Description
A “Filariasis (Life Cycle of Roundworm)” (55×90 cm) educational chart visually explains the parasitic lifecycle of filarial roundworms—primarily Wuchereria bancrofti—responsible for lymphatic filariasis or elephantiasis, integrating both mosquito and human hosts.
Chart Features and Lifecycle Stages
Size and Material: Measures 55×90 cm, printed in vivid, laminated color for repeated use in biology classrooms.
Definitive Host—Human:
Infective larvae (L3 stage) are deposited onto the skin by a mosquito and enter the bite wound, traveling to the lymphatic vessels.
Within 6–12 months, larvae mature into adult male and female worms, which reside in the lymphatics and can live for 5–8 years.
Adult females release microfilariae (early larval forms) into the human bloodstream, usually at night for maximum uptake by feeding mosquitoes.
Mosquito Host—Vector:
When a mosquito (mainly Culex, Anopheles, or Aedes) ingests microfilariae during a blood meal, these develop through three larval stages inside the insect.
Mature third-stage larvae migrate to the mosquito’s proboscis, ready to infect a new human host upon the next bite, thus completing the cycle.
Educational Content:
The chart provides arrows and schematic diagrams showing cycles between mosquito and human, with notes on clinical symptoms (lymph node swelling, elephantiasis) and sites of infestation (lymphatics, blood, skin).
May include information on the timeline (incubation, survival), prevention strategies, and regional prevalence.
Teaching Utility:
Designed for parasitology, microbiology, and public health classes to illustrate disease transmission and vector biology.
Supports understanding of the link between vector control and disease prevention.
This chart is essential for understanding how roundworm parasites use both mosquitoes and humans in their lifecycle, making clear the processes underlying lymphatic filariasis and related diseases