Hymenolepis nana

Hymenolepis nana is the most common tapeworm in humans. It is also known as the dwarf tapeworm due to its particularly small size.

Characteristics
Shape and Size
eggs measure 30 to 47 µm in diameter. adults are only 15 40 mm long
Genome Information
H_nana_Japan total length: 162.944 Mb, GC%: 37.2 http://www.ncbi.nlm.nih.gov/genome/36528
Food Source
contaminate water and food
Pathological Factor
If the cysticercoid larvae are ingested accidentally by a human,it get inside the intestine and develop into adults. Prolonged infection or multiple tapeworms especially in children can cause more severe symptoms.The worms eat your food and cause inflammation of the intestinal mucosa. The inflamed tissue will have a reduced ability to absorb nutrients.Hymenolepiasis symptoms sometimes include:anal itching, diarrhea (can be bloody), headache, increased appetite or loss of appetite, insomnia, muscle spasms, nausea, nervousness, stomach ache, vomiting, weakness.
Disease
Hymenolepiasis
Symptoms
Diarrhea, Gastrointestinal discomfort, Itchy anus, Poor appetite, Weakness
Affected Body Organs
gastrointestinal organs

Classification
Kingdom Animalia
Phylum Platyhelminthes
Class Cestoda
Order Cyclophyllidea
Family Hymenolepididae
Genus Hymenolepis
Species H. Nana