AI Summary Overview
What is Scabies?
Scabies is caused by the human itch mite, Sarcoptes scabiei var. hominis. The female mite enters the outermost layer of the skin, where it creates a small tunnel and lays eggs. The body develops an allergic and immune reaction to the mites, eggs and waste products, leading to itching and a characteristic rash.
Scabies usually spreads through prolonged direct skin contact. Transmission through clothing, towels or bedding is less common in ordinary scabies, but it can occur in crusted scabies, as the number of mites is much higher.
A person can carry scabies before symptoms become noticeable. During a first infestation, itching and rash may take several weeks to appear. Symptoms usually develop more quickly if a person has had scabies before, as the immune system is already sensitive to the mite.
What are the Types of Scabies?
Scabies can present in different clinical forms. The main types of scabies are mentioned below:
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Classic Scabies Classic scabies is the most common form. It usually causes intense itching that becomes worse at night, along with small itchy bumps and thin, irregular burrows. Common areas include the spaces between the fingers, wrists, elbows, armpits, waist, buttocks, groin and genital area. Most people with classic scabies carry only a small number of mites. Even with a low mite burden, the immune response can produce widespread itching and rash.
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Crusted Scabies Crusted scabies is a severe and highly contagious form in which very large numbers of mites multiply in the skin. It is more likely to occur in people with weakened immunity, certain neurological or cognitive conditions, severe physical disability or difficulty scratching. However, it can occasionally occur without an obvious risk factor. The skin may develop thick, scaly or crusted plaques, often involving the hands, feet, elbows, knees, scalp or nails. Itching may be mild, absent or still present. Since the mite burden can be extremely high, crusted scabies spreads more easily through both direct contact and contaminated clothing, bedding or furniture.
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Nodular Scabies Nodular scabies causes persistent, very itchy red-brown or skin-coloured nodules. These commonly occur around the groin, buttocks, genital area or armpits. In children, the nodules may also appear on the trunk or limbs. The nodules can remain for weeks or months even after the mites have been successfully eliminated. Their persistence does not necessarily mean that active infestation is still present.
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Bullous Scabies Bullous scabies is a rare presentation in which blisters develop, usually in older adults. It can resemble other blistering skin disorders and generally requires medical evaluation to confirm the diagnosis.
How Common is Scabies in India?
Scabies occurs in India, but there is no single reliable nationwide prevalence estimate that represents the entire population. Prevalence rates can vary considerably by age group, community, living conditions and study setting.
What are the Stages of Scabies?
Scabies follows a recognisable course after an individual is exposed to the scabies mite. However, these stages may not necessarily affect all infected individuals similarly.
The table below describes the potential stages that scabies progresses through and their common features:
| Stage | Features |
| Stage 1: Exposure and Incubation | Mite infestation occurs by close physical contact; no signs have appeared yet; the incubation period is 2 to 6 weeks in a primary infection and 1 to 4 days in a secondary infection |
| Stage 2: Mite Burrowing | Female mites dig under the skin and produce eggs; thin and wavy lines (burrows) are seen on the skin surface, especially between fingers and the wrists |
| Stage 3: Immune Response and Itch Onset | Immune response to mites, their eggs, and feces develops; severe itching starts, mainly at night |
| Stage 4: Rash Development | Red rash in the form of pimples appears in the burrow area and other places; papules, vesicles, and nodules can also occur |
| Stage 5: Secondary Complications | Scratching leads to skin lesions, secondary bacterial infection (impetigo), and systemic problems if not treated |
For people who have suffered from scabies before, symptoms will develop much faster, usually after one to four days, due to sensitisation of the immune system to scabies mites.
What are the Symptoms of Scabies?
The most common symptom of scabies is intense itching, particularly at night. Other symptoms can include small itchy bumps, a rash and thin burrow lines on the skin. During a first infestation, symptoms may take several weeks to appear, while they can develop much sooner in someone who has had scabies before.
