Scrub Typhus Cases Rise in Andhra Pradesh: What Is It & How It Spreads? Symptoms & Prevention Explained

The article reviews scrub typhus in Andhra Pradesh, detailing surveillance data, district-level case counts, rural exposure risks, and guidance on prevention, diagnosis and timely treatment to mitigate mortality.

A middle-aged woman from Mettapalli village in Cheepurupalli mandal, Vizianagaram district, has died while receiving treatment for suspected scrub typhus at a private hospital. The case has renewed concern about scrub typhus in Andhra Pradesh, a seasonal infection that keeps returning during wet months and is now being closely watched by health officials.

Despite public concern after the death, health authorities in Andhra Pradesh say there is no major surge in scrub typhus cases at present. Officials state that talk of a large outbreak is not supported by current data, though they agree that the infection remains a serious risk, especially in rural and farm regions.

Scrub typhus situation in Andhra Pradesh

Government data show that 6,778 samples have been tested for scrub typhus across Andhra Pradesh this year, of which 1,346 were positive. In 2024, laboratories processed 10,150 samples and confirmed 1,613 cases. In 2023, 1,295 infections were detected from 7,281 samples, indicating that the disease has persisted over recent years.

A district-wise review places Chittoor at the top of the chart this year with 384 confirmed scrub typhus cases. Other affected districts include Kakinada with 146 cases, Visakhapatnam with 124, and YSR Kadapa with 97. Officials say these figures reflect both active surveillance and the typical pattern of the infection in different regions.

Scrub typhus patterns in Visakhapatnam and Andhra Pradesh

In Visakhapatnam district, 19 of 210 samples tested in November turned positive for scrub typhus, according to officials. At King George Hospital, Superintendent Dr. I. Vani said three patients admitted with scrub typhus symptoms are stable. The patients are under observation and are expected to be discharged after medical teams complete treatment.

Scrub typhus often affects people living or working in rural, scrubland, and farming zones, especially during monsoon and the following months. The infection is classified as an acute febrile illness and belongs to a broader group of rickettsial diseases. Doctors warn that delayed diagnosis or treatment can lead to serious health problems and even death.

What is scrub typhus in Andhra Pradesh

The disease is caused by the bacterium Orientia tsutsugamushi. It spreads to humans through the bite of infected larval mites, commonly known as chiggers. These mites thrive in grasslands, bushes, and fields. People usually get infected when they brush past vegetation carrying chiggers during farm work, grazing, or other outdoor activity.

Scrub typhus does not pass from one person to another, which means it is not spread through coughing, touching, or sharing food. The risk mainly arises from contact with chigger-infested areas. Farmers, field workers, and people living close to forests or thick vegetation are considered more vulnerable, particularly during monsoon and winter seasons.

Scrub typhus symptoms and prevention in Andhra Pradesh

Symptoms of scrub typhus usually start between 6 and 21 days after the mite bite. Common signs include sudden high fever, severe tiredness, headache, chills, dry cough, and swollen lymph nodes. A dark scab at the bite site, known as an eschar, is often seen and can help doctors suspect scrub typhus early.

Serious illness can develop if treatment is delayed, leading to breathing problems, organ failure, or shock. Doctors advise urgent medical care if a fever lasts beyond three to five days, especially when there is a rash, swollen glands, or extreme weakness. This advice is particularly important for people in villages or areas near forests and fields.

Health experts recommend several steps to reduce the chance of scrub typhus. People visiting farms, fields, or forested areas are advised to wear full-sleeved shirts and long trousers. Insect repellent should be applied on exposed skin and clothing. Sitting or lying directly on grass is discouraged, and surroundings should be kept clean with bushes trimmed or cleared.

After outdoor visits, doctors suggest taking a bath and washing clothes to remove any mites that may be clinging to the body or fabric. Farmers and agricultural labourers are urged to stay extra careful during monsoon and winter, when chigger activity is higher. Early awareness and swift testing remain key to lowering deaths linked to scrub typhus.

