COMMON NAME
Ascaris Lumbricoides Large Intestinal Roundworm
Necator Americanus New world hookworm
Ancylostoma Duodenale Old world hookworm
Strongyloides Stercoralis Threadworm
Trichuris Trichiuria Whipworm
Enterobius Vermicularis Seatworm, Pinworm
Trichinella Spiralis Pork Worm
Capillaria Philippinensis Pudoc Worm
APPEARANCE
Ascaris Lumbricoides Pencil lead thicknesss, prominent incurved tail
Necator Americanus Shearing chitinous plates
Ancylostoma Duodenale Chitinous teeth
Strongyloides Stercoralis Colorless, transparent body, short buccal, long and
slender esophagus
Trichuris Trichiuria Anterior 3/5- fine hair structure form esophagus
Posterior 2/5 – contain intestine and reproductive system
Barrel-shaped eggs
Enterobius Vermicularis Spindle-shaped, lateral wings or cephalic alae, D
appearance
Trichinella Spiralis Thread-like appearance, spear like burrowing tip
Capillaria Philippinensis Peanut-shaped
MODE OF TRANSMISSION
Ascaris Lumbricoides Ingestion of Embryonated egg
Necator Americanus Burrowing through the skin of the foot
Ancylostoma Duodenale Burrowing through the skin of the foot
Strongyloides Stercoralis Direct, Indirect, Autoinfection (Skin-penetration)
Trichuris Trichiuria Ingestion of Embryonated egg
Enterobius Vermicularis Ingestion of Embryonated egg
Trichinella Spiralis Ingestion of undercooked pork
Capillaria Philippinensis Ingestion of undercooked fish
INFECTIVE STAGE
Ascaris Lumbricoides Embryonated egg
Necator Americanus Filariform larva
Ancylostoma Duodenale Filariform larva
Strongyloides Stercoralis Filariform larva
Trichuris Trichiuria Embryonated egg
Enterobius Vermicularis Embryonated egg
Trichinella Spiralis Encysted egg
Capillaria Philippinensis Embryonated egg
LOCATION / HABITAT
Ascaris Lumbricoides Lumen of the small intestine
Necator Americanus Small intestine
Ancylostoma Duodenale
Strongyloides Stercoralis Female: Mucosa of the duodenum
Trichuris Trichiuria Cecum
Enterobius Vermicularis Cecum, Appendix, Colon, Ileum
Trichinella Spiralis Muscle, Intestine
Capillaria Philippinensis Jejunum, mucosa
DISEASE/PATHOLOGY
Ascaris Lumbricoides Tissue and Lungs damage, Peritonitis, Pneumonitis,
Eosinophilia and 02 desaturation, Obstruction,
Perforation and Occlusion in the Apendix
Necator Americanus Sucks blood and injured intestinal tissue
Ancylostoma Duodenale Anemia
Strongyloides Stercoralis Strongyloidiasis
Trichuris Trichiuria Diarrhea, Anemia, Prolapse of the anus and rectum,
Appendicitis
Enterobius Vermicularis Ulcer, Vulvovaginitis & Salphingis
Trichinella Spiralis Trichinosis, Trichinasis, Trichinelliasis
Capillaria Philippinensis Hepatic Capillariasis
LAB DIAGNOSTIC
Ascaris Lumbricoides ELISA, Recovered in stool
Necator Americanus Reverse Enzyme Immunoassay for specific IgE
Ancylostoma Duodenale Recovery and Examination of buccal capsule
Strongyloides Stercoralis Stool concentration with zinc sulfate
Enterotest and ELISA
Trichuris Trichiuria DFS, Cellophane Thick Smear, Kato Thick Smear
Enterobius Vermicularis Perinial cellulose tape swab or Scotch tape swab
Trichinella Spiralis Biopsy, Xenodiagnosis, Bachman Intradermal Test
Capillaria Philippinensis Simple fecal smear, Concentration method using acid
ether or formalin ether method
TREATMENT
Ascaris Lumbricoides Mebendazole• Pyrantelpamoate• Levamisole•
Piperazine Citrate
Necator Americanus Mebendazole• Pyrantelpamoate• Iron Replacement•
Dietary theraphy
Ancylostoma Duodenale
Strongyloides Stercoralis Thiabendazole • Albendazole• Ivermectin
Trichuris Trichiuria Albendazole • Mebendazole • OxantelPyrantel
Enterobius Vermicularis Mebendazole • PyrantelPamoate
Trichinella Spiralis Thiabendazole • ACTH orCorticosteroid • Mebendazole
Capillaria Philippinensis Menendazole • Albendazole
KEYWORDS
Ascaris Lumbricoides Most common intestinal helminth infection in the world
Necator Americanus mixed infections w/ any combo of hookworm, Trichuris
and Ascaris is possible because all organisms require the
same soil conditions
Ancylostoma Duodenale
Strongyloides Stercoralis Free living or Parasistic
Trichuris Trichiuria 2nd common intestinal worm aside fromAscaris,
holomyarian - arrangement of somatic muscles in cross
section
Enterobius Vermicularis Meromyarian - arrangement of the somatic muscles
where there are two to five cells per dorsal or ventral
half.
Trichinella Spiralis provided w/ a small orbicular, non- papillated mouth
Capillaria Philippinensis
EPIDEMIOLOGY
Ascaris Lumbricoides tropical and subtropical regions, especially in areas with
inadequate sanitation.
Necator Americanus warm areas where the inhabitants practice poor
sanitation practices
Ancylostoma Duodenale
Strongyloides Stercoralis found predominantly in tropics andsubtropics
Trichuris Trichiuria Usually occur in moist, warm, tropicalregion of Asia,
Central and South America, Africa and the Caribbean
Islands.
Enterobius Vermicularis women are infected more than men
children are infected more than adult
Hand to mouth transmission
Trichinella Spiralis
Capillaria Philippinensis Origin: Bacarra Ilocos Norte
EGG MORPHOLOGY
Ascaris Lumbricoides
Necator Americanus
Ancylostoma Duodenale
Strongyloides Stercoralis
Trichuris Trichiuria
Enterobius Vermicularis
Trichinella Spiralis
Capillaria Philippinensis
