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What an infectious disease specialist does

An infectious disease (ID) physician diagnoses and treats infections caused by bacteria, viruses, fungi and parasites, especially complicated, prolonged or drug-resistant ones. Training is MD in Medicine followed by a DM or fellowship in Infectious Diseases. ID doctors also advise hospitals on antibiotic use and infection control, which is crucial because antimicrobial resistance is a serious problem in India.

When to see an ID specialist

• Fever lasting more than two weeks without a clear cause.
• Tuberculosis, especially drug-resistant TB, or TB with HIV.
• HIV infection and prevention, including PrEP and PEP.
• Hepatitis B or C, typhoid, malaria, dengue and other tropical infections.
• Infections that do not respond to usual antibiotics, or hospital-acquired infections.
• Illness after travel, fungal infections and infections in people with weak immunity.
• Vaccine advice for adults and travellers.

Diagnosis

Doctors rely on history, examination and tests such as blood and urine cultures, CBC, CRP, procalcitonin, serology, PCR and TB tests, along with imaging. A key skill is deciding when antibiotics are truly needed, which drug and for how long, and when to stop: the aim is to treat the infection while protecting against resistance and side effects.

Prevention

Vaccination, hand hygiene, safe water and food, mosquito control, safe injection practices and prompt treatment of TB prevent many infections. Never take antibiotics without a prescription or stop a course early without advice.

Fees and choosing

Consultation fees commonly range from about ₹700 to ₹2,000 and may vary. ID specialists are mostly based at larger hospitals; online consultation can help with second opinions on complex or resistant infections. Compare specialists and book on Lab Dekho.

Trusted References

This guide is original content informed by recognised medical and public-health sources. For further reading:

• NABH – hospital accreditation standards
• NABL – laboratory accreditation
• Ayushman Bharat PM-JAY
• Ministry of Health & Family Welfare
• Mayo Clinic – Patient care & health information
• Cleveland Clinic – Health Library
• WebMD – Health A–Z

Disclaimer: This guide is for general information and does not replace advice from a qualified doctor. Costs and fees are approximate and vary by provider. Institution names are given for orientation only; check current services and timings directly. In an emergency, call 108 or 112.