Scrub typhus history in India and Andhra Pradesh

Scrub typhus is not new to India and has been reported for decades across many states. Documented cases come from Himachal Pradesh, Tamil Nadu, Karnataka, Assam, Maharashtra, Andhra Pradesh, and Odisha. Several outbreaks have been recorded in Himachal Pradesh and southern states, most often around the monsoon period and soon after heavy rains.

Doctors stress that scrub typhus can be treated with timely antibiotics, but delays in identifying the illness continue to pose a challenge in many regions. The recent death in Vizianagaram highlights the need for steady surveillance, quick testing, and public awareness across Andhra Pradesh, so that seasonal spikes in scrub typhus do not lead to avoidable loss of life.

Q&A

What exactly is scrub typhus?

Scrub typhus is a bacterial infection caused by Orientia tsutsugamushi. It belongs to the rickettsial group of diseases and is primarily found in rural, scrubland, and forested regions. If not diagnosed and treated early, it can lead to severe complications, but it is fully treatable with appropriate antibiotics.

How does scrub typhus spread?

• Scrub typhus spreads only through the bite of infected larval mites, commonly called chiggers.
• These mites thrive in bushes, grasslands, and agricultural areas.
• Humans get infected accidentally when they come in contact with vegetation that harbours chiggers.
• The disease does not spread from person to person.

Q4. What are the symptoms of scrub typhus?

• Symptoms usually appear 6-21 days after the bite. Early identification is crucial.
• Common symptoms include:
• High fever
• Severe headache
• Body pain and fatigue
• Chills
• Dry cough
• Rash
• Swollen lymph nodes
• A dark, crusted scab at the bite site (eschar) - a key indicator
• In late or untreated cases: breathing difficulty, organ failure, shock

What are the current infection numbers in Andhra Pradesh?

According to the state health department:

• 2025: 1,346 positive cases out of 6,778 samples
• 2024: 1,613 cases from 10,150 samples
• 2023: 1,295 cases from 7,281 samples

District-wise (2025):

• Chittoor: 384 cases
• Kakinada: 146
• Visakhapatnam: 124
• YSR Kadapa: 97

Who is at higher risk of scrub typhus?

The risk is higher for:

• Farmers and field workers
• People living near forested or scrub-covered areas
• Children playing outdoors
• Campers, trekkers, and outdoor travellers
• Those working in gardens or farmlands during monsoon and winter

How can scrub typhus be prevented?

• There is no vaccine, so prevention depends on avoiding mites:
• Wear full-sleeved clothing when outdoors.
• Use DEET-based insect repellents on skin and clothing.
• Avoid sitting or lying on grass or leaves.
• Keep surroundings clean and remove dense shrubs where mites breed.
• Farmers should wear boots and gloves while working in fields.
• Take a bath after returning from agricultural or bushy areas.
• Wash clothes in hot water if possible.

How is scrub typhus treated?

• Treatment is straightforward if detected early.
• Doctors typically prescribe doxycycline or azithromycin, which are highly effective. Most patients recover within a few days of starting medication.
• Delayed diagnosis, however, can lead to lung infection, liver issues, neurological symptoms, or multi-organ failure, making early testing essential.

What is India's history with scrub typhus outbreaks?

Scrub typhus has been present in India for decades. Major clusters have been reported in:

• Himachal Pradesh
• Tamil Nadu
• Karnataka
• Assam
• Odisha
• Maharashtra
• Andhra Pradesh

Himachal Pradesh, in particular, has reported higher fatality rates during monsoons. Southern states have been recording cases annually. While not new, more awareness and quicker testing in recent years have improved outcomes.

When should someone get tested or seek emergency care?

Immediate medical attention is needed if someone has:

• Fever lasting more than 3-5 days
• Rash and swollen lymph nodes
• An eschar at any part of the body
• Persistent weakness or breathlessness
• Exposure to farms, fields, forested areas, or outdoor vegetation in the last 2-3 weeks
• Early treatment drastically reduces complications.