Beta-thalassemia
(β-) is an inherited blood disorder, a form of thalassemia resulting in variable outcomes ranging from clinically to severely anemic individuals. It is caused by reduced or absent of the beta chains of , the molecule that carries oxygen in the blood. Symptoms depend on the extent to which hemoglobin is deficient, and include , pallor, tiredness, enlargement of the , , and . In severe cases death ensues.
Underlined words are explained — tap any of them.
Symptoms — what it feels like
- ·, enlarged , abnormal bone structure
Causes — why it happens
- · in the gene
How it's found
- ·Blood smear, electrophoresis, iron & ferritin tests, DNA analysis
Prevention
- ·Preconception counseling
Treatment
- ·Blood , iron chelation, stem cell , gene therapy
The sections below are general education drawn from public guidelines (NHS, Mayo, CPIC, WHO, ICMR). They are not individually reviewed by a clinician and are not medical advice — always talk to a doctor about your own health.
When to see a doctor
See a doctor if you or your child are often pale, very tired, slow to grow, or short of breath, or if anaemia keeps coming back. If you and your partner are planning a family and thalassaemia runs in either family, ask about carrier testing.
Get urgent care for severe breathlessness, a fast or pounding heart, fainting, or a swollen painful tummy. These can mean severe anaemia or other complications that need quick treatment.
General guidance, not a diagnosis. When in doubt, see a doctor.
Questions to ask your doctor
- ?Which blood tests confirm this and show how severe it is?
- ?Are my partner and I carriers, and what does that mean for children?
- ?What ongoing care or monitoring will be needed?
- ?Which symptoms mean I should seek care quickly?
- ?Should other family members be tested?
- ?Which specialists should be involved?
What to note before your visit
- ·when tiredness or pale skin started
- ·family history of thalassaemia or anaemia
- ·any past blood test or transfusion history
- ·current medicines and supplements
Myths vs facts
Across the other high- (india) gene set (), 5 -'' are actually seen in South Asians () - many European-absent and still clinically 'uncertain'. For , that's a pool of computationally-damaging, India-relevant, clinically-unresolved variants no one has systematically characterised.
A study that would help: Take the South-Asian-observed, European-absent, ClinVar-uncertain in and them for : functional or family segregation to move them from 'uncertain' to a real call. Each is a usable diagnostic result.
The world's heaviest thalassemia burden — preventable, and genetically India-specific
India carries one of the largest burdens on Earth: about 3.7% of the population are (up to 6.5% in Punjab), and an estimated 10,000+ children are born with major every year. In the east — Bengal and Assam — HbE is the , with carrier rates reaching ~24% in parts of Assam.
This is a disease you prevent with carrier before , not one you cure. The is India-specific — IVS1-5, HbE and others — so screening panels must be tuned to Indian , not imported wholesale from Western references.
Carrier rates and major are well mapped. The gap is coverage and action: programs reach only a fraction of couples, and regional differences (HbE in the east, beta-thal in the north/west) need local .
A regionally-tuned carrier- rollout that measures how many at-risk couples are identified before — the intervention that actually lowers the birth , matched to each region's mix.
- Colah et al., 'Burden of thalassemia in India: the road map for control', 2017 ↗
- Prevalence of beta-thalassemia carriers in India: systematic review & meta-analysis, 2023 ↗
- D2I2 rare-pathogenic South-Asian scan (HBB)