Infectious Diseases Practice Questions

Q: Which mosquito larva has no siphon and rests parallel to the water surface?

Anopheles. ***Anopheles*** - **Anopheles** larvae lack a **siphon** (breathing tube) and breathe through spiracles located on the dorsal surface of the abdomen. - This absence of a siphon causes them to rest **parallel** to the water surface, which is a key identifying feature for species differentiation. *Aedes* - **Aedes** larvae possess a **siphon**, which is relatively shorter and stouter compared to *Culex*. - They hang down from the water surface at an angle, utilizing the siphon for air intake, not lying parallel to the surface. *Culex* - **Culex** larvae possess a long, distinct **siphon** (breathing tube) at the posterior end of the abdomen. - Due to the siphon, they rest at an **angle** (typically 45-60 degrees) to the water surface for breathing. *Mansonia* - **Mansonia** larvae have a modified, sharp **siphon** used to pierce the submerged **stems of aquatic plants** for oxygen extraction. - They remain attached to these plants underwater and do not float on or rest parallel to the water surface.

Q: Identify the Anopheles mosquito larva from the image shown below:

Anopheles. ***Anopheles*** - The first image, showing a larva resting **parallel to the water surface** with a **rudimentary breathing tube**, is characteristic of *Anopheles* mosquito larvae. - Unlike *Culex* or *Aedes* larvae, *Anopheles* lack a prominent siphon, allowing them to lie flat against the water for respiration. *Option B* - This option likely refers to the second or third image, which depicts larvae resting at an angle to the water surface with distinct breathing tubes (siphons). These characteristics are typical of *Culex* or *Aedes* larvae, not *Anopheles*. - The presence of a short or long air tube (siphon) differentiates these from the *Anopheles* larva's rudimentary breathing mechanism. *Option C* - Similar to Option B, this refers to larvae with prominent breathing tubes and an angular resting position. These are features of *Culex* or *Aedes* species. - The specific description of the air tube (short and stout or long and slender with hair tufts) helps further distinguish between *Culex* and *Aedes*, neither of which matches the *Anopheles* morphology shown in the first panel. *Option D* - This option also describes larval types with clear breathing tubes and an angled resting posture, which are not characteristics of *Anopheles* species. - The distinct morphology of the first larva, particularly its parallel resting position and rudimentary breathing tube, is unique to *Anopheles*.

Q: Which is the mosquito shown in the figure?

Aedes. ***Aedes*** - The mosquito in the figure is an **Aedes mosquito**, identifiable by the distinctive **black and white striped pattern** on its legs and body. - Aedes mosquitoes are known vectors for diseases like **dengue**, chikungunya, Zika, and yellow fever. *Anopheles* - **Anopheles mosquitoes** typically have a plain brown or grey body and often rest with their abdomen pointing upwards at an angle to the surface. - They are primarily recognized for transmitting **malaria**. *Culex* - **Culex mosquitoes** are generally brown and have unpatterned legs; they typically rest with their body parallel to the surface. - They are vectors for diseases such as **West Nile virus** and filariasis. *Mansonia* - **Mansonia mosquitoes** are distinguished by broad scales on their wings and often have speckled bodies and legs, though their patterns are different from the distinct banding of Aedes. - They are known to transmit **lymphatic filariasis**.

Q: Which is the type of mosquito shown below?

Aedes mosquito. The provided image is a mosquito. Based on the characteristics visible, particularly the **striped legs and body**, it appears to be an **Aedes mosquito**. Here's an explanation of why each option might be correct or incorrect (*Note: The options provided in the input were null, so I'm generating options based on common mosquito types*): ***Aedes mosquito*** - Recognizable by its **black and white striped patterns** on the legs and body. - This genus is a significant vector for diseases like **dengue**, **chikungunya**, and **Zika fever**. *Anopheles mosquito* - Anopheles mosquitoes often have **dark and pale scales on their wings**, creating a spotted appearance, which isn't distinct here. - They typically rest with their **abdomen raised at an angle** to the surface, differing from the posture seen. *Culex mosquito* - Culex mosquitoes usually have a **more uniform brownish body** and **unmarked wings**. - They tend to rest with their **body parallel to the surface**, but lack the distinct striped pattern seen in the image. *Haemagogus mosquito* - Haemagogus mosquitoes are known for their **bright metallic blue or purple coloration**, which is not present in the image. - They are primarily forest-dwelling and can also transmit yellow fever.

