Introduction to Medical Entomology

Identify insects by their three-part body (head, thorax, abdomen), six legs, and antennae, and distinguish them from arachnids with a cephalothorax and chelicerae, like spiders.

Explain how insects breathe through spiracles and branching tracheal systems that split into tracheoles to deliver atmospheric oxygen directly to cells, with caterpillars as examples.

Explore the evolutionary classification of insects from kingdoms to binomial nomenclature, including arthropods, Insecta, Coleoptera, Scarabaeidea, Scarabaeinea, and the binomial name Kheper lamarcki.

Explore insect reproduction and life cycles, including oviparous, viviparous, and ovoviviparous strategies, and compare hemimetabolous, holometabolous, and ametabolous life cycles with wing development, highlighting medically important insects.

Explore insect modes of life, from phytophages feeding on plant material to predators that kill prey, detritivores consuming decaying matter, haematophages that take blood, and parasitoids that infect hosts.

Explore how parasitism shapes host and parasite evolution through the Red Queen hypothesis, vector dynamics, and disease resistance, including malaria, sickle cell anemia, and insecticide resistance.

Examine how pathogens disperse through vertical and horizontal transmission with examples like lice and fleas. Differentiate mechanical transmission from biological routes via vectors and bites, including tsetse flies and mosquitoes.

Parasites show heterogeneous dispersion, clustering on a few hosts to enhance mating, while mosquitoes transmit pathogens through sylvatic cycles, enabling zoonotic spread from forests to urban areas.

Explore the pros and cons of parasitism, including a warm, safe environment and food without hunting, and the challenges of host transmission and evading host defenses.

Identify viruses, bacteria, protozoa, nematodes, and insect larvae as key parasites in medical entomology, with examples such as COVID-19, arboviruses, Ebola, malaria, and river blindness.

Explore the diptera, a diverse order of flies and mosquitoes with over 150,000 species and a holometabolous life cycle. Learn about brachycera stylate, cyclorrhapha aristate, and nematocera segmented antennae.

Explore house flies (Muscidae), their anatomy, feeding behavior, reproduction, and how they spread pathogens like cholera and salmonella, plus physical, chemical, and environmental control strategies.

Identify horse flies and deer flies in the tabanidae family, with eyes and wings. Learn how female horse flies take blood and transmit Loa loa through a three-stage lifecycle.

Examine the tsetse fly, a sub-Saharan Africa vector of sleeping sickness, detailing its anatomy, haematophagy, transmission of Trypanosoma brucei, and the parasite’s life-cycle stages.

Blow flies, members of Calliphoridae with a metallic sheen, feed on carrion and can cause myiasis when larvae lodge in tissue; they're managed by sterile insect technique for pest control.

Examine botflies and warble flies of the oestridae family, their obligate myiasis life cycle, distinctive anatomy, and the human botfly's Central and South America distribution.

Examine the culicids—Anophelinae, Culicinae, and Toxorhynchitinae—and how Anopheles, Aedes, and Culex drive malaria and other pathogens. Understand mosquito anatomy, life cycle, and two-stage control strategies in aquatic and terrestrial environments.

Explore malaria, a global disease caused by Plasmodium falciparum transmitted by Anopheles mosquitoes. Trace the parasite’s life cycle—from sporozoites to schizonts, merozoites, and gametocytes—and review malaria symptoms and treatments.

Explore arboviruses transmitted by mosquitoes, including dengue, chikungunya, Zika, and yellow fever, their vectors, symptoms, lack of specific treatments, and how transmission occurs via infected female mosquitoes.

Explains filariasis caused by Wuchereria bancrofti and Brugia species. Describes mosquito transmission, lymphatic infection, elephantiasis, and diethylcarbamazine citrate, ivermectin, and antibiotics treatment.

Explore black flies (Simuliidae), their aquatic larvae in fast-flowing streams, and the blood-feeding adults that transmit Onchocerca volvulus, causing river blindness.

Learn how sand flies of the phlebotominae subfamily transmit Leishmania and cause visceral, cutaneous, and mucocutaneous leishmaniasis, detailing their anatomy and the amastigote–promastigote lifecycle.

Biting midges, Ceratopogonidae, are tiny vectors that transmit Mansonella pathogens and share a life cycle from microfilariae to larvae. Control focuses on removing breeding sites, repellents, and mesh nets.

Explore the diverse order Hemiptera, or true bugs, with piercing mouthparts and a hemimetabolous life cycle, and learn about its five suborders—Heteroptera, Coleorrhyncha, Cicadomorpha, Fulgoromorpha, Sternorrhyncha—and their medically important groups.

Explore kissing bugs (Triatoma) of the Reduviidae that feed on blood, transmit Trypanosoma cruzi, and cause Chagas disease, detailing their life cycle, transmission, symptoms, and prevention.

Bed bugs belong to the family Cimicidae and are haematophagous; they lack wings, form harbourages in tight crevices, and are not disease vectors. Control includes sealing cracks, vacuuming, and steaming.

Study fleas in medical entomology, their life cycle and anatomy, and how rat and human fleas transmit plague, typhus, and tungiasis, with control and treatment guidance.

Explore the biology and medical relevance of lice (Phthiraptera), including head, body, and pubic types, their haematophagous life cycle on the host, knits, and prevention and treatment strategies.

Explore arachnids, the class arachnida, with eight legs and two body parts, cephalothorax and abdomen; learn chelicerata, chelicerae, and pedipalps across spiders, scorpions, ticks, and mites.

Explore spiders and scorpions, their anatomy, silk and venom glands, and how cytotoxins and neurotoxins affect victims. Learn safe responses, antivenom needs, and regional examples of dangerous species.

Explore tick anatomy, hard and soft ticks, life cycles, and pathogen transmission, including tick bite fever, Lyme disease, and Crimean-Congo hemorrhagic fever, with prevention.