The table below lists the early warning signs and advanced stage symptoms of scabies:
| Early Warning Signs | Advanced Stage Symptoms |
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Diseases Similar to Scabies
Scabies can resemble several itchy skin conditions, particularly eczema and psoriasis. The pattern of itching, the distribution of lesions, the presence of burrows, and the history of close contact can help distinguish them.
A comparison of these three conditions is given in the table below for better understanding:
Scabies Vs. Eczema Vs. Psoriasis
| Feature | Scabies | Eczema | Psoriasis |
| How It Happens | Infestation by the human itch mite | Inflammatory skin disorder influenced by skin barrier, immune, genetic and environmental factors | Chronic immune-mediated condition causing accelerated skin cell turnover |
| Location | Finger webs, wrists, armpits, waist, groin, buttocks and genital area; distribution varies with age | Commonly affects skin folds, hands, face or other areas depending on age and type | Commonly affects scalp, elbows, knees, lower back and sometimes nails |
| Associated Symptoms | Severe itching, often worse at night; papules and sometimes burrows | Dry, inflamed, itchy, cracked or weeping skin | Well-defined scaly plaques; itching may occur; nail or joint involvement is possible |
| Contagious? | Yes, mainly through prolonged skin contact | No | No |
| Can It Be Treated? | Yes. Correct treatment can eliminate the mites | Usually controlled with ongoing skin care and treatment | Usually controlled with treatment; relapses can occur |
Night-time itching is strongly associated with scabies, but it is not exclusive to scabies. Eczema and other itchy conditions may also disturb sleep.
What Causes Scabies?
Scabies develops when a fertilised female mite burrows into the outer layer of the skin and lays eggs. The immune system then reacts to the mites and their products, producing itching and inflammation.
The causes of scabies are given below:
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Mite Infestation: Human scabies begins when the scabies mite reaches the skin and establishes an infestation.
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Burrowing and Egg Laying: Female mites create superficial burrows and lay eggs within the outer skin layer.
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Immune Reaction: Itching and rash mainly result from the body's hypersensitivity response to mites, eggs and mite waste.
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Reinfestation Response: People who have had scabies before often develop symptoms more quickly after another exposure because their immune system is already sensitised.
What are the Risk Factors for Scabies?
Anyone can develop scabies after sufficient exposure to an infested person. Some factors increase the chance of transmission, while others increase the risk of severe or crusted disease.
The risk factors are given below:
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Young or Older Age: Children and older adults can be more vulnerable to scabies in settings where close contact is frequent.
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Weakened Immunity: People with significant immune suppression have a higher risk of crusted scabies.
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Neurological or Cognitive Conditions: Conditions that reduce awareness of itching or the ability to scratch may allow mite numbers to increase.
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Physical Disability or Frailty: People who require close personal care may have greater exposure and may also be at increased risk of crusted disease.
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Prolonged Skin-to-Skin Contact: Living with, caring for or having intimate contact with someone who has scabies increases the risk.
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Crowded Living Conditions: Frequent close physical contact can make transmission easier.
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Shared Bedding or Clothing: This is a less common route in classic scabies but can contribute to transmission in crusted scabies.
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Untreated Close Contacts: Treating only one affected person can lead to reinfestation within a household.
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Delayed Diagnosis or Treatment: Ongoing untreated infestation allows continued transmission to others.
Scabies is not a sign of poor hygiene. Good personal cleanliness does not reliably prevent infestation after prolonged exposure.
What are The Complications of Scabies?
Scabies is usually curable, but repeated scratching and severe infestation can sometimes lead to complications, especially if treatment is delayed.
Untreated scabies can lead to the following:
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Secondary Bacterial Infection: Scratching can break the skin and allow bacteria to enter, leading to infections such as impetigo.
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Cellulitis: Infection may spread into deeper layers of the skin, causing redness, warmth, swelling and pain.
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Skin Sores and Crusting: Persistent scratching can cause open sores, scabs and skin damage.
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Kidney Complications: Certain bacterial skin infections associated with scabies can occasionally lead to kidney inflammation.