Q: The insect shown in the figure is a vector of which of these diseases?

Filaria. ***Filaria (Lymphatic Filariasis)*** - The image shows a **mosquito** with characteristics consistent with **Culex** species (likely *Culex quinquefasciatus*), which is the primary vector for **lymphatic filariasis** in endemic regions - Lymphatic filariasis is caused by filarial worms (*Wuchereria bancrofti, Brugia malayi*) transmitted through infected mosquito bites - *Culex* mosquitoes have a characteristic blunt abdomen and parallel resting posture *Leishmaniasis* - Transmitted by **sandflies** (*Phlebotomus* and *Lutzomyia* species), not mosquitoes - Sandflies are much smaller, hairy, and have distinctive wing positioning *Yellow fever* - While transmitted by mosquitoes, specifically ***Aedes aegypti*** - *Aedes* mosquitoes have distinctive **white markings** on legs and body (lyre-shaped pattern on thorax) - The mosquito in the image lacks these characteristic *Aedes* features *Malaria* - Transmitted by ***Anopheles*** mosquitoes - *Anopheles* have a distinctive **resting posture** with abdomen raised at an angle (approximately 45°) to the surface - The mosquito shown has a **parallel resting posture**, ruling out *Anopheles*

Q: The larva shown belongs to which mosquito?

Anopheles. ***Anopheles*** - The larva is characterized by its **orientation parallel to the water surface**, due to the absence of a long breathing siphon. - Presence of **palmate hairs** on the thorax and abdomen helps in flotation at the water surface. *Culex* - The larva of *Culex* mosquitoes typically has a **long, slender breathing siphon** and hangs downwards from the water surface at an angle. - It does not possess the prominent palmate hairs seen in *Anopheles* for surface flotation. *Mansonia* - *Mansonia* larvae are unique because they have a **modified siphon adapted for piercing aquatic plant stems** to obtain oxygen, rather than breathing directly from the surface. - Consequently, they are typically found attached to submerged vegetation and do not float at the water surface. *Aedes* - Similar to *Culex*, *Aedes* larvae possess a **siphon for breathing**, causing them to hang downward from the water surface. - However, the siphon of *Aedes* is generally **shorter and stouter** than that of *Culex*, and they also lack palmate hairs for surface flotation.

Q: Identify the services provided at the clinic represented by the symbol shown in the image below:

RTI/STI. ***RTI/STI*** - The image displays the logo for "Suraksha clinic," which is associated with **sexual health services in India**. - **Suraksha clinics** are dedicated to providing services for **Reproductive Tract Infections (RTIs)** and **Sexually Transmitted Infections (STIs)**, including counseling, diagnosis, and treatment. *Child Survival and Safe Motherhood clinic* - These clinics focus on **maternal and child health**, including antenatal care, safe delivery, immunization, and nutrition for children. - While important public health initiatives, they are not specifically identified by the "Suraksha clinic" branding. *Diarrhea clinic* - Diarrhea clinics primarily address the prevention and treatment of **diarrheal diseases**, often through Oral Rehydration Therapy (ORT) and hygiene promotion. - This is a distinct public health service not directly indicated by the "Suraksha clinic" symbol. *Blood bank services* - Blood banks are specialized facilities for the **collection, processing, testing, and storage of blood** and blood products for transfusions. - This service is entirely separate from the focus of a "Suraksha clinic."

Q: Identify the component of NACP as shown in the image:

PPTCT. ***PPTCT*** - The image depicts a family (father, mother, and child) within the **red ribbon** symbol for HIV/AIDS awareness. This strongly represents the concept of **Prevention of Parent-to-Child Transmission (PPTCT)**, which aims to prevent HIV transmission from an infected mother to her baby. - PPTCT programs include **HIV testing for pregnant women**, antiretroviral therapy for HIV-positive mothers, and safe infant feeding practices. *Ayush* - **AYUSH** refers to traditional Indian systems of medicine (Ayurveda, Yoga, Unani, Siddha, and Homoeopathy) and is not directly represented by the family-and-ribbon imagery in the context of HIV prevention. - While AYUSH may be integrated into some health programs, it is not the primary visual representation for HIV transmission prevention in families. *ICTC* - **Integrated Counseling and Testing Centres (ICTC)** provide voluntary counseling and testing for HIV but primarily focus on individual diagnosis and counseling, not explicitly on preventing transmission within a family unit as depicted. - While ICTC is a component of NACP, the image's emphasis on parents and child more directly aligns with PPTCT. *Blood transfusion* - Measures related to **blood transfusion safety** focus on screening donated blood for HIV to prevent transmission through blood products. - The image does not show any elements related to blood donation, blood bags, or transfusion procedures, making this option less likely.

