . Symptoms : intense itching

edema erythema rash .

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 . 

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 .

Treatmant

 Mebendazole 



Pyrantel pamoate Thiabendazole .