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Sepsis: Severe bacterial infection may spread into the bloodstream, particularly in people with crusted scabies or weakened immunity.
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Crusted Scabies: This severe form involves a very high number of mites and can spread rapidly to others. It requires prompt medical treatment.
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Sleep and Daily-Life Problems: Persistent night-time itching can disturb sleep and affect concentration, mood and daily activities.
When Should I See a Healthcare Provider?
You should seek medical advice if you or your child experiences any or multiple of the following:
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Intense or persistent itching, especially at night
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A new widespread itchy rash
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Visible burrows or lesions in typical scabies locations
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Thick, crusted or heavily scaly skin
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Painful, warm, swollen or pus-filled sores
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Fever or other symptoms suggesting a spreading skin infection
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New burrows or new lesions after completing treatment
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Symptoms that continue or worsen for several weeks after treatment
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Possible scabies in a baby or very young child
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Scabies during pregnancy, when the treatment choice needs review
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A weakened immune system or a condition associated with crusted scabies
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Suspected crusted scabies
People with crusted scabies require prompt medical care because the condition is highly contagious and can be more difficult to treat.
How is Scabies Diagnosed?
Scabies is often diagnosed from the combination of symptoms, lesion distribution, contact history and examination findings. Intense night-time itching, similar symptoms in household members and characteristic burrows can strongly support the diagnosis.
The doctor may conduct the following assessments and tests to diagnose scabies:
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Medical History and Clinical Examination A healthcare professional may ask when the itching began, whether it becomes worse at night and whether household or close contacts have similar symptoms. The skin is examined for burrows, papules, nodules, vesicles and scratch marks. Typical sites include the finger webs, wrists, elbows, armpits, waist, buttocks, groin and genital area. Infants, young children, older adults and people with crusted scabies may have a different distribution, including the scalp, face, palms or soles.
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Dermoscopy Dermoscopy uses a magnifying device to inspect suspicious lesions more closely. It can help identify a mite at the end of a burrow and can guide sampling from the most suitable area.
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Skin Scraping and Microscopy A small sample may be taken from a suspected burrow or lesion and examined under a microscope for mites, eggs or faecal material. Finding these confirms the diagnosis. However, a negative skin scraping does not completely rule out scabies because only a small number of mites may be present in classic disease and the sampled area may not contain one.
Diagnostic Summary Table
| Assessment or Test | What It Assesses | When It May Be Used |
| Medical history and clinical examination | Typical itch, rash, burrows, lesion distribution and contact history | Main assessment for suspected scabies |
| Dermoscopy | Features suggesting a mite or burrow | Supports rapid examination and targeted sampling |
| Skin scraping and microscopy | Mites, eggs or faecal material | Confirms scabies when positive |
| Additional specialist testing | Atypical findings or alternative diagnoses | Selected difficult or uncertain cases |
How is Scabies Treated and Managed?
Treatment of scabies aims to eliminate the mites, control symptoms, treat any secondary infection and prevent reinfestation. Close household and sexual contacts generally need treatment at the same time, even if they do not yet have symptoms, because symptoms can be delayed.
The management and treatment approaches of scabies are given below:
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Topical Treatment Topical treatment is commonly used for classic scabies to eliminate the mites and control the infestation. Treatment may need to be repeated after about one week. Correct use is important, as missed areas, insufficient treatment or untreated close contacts can lead to treatment failure or reinfestation.
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Oral Treatment Oral treatment may be used when topical treatment is unsuitable, difficult to apply, unsuccessful, or when crusted scabies is present. The suitability depends on age, body weight, pregnancy status, other medical conditions and clinical circumstances. It should therefore be prescribed by a healthcare professional rather than used without medical advice.
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Treatment of Crusted Scabies Crusted scabies requires more intensive treatment because of the very high mite burden. Management commonly combines oral ivermectin with repeated topical treatment. Thick crusts may also be softened by using keratolytic treatment so that anti-scabies medicine can reach the skin more effectively.