Q: Identify the symbol as given in the image:

HIV/AIDS. ***HIV/AIDS*** - The **red ribbon** is an internationally recognized symbol of **awareness and solidarity** for people living with HIV/AIDS. - It is worn to visually express compassion for people with AIDS and their caregivers, and to support the prevention of further HIV infection. *Malaria* - The **red cross** on a white background is the traditional symbol for **medical care and humanitarian aid**, not specifically malaria. - While malaria is a significant global health issue, it does not have the red ribbon as its primary symbol. *Leprosy* - There is no universally recognized specific ribbon color or symbol for **leprosy awareness**, unlike the red ribbon for HIV/AIDS. - Awareness campaigns for leprosy often use different designs or general health symbols. *Tuberculosis* - The **Red Cross double bar** or **Cross of Lorraine** is sometimes associated with tuberculosis campaigns, especially in the past. - The red ribbon is not the symbol for tuberculosis.

Q: Identify the symbol in the image:

MDT. ***Correct Answer: MDT (Multi-Drug Therapy)*** - The image depicts a human figure divided into two halves, one red and one orange, against a yellow circle. This specific logo is widely recognized as representing the **Multi-Drug Therapy (MDT)** for leprosy under the National Leprosy Eradication Programme. - The use of two colors symbolizes the different drugs used in combination therapy, and the human figure within a circle represents holistic treatment and the goal of restoring health and dignity to individuals affected by leprosy. - MDT is the cornerstone of leprosy treatment and consists of a combination of rifampicin, dapsone, and clofazimine. *Incorrect: DOTS* - **DOTS (Directly Observed Treatment, Short-course)** is a strategy for tuberculosis control, not leprosy. - The DOTS logo typically focuses on lungs or abstract representations of TB treatment and does not match the image shown. *Incorrect: ART* - **ART (Antiretroviral Therapy)** is used for HIV/AIDS treatment. - ART program logos generally incorporate themes related to HIV/AIDS awareness, often including ribbons or stylized health symbols, which differ from the image provided. *Incorrect: NRHM* - **NRHM (National Rural Health Mission)** is a government initiative in India for strengthening rural healthcare infrastructure. - The NRHM logo typically incorporates national symbols or themes related to rural health and community, such as families or health workers, not the dual-colored human figure shown in the image.

Question 1

Which mosquito larva has no siphon and rests parallel to the water surface?

Accepted Answer

Anopheles

Answer

Aedes

Answer

Mansonia

Answer

Culex

Question 2

Identify the Anopheles mosquito larva from the image shown below:

Accepted Answer

Anopheles

Answer

Larva with long slender air tube at angle to water surface

Answer

Larva with prominent siphon and hair tufts

Answer

Larva with short stout air tube at angle to water surface

Question 3

Which is the mosquito shown in the figure?

Accepted Answer

Aedes

Answer

Culex

Answer

Anopheles

Answer

Mansonia

Question 4

Which is the type of mosquito shown below?

Accepted Answer

Aedes mosquito

Answer

Culex mosquito

Answer

Anopheles mosquito

Answer

Haemagogus mosquito

Question 5

The insect shown in the figure is a vector of which of these diseases?

Accepted Answer

Filaria

Answer

Leishmaniasis

Answer

Yellow fever

Answer

Malaria

Question 6

The larva shown belongs to which mosquito?

Accepted Answer

Anopheles

Answer

Culex

Answer

Mansonia

Answer

Aedes

Question 7

Identify the services provided at the clinic represented by the symbol shown in the image below:

Accepted Answer

RTI/STI

Answer

Child Survival and Safe Motherhood clinic

Answer

Diarrhea clinic

Answer

Blood bank services

Question 8

Identify the component of NACP as shown in the image:

Accepted Answer

PPTCT

Answer

Ayush

Answer

ICTC

Answer

Blood transfusion

Question 9

Identify the symbol as given in the image:

Accepted Answer

HIV/AIDS

Answer

Malaria

Answer

Leprosy

Answer

Tuberculosis

Question 10

Identify the symbol in the image:

Accepted Answer

MDT

Answer

DOTS

Answer

ART

Answer

NRHM

Infectious Diseases — MCQs

Infectious Diseases — MCQs

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