K10 Introduction to Medical Entomology

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Questions and Answers

Which type of transmission involves the disease agent undergoing both developmental change and multiplication in number?

Cyclo-developmental transmission

Cyclo-propagative transmission (correct)

Transovarian transmission

Transstadial transmission

What is the characteristic of propagative transmission?

The disease agent is passed onto the next generation through the eggs of the insect

The disease agent multiplies in number only (correct)

The disease agent undergoes developmental change

The disease agent undergoes both developmental change and multiplication in number

Which of the following is an example of a disease transmitted through transstadial transmission?

Filaria larva in culex

Scrub typhus in trombiculid mite

Typhoid in housefly (correct)

Malaria parasite in Anopheles

What is the characteristic feature of Arachnida?

They have 8 legs Signup and view all the answers

Which of the following is an example of a Myriapoda?

Centipedes Signup and view all the answers

What is the characteristic feature of Insecta?

They have 6 legs Signup and view all the answers

Which of the following is an example of a disease transmitted through transovarian transmission?

Scrub typhus in trombiculid mite Signup and view all the answers

What is the characteristic feature of Crustacea?

They have 10 legs Signup and view all the answers

What is the primary focus of Medical Entomology compared to Entomology?

Study of insects of medical importance Signup and view all the answers

What is the term for the fear of insects?

Entomophobia Signup and view all the answers

Which of the following is an example of mechanical transmission?

Typhoid, Cholera, Dysentery by houseflies Signup and view all the answers

What is the term for the infestation of live tissues by fly larvae?

Myiasis Signup and view all the answers

What is the term for the condition where a person believes they are infested with parasites?

Delusional Parasitosis (DP) Signup and view all the answers

Which of the following is an example of direct contact transmission?

Scabies by mites & Pediculosis by lice Signup and view all the answers

What is the term for the itchy, raised patches on the skin caused by an allergic reaction to insect bites?

Urticaria (Hives) Signup and view all the answers

Which of the following is NOT a type of negative interaction with arthropods?

Photosynthesis Signup and view all the answers

Which of the following insects has a pair of antennae and a pair of compound eyes?

Insect Signup and view all the answers

What is the primary function of Malphigian tubules in insects?

Excretion Signup and view all the answers

Which of the following is NOT a type of insect?

Crustacea Signup and view all the answers

Which of the following insects is a vector of dengue fever?

Aedes aegypti Signup and view all the answers

What is the primary function of book-lungs in arachnids?

Respiration Signup and view all the answers

Which of the following is a characteristic of the class Arachnida?

Presence of four pairs of walking legs Signup and view all the answers

Which of the following is a medically important insect?

All of the above Signup and view all the answers

Which of the following is a type of arachnid?

All of the above Signup and view all the answers

Study Notes

Introduction to Medical Entomology

Medical Entomology is a specialization of Entomology that deals with insects that are medically important.
Size does not matter, as mosquitoes have killed more people than any other living thing in the world.

Negative Interactions with Arthropods

Delusional Parasitosis (DP) and Entomophobia
Envenomation
Bites and Piercing
Myiasis
Allergic reactions
Urticaria (Hives)

Modes of Transmission

Direct contact: Arthropods are directly transmitted from man to man through close physical contact.
Mechanical transmission: The disease agent is mechanically carried by the arthropod.
Biological transmission:
- Propagative: The disease agent multiplies in number in the body of the arthropod without undergoing developmental change.
- Cyclo-propagative: The disease agent undergoes both developmental change and multiplies in number.
- Cyclo-developmental: The disease agent undergoes only developmental change (no multiplication).
Transovarian transmission: The disease agent is passed onto the next generation through the eggs of the insect.
Transstadial transmission: The disease agent is passed from one stage of life cycle to another and then transmits the disease to man.

Taxonomical Classification of Arthropods

Arthropods:
- Insecta (6 legs, exoskeleton, 3 body parts, mostly terrestrial and some aerial)
- Arachnida (8 legs, exoskeleton, 2 body parts, mostly terrestrial)
- Crustacea (10 legs, exoskeleton, 2 body parts, mostly aquatic)
- Myriapoda (lots of legs, exoskeleton, lots of segments, mostly terrestrial)
Class: Insecta
- Order: Diptera (flies), Order: Coleoptera (beetles), Order: Siphonaptera (fleas), Order: Hemiptera (true bugs), Order: Phthiraptera (lice)
- Examples of medically important insects: mosquitoes, sandflies, tabanidae (horse fly), glossinidae (tsetse fly), muscidae (house fly), sarchophagidae (flesh fly)
Class: Arachnida
- Examples: Aranea (spider), Palamnaeus (scorpion)
Class: Crustacea
- Examples: ticks, mites (scabies mites, leptotrombidium sp., dermatophagoides sp., demodex folliculorum)
Order Acarina
- Examples: ticks, mites

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Description

This quiz covers the basics of medical entomology, including general introduction, mode of transmission, and taxonomical classification. It's designed for students in the Faculty of Health Science at Universiti Kebangsaan Malaysia.