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Treating Secondary Infection and Persistent Itching Bacterial skin infections caused by scratching may require antibiotics when clinically indicated. Antihistamines or suitable topical anti-inflammatory treatments may sometimes be used to reduce itching. Itching can continue after successful mite treatment because the immune reaction takes time to settle. Persistent itch alone does not always indicate treatment failure.
Common Medicines Used to Treat Scabies
Medicines for scabies either kill the mites or help manage symptoms and complications. Treatment should be chosen according to age, pregnancy status, body weight, severity and other medical conditions.
Common medicines that may be prescribed by doctors to treat scabies are listed below:
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Permethrin 5% Cream: A commonly used topical anti-scabies medicine. It is usually applied over the required skin surface for several hours and commonly repeated after about one week.
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Oral Ivermectin: A systemic anti-parasitic medicine used in selected cases, including some treatment failures and crusted scabies. Repeat dosing is usually required.
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Benzyl Benzoate: A topical alternative that can kill scabies mites but may cause skin irritation in some people.
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Sulphur Preparations: Topical sulphur can be used as an alternative in selected patients when other medicines are unsuitable.
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Antihistamines: These may help reduce itching, but do not kill scabies mites.
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Antibiotics: Topical or oral antibiotics may be prescribed if a secondary bacterial skin infection develops. They do not treat the mite infestation itself.
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Keratolytic Treatments: These may be used in crusted scabies to soften thick scales and improve penetration of anti-scabies medicines.
Pregnant women, infants, young children and people with significant medical conditions should obtain medical advice before treatment. Close contacts should be treated at the same time to reduce the chance of reinfestation.
Note: Medicines should be taken only under the supervision of a doctor or qualified healthcare professional.
Living with Scabies: Daily Challenges and Caregiving
Scabies is usually temporary and curable. But the itching, need to treat close contacts and household cleaning can interfere with sleep, work, school and family life.
Some of the challenges and critical care points for scabies are given below:
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Challenges
- Sleep Disturbance: Severe nighttime itching can interrupt sleep and cause daytime tiredness or irritability.
- Stigma and Embarrassment: Scabies is sometimes incorrectly associated with poor hygiene, which can lead to embarrassment or delayed treatment.
- Reinfestation: Scabies can return when close contacts remain untreated or when treatment instructions are not followed correctly.
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Patient Well-Being
- Treat Close Contacts Together: Household members and other close contacts may need treatment at the same time, even if symptoms have not appeared.
- Avoid Close Contact Temporarily: Avoid prolonged skin-to-skin and sexual contact until effective treatment has begun and the advised contact-restriction period has passed.
- Manage Clothing and Bedding: Wash recently used clothes, towels and bedding using a hot cycle when possible. Items that cannot be washed can be sealed away for several days.
- Protect Damaged Skin: Keep nails short and try to avoid scratching because broken skin can become infected.
- Watch for Infection or Treatment Failure: Seek medical advice for increasing redness, warmth, swelling, pus, fever, new burrows or continuing new lesions after treatment.
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Expenses
- Medical Expenses: Costs may include doctor consultations, anti-scabies medicines, itch-relieving treatments and antibiotics if a secondary infection occurs.
- Household and Indirect Costs: Families may incur laundry expenses and temporary loss of work or school time, particularly when several household members require treatment.
What is the Prognosis for Scabies?
The prognosis for scabies is generally favourable when the condition is diagnosed correctly and treatment is completed as directed. Most uncomplicated cases can be successfully treated without hospitalisation.
Itching and skin irritation may continue for several weeks after the mites have been eliminated. This is known as post-scabetic itch and does not automatically mean that treatment has failed. The skin may need time to recover from the immune reaction and repeated scratching.
Recovery can be influenced by the form of scabies, immune status, correct application of treatment, treatment of close contacts, reinfestation risk and the presence of secondary bacterial infection.
Crusted scabies usually requires more intensive and prolonged management. Reassessment is important if new burrows continue to appear, new lesions develop after treatment or symptoms fail to improve over the expected recovery period.
