Entomology Quiz: Cockroaches & Houseflies

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Questions and Answers

What is the primary control measure for cockroaches?

Benzyl benzoate (correct)

Boric acid

Pyrethrin

DDT

Which order do cockroaches belong to?

Coleoptera

Hemiptera

Orthoptera (correct)

Diptera

What feature helps distinguish male cockroaches from females?

Color of the body

Long antennae

Size of the body

Anal styles on the 9th segment (correct)

Where are cockroaches primarily found?

In dark and warm places Signup and view all the answers

What type of diet do cockroaches have?

Omnivorous Signup and view all the answers

Which of the following is a disease caused by cockroaches?

Allergies Signup and view all the answers

Which part of a cockroach's body is covered by a hard exoskeleton?

Entire body Signup and view all the answers

What aspect of the cockroach's body is flattened?

Body Signup and view all the answers

What is the size range of the housefly?

6-8 mm Signup and view all the answers

Which part of the housefly's body bears the prominent compound eyes?

Head Signup and view all the answers

What type of mouthparts does the housefly have?

Sponging type Signup and view all the answers

How does the housefly primarily contribute to the spread of diseases?

By carrying pathogens Signup and view all the answers

Which of the following diseases is NOT spread by houseflies?

Measles Signup and view all the answers

What body part of the female housefly aids in reproduction?

Ovipositor Signup and view all the answers

What is one method used for controlling the population of houseflies?

Spraying pyrethrum Signup and view all the answers

Which part of the housefly's leg is involved in walking and ceiling?

Pulvilli Signup and view all the answers

What is the primary role of medically important arthropods in public health?

Acting as vectors for diseases Signup and view all the answers

Which class of arthropods is characterized by four pairs of walking legs?

Arachnida Signup and view all the answers

Which of the following is a medically important arthropod known for transmitting malaria?

Mosquito (Culex) Signup and view all the answers

What type of effects can bites and stings from medically important arthropods cause?

Venom-induced systemic effects Signup and view all the answers

Which organism is classified under Crustacea?

Daphnia Signup and view all the answers

What type of organism is Sarcoptes scabiei?

Arachnid Signup and view all the answers

What is a common misconception about medically important arthropods?

They are all harmful to humans. Signup and view all the answers

Which of the following diseases is associated with vector transmission by arthropods?

Lyme disease Signup and view all the answers

Where do Sarcoptes scabiei typically lay their eggs?

Below the skin in soft regions Signup and view all the answers

Which medically important arthropod can cause allergic reactions due to its stings?

Bee Signup and view all the answers

What is the mode of transmission for Sarcoptes scabiei?

Close personal contact Signup and view all the answers

What physical characteristic distinguishes the adult female Sarcoptes from the male?

Adult females are longer than males Signup and view all the answers

What results from infestation by Sarcoptes scabiei?

Severe irritation and potential eczema Signup and view all the answers

Which of the following is NOT a consequence of arthropod infestations?

Improved public health Signup and view all the answers

What is a common habitat for Sarcoptes scabiei?

Soft regions of the skin Signup and view all the answers

What are the front legs of Sarcoptes scabiei adapted for?

Holding on with terminal stalked suckers Signup and view all the answers

What type of mouthparts do female mosquitoes possess?

Piercing and sucking type Signup and view all the answers

In which regions are mosquitoes most abundant?

Tropical and subtropical areas Signup and view all the answers

What characteristic differentiates the males from the females of mosquitoes?

Length of the antennae Signup and view all the answers

Which genus of mosquitoes is responsible for transmitting malaria?

Anopheles Signup and view all the answers

What does the typical size of a mosquito range from?

3-6 mm Signup and view all the answers

Which disease is NOT transmitted by Aedes mosquitoes?

Malaria Signup and view all the answers

What is the function of the wings in mosquitoes?

For sensory function and sound production Signup and view all the answers

Which of the following indicates a feature of the abdomen in mosquitoes?

It has 10 segments and aids in digestion Signup and view all the answers

What is the main purpose of Integrated Vector Management (IVM)?

To manage vector populations using various control methods Signup and view all the answers

Which of the following is NOT a method of vector control?

Manual removal of infected persons Signup and view all the answers

Which organism is an example of a vector for the disease Kala Azar?