How Can I Prevent Scabies?
Scabies spreads mainly through prolonged skin-to-skin contact and, less commonly, through contaminated clothing or bedding. The following measures can help reduce transmission of scabies:
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Avoid prolonged skin-to-skin contact with a person who has scabies until treatment has been completed.
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Treat household members and other close contacts at the same time to reduce the risk of reinfestation.
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Wash recently used clothing, towels and bedding in hot water and dry them thoroughly on a hot setting.
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Seal items that cannot be washed in a plastic bag for several days to one week.
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Avoid sharing clothing, towels, bedding and other personal items with an infected person.
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Clean and vacuum frequently used rooms and surfaces, especially when managing crusted scabies.
Seek prompt diagnosis and treatment to reduce the risk of spreading scabies to others.
Scabies Treatment Cost in India
Scabies treatment costs in India vary according to the city, healthcare provider, medicine brand, number of household members requiring treatment and whether complications are present. Most uncomplicated cases are managed on an outpatient basis and are relatively inexpensive compared with conditions requiring hospital admission.
An approximate overview of scabies treatment cost is given below:
| Treatment Component | Approximate Cost Range |
| General physician or dermatologist consultation | ₹300 - ₹2,000 per visit |
| Permethrin 5% cream | Around ₹40 - ₹150 per tube |
| Oral ivermectin | Around ₹20 - ₹100 |
| Antihistamines or other itch-relieving medicines | ₹30 - ₹150 per treatment course |
| Skin scraping or microscopy | ₹200 - ₹800 |
| Dermoscopy | ₹300 - ₹1,500 per session |
| Antibiotic treatment for secondary infection | ₹100 - ₹500 per treatment course |
| Hospital care for severe complications or crusted scabies | ₹5,000 to ₹10,000 per day |
Note: The above-mentioned prices are estimates. Medicine prices change by brand, pharmacy, dose and pack size. Severe bacterial infection or crusted scabies can increase costs because repeated consultations, additional medicines, investigations or hospital care may be needed.
Does Health Insurance Cover Scabies in India?
Yes. Health insurance covers medical expenses incurred on the treatment of scabies. Coverage usually includes in-patient care along with pre-hospitalisation and post-hospitalisation expenses. Since uncomplicated scabies is usually treated on an outpatient basis with consultations and prescription medicines, the treatment cost may be covered only if the policy comes with the OPD benefit.
Besides, an initial waiting period may apply before any claim for scabies or secondary infection can be raised. Make sure to read the policy documents carefully before making a claim or purchasing a policy to know about the inclusions, exclusions, waiting periods, co-payments, sub-limits and outpatient coverage.
How Much Health Insurance Coverage is Needed for Scabies Treatment?
Scabies alone usually does not require a disease-specific health insurance amount because most uncomplicated cases are inexpensive and treated outside the hospital. Health insurance coverage should therefore be chosen based on the person's broader healthcare needs rather than the cost of routine scabies treatment.
Nonetheless, a medical coverage of around ₹5 - ₹10 lakh is usually recommended for general healthcare needs, including scabies treatment. A higher coverage of ₹15 lakh or more may be considered for better protection against major hospitalisation expenses.
Frequently Asked Questions (FAQs)
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Q1. What is the most common initial symptom of scabies?
Ans: Intense itching, especially at night, is the most characteristic symptom of scabies. Small itchy bumps and burrows may also appear. -
Q2. How long does scabies last?
Ans: Scabies can be successfully treated, but itching may continue for several weeks after the mites have been eliminated. -
Q3. Can scabies occur in adults?
Ans: Yes. Scabies can affect people of any age, including adults. It usually spreads through prolonged skin-to-skin contact, including close or intimate contact.
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References
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https://www.nhp.gov.in/disease/scabies
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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11981167/
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https://www.pharma-dept.gov.in/
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https://www.icmr.gov.in/icmrobject/uploads/STWs/1725967365_scabies.pdf
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https://ckbirlahospitals.com/bmb/billing
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