Sand fly Signup and view all the answers

What is a characteristic of a reservoir in the context of vector diseases?

It harms the host Signup and view all the answers

Which method is effective in reducing breeding areas for vectors?

Removing stagnant water sources Signup and view all the answers

What is a benefit of using biological control strategies against vectors?

They reduce the use of synthetic chemicals Signup and view all the answers

How can limiting exposure contribute to vector management?

It significantly reduces infection risks Signup and view all the answers

What role do larvicides play in vector control?

They target larval stages of vectors Signup and view all the answers

Study Notes

Medically Important Arthropods

Arthropods are invertebrates with jointed legs, segmented bodies, and exoskeletons.
They can transmit diseases, cause harm through bites/stings, or cause infestations.
They include insects, arachnids, crustaceans, and myriapods.
They are important in public health due to their role in disease transmission.

Classification

Class 1: Crustacea: Have five pairs of walking legs. Examples include prawns, crabs, and daphnia.
Class 2: Myriapoda: Have many pairs of walking legs. Examples include millipedes and centipedes.
Class 3: Insecta (Hexapoda): Have three pairs of walking legs (six legs), including cockroaches, butterflies, moths, and honeybees.
Class 4: Arachnida: Have four pairs of walking legs. Examples include spiders, scorpions, ticks, and mites.

Public Health Importance

Disease Transmission: Arthropods act as vectors for viral, bacterial, and parasitic diseases.
Direct Effects: Bites and stings cause skin irritation, allergic reactions, and venom-induced issues.
Infestations: Can cause discomfort, secondary infections, and social stigma.
Economic and Social Impact: Arthropods can lead to lost productivity, increased healthcare costs, and strain on public health systems.
Irritant Pests: Disrupt human activity and living conditions, even if not directly transmitting diseases.

Examples of Medically Important Arthropods

Mangemite (Sarcoptes scabiei): Causes scabies.
Cockroaches (Periplaneta americana): Common household pests.
Houseflies (Musca nebulo): Carriers of pathogenic microorganisms.
Mosquitoes (Culex, Anopheles, and Aedes): Vectors for diseases like malaria and dengue fever.
Sand flies (Phlebotomus argentipes): Vectors for leishmaniasis.
Human louse (Pediculus humanus): Causes discomfort and secondary infections.
Bed bugs (Cimex): Irritant pests.
Fleas (Xenopsylla cheopis): Vectors for diseases.

Mangemite (Sarcoptes scabiei)

Distribution: Worldwide
Habitat: Burrows under the skin, especially in folds of skin.
Morphology: Microscopic mites with a distinctive body structure.
Mode of Infection: Close personal contact.
Diseases: Causes scabies, an itchy skin condition.

Cockroaches (Periplaneta americana)

Distribution: Tropical and subtropical regions, worldwide.
Habit: Dark, warm places in kitchens, storehouses.
Morphology: Dorsoventrally flattened body, segmented.
Diseases: Not direct disease vectors; carry pathogens.

Houseflies (Musca nebulo)

Distribution: Cosmopolitan.
Habit: Around human habitations.
Morphology: Oval shape, dark grey body, yellowish tinge.
Diseases: Dysentery, typhoid, cholera, tuberculosis, anthrax and diarrhea are diseases spread by houseflies.

Mosquitoes (Culex, Anopheles, and Aedes)

Distribution: Damp and marshy areas, globally, especially the tropics.
Habit: Nocturnal, females feed on blood of warm-blooded animals. Males feed on nectar.
Morphology: Different species have variations in coloration and body markings.
Diseases: Malaria, Dengue fever, Elephantiasis, and Yellow fever.

Integrated Vector Management (IVM)

Concept: A comprehensive approach to manage vectors.
Components: Habitat control, chemical control, biological control, and reducing contact.
Importance: Effective, cost-effective, ecological, and sustainable approach for managing vector-borne diseases.
Reservoirs: Sites where pathogens live in the body of animals prior transmitting to humans or animals.
Vectors: The carrier of parasites/pathogens that transmit diseases.

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Description

Test your knowledge on the control measures, biology, and public health implications of cockroaches and houseflies. This quiz covers key features of these medically important arthropods and their roles in disease transmission. Perfect for students of entomology or anyone interested in pest control and public health.