Genetic, Infectious & Metabolic Neurology Tests in Chandigarh

Beyond Autoimmune Testing — Infections, Genetics, and Metabolism

Not every neurological condition stems from the immune system attacking itself. Many serious conditions arise from infections reaching the central nervous system, inherited genetic mutations, or metabolic imbalances affecting how the brain and nerves function. This guide covers the specialised tests Altus Lab offers across these three distinct categories.

If your neurologist suspects an antibody-mediated condition instead, such as NMO, myasthenia gravis, or multiple sclerosis, read our companion guide to autoimmune neurology tests covering that separate panel.

Dr. Alok Gupta, MD Pathology, Ex-PGIMER Chandigarh, supervises every test here, with sample collection coordinated across Chandigarh, Mohali, and Panchkula for blood-based tests and alongside your treating specialist for CSF-based testing.

MTB PCR (CSF) – TB Meningitis Test Chandigarh

MTB PCR on cerebrospinal fluid detects the genetic material of Mycobacterium tuberculosis directly within CSF, offering a much faster diagnostic path than traditional TB culture, which can take several weeks to produce results. This speed matters enormously, since TB meningitis progresses rapidly and requires urgent treatment to prevent severe, often permanent, neurological damage.

Doctors order this test whenever a patient presents with symptoms like persistent headache, fever, neck stiffness, and altered consciousness, particularly in regions where tuberculosis remains common. Delayed diagnosis here carries serious consequences, making rapid, accurate PCR testing genuinely life-saving rather than simply diagnostic.

At Altus Lab, we understand the urgency behind this test and prioritize rapid processing whenever a treating physician flags a case as time-sensitive, since starting anti-tuberculosis treatment promptly directly influences whether a patient recovers fully or experiences lasting neurological complications.

GeneXpert Ultra – TB PCR Test Chandigarh

GeneXpert Ultra represents a more advanced, highly sensitive PCR technology specifically designed to detect even very small amounts of tuberculosis bacteria in CSF samples, catching cases that older testing methods might miss, particularly in early-stage TB meningitis when bacterial counts remain low.

This enhanced sensitivity matters because early TB meningitis often presents with mild or non-specific symptoms, precisely when catching the diagnosis makes the biggest difference to long-term outcomes. GeneXpert Ultra also provides results considerably faster than traditional culture methods, typically within hours rather than weeks.

At Altus Lab, we offer GeneXpert Ultra testing for cases where standard MTB PCR results remain inconclusive despite strong clinical suspicion, or when a treating physician specifically requests this more sensitive technology from the outset, given how much early, accurate diagnosis matters for this serious condition.

TB Gold Plus / QuantiFERON Gold

TB Gold Plus, also known as QuantiFERON Gold, is a blood test that detects immune system exposure to tuberculosis bacteria, distinguishing genuine TB infection from prior BCG vaccination, a distinction that older skin-based TB tests often struggle to make accurately.

While this test cannot confirm active TB meningitis on its own, it provides valuable supporting evidence when combined with CSF-based testing and clinical symptoms, particularly useful for identifying whether a patient has ever been exposed to TB, information that shapes how doctors interpret other test results.

At Altus Lab, we often recommend this test alongside CSF-based TB testing for a more complete diagnostic picture, since understanding a patient’s TB exposure history helps neurologists and infectious disease specialists interpret ambiguous or borderline CSF findings with greater clinical confidence.

Neurotropic Panviral Multiple PCR

Neurotropic Panviral Multiple PCR simultaneously screens for several viruses known to specifically target the nervous system, including herpes simplex virus, varicella-zoster virus, and other neurotropic viruses, all from a single CSF sample, rather than requiring separate tests for each individual virus.

This comprehensive approach saves valuable time during an acute presentation, since viral encephalitis requires urgent antiviral treatment, and waiting for sequential individual test results could dangerously delay appropriate care. Herpes simplex encephalitis in particular carries severe consequences if treatment is delayed even by a day or two.

At Altus Lab, we prioritise rapid processing for this panel whenever a physician suspects viral encephalitis based on symptoms like fever, altered consciousness, and seizures, recognising that starting antiviral treatment promptly, sometimes even before results return, can meaningfully change a patient’s long-term outcome.

CSF Measles Viral Load Index (SSPE)

This specialised test measures measles-specific antibody levels within CSF compared to serum, used specifically to diagnose Subacute Sclerosing Panencephalitis, a rare but devastating progressive brain condition that develops years after an initial measles infection, particularly in children who had measles at a very young age.

SSPE typically presents with gradual cognitive decline, behavioural changes, and eventually severe neurological deterioration, symptoms that can initially seem unrelated to a measles infection from years earlier. This delayed connection often makes SSPE genuinely difficult to suspect without specifically considering this rare complication.

At Altus Lab, we recommend this test whenever a child or young adult presents with unexplained, progressive cognitive and behavioural decline, particularly with a history of measles infection, since early recognition, while SSPE remains ultimately difficult to treat, still meaningfully shapes management and family counselling.

Movement Disorder Testing Panel

The Movement Disorder Testing Panel combines several markers relevant to conditions causing abnormal, involuntary movements, including tremors, rigidity, and coordination problems. This panel helps neurologists distinguish between different underlying causes, since movement disorders can stem from genetic, metabolic, or neurodegenerative origins, each requiring distinctly different management.

This testing becomes particularly valuable for younger patients presenting with movement symptoms, since conditions typically associated with older age can occasionally present earlier, and identifying a specific underlying cause opens the door to targeted treatment rather than purely symptomatic management.

At Altus Lab, we work closely with movement disorder specialists to ensure this panel covers the specific markers relevant to each patient’s presentation, since movement disorders represent a genuinely broad category where precise diagnosis substantially influences long-term treatment planning and prognosis discussions with families.

Genetic Testing for SCA (Spinocerebellar Ataxia)

Spinocerebellar Ataxia genetic testing identifies specific inherited mutations responsible for this group of conditions causing progressive coordination problems, balance difficulties, and slurred speech. Since multiple distinct genetic subtypes exist, each caused by different mutations, this testing helps pinpoint exactly which subtype a patient carries.

This distinction matters significantly for families, since different SCA subtypes carry different inheritance patterns, different rates of progression, and different implications for family planning and genetic counselling for other family members who may wish to know their own risk status.

At Altus Lab, we recommend this genetic testing for patients presenting with progressive, unexplained coordination and balance problems, particularly when a family history suggests a possible inherited pattern, since confirming the specific genetic subtype provides crucial information for both the patient and their extended family.

Spinal Muscular Atrophy (SMA) – Genetic Test Chandigarh

Spinal Muscular Atrophy genetic testing identifies mutations in the SMN1 gene responsible for this serious condition causing progressive muscle weakness and wasting, most severely affecting infants and young children, though milder forms can present later in life with slower progression.

This test has become increasingly critical as effective SMA treatments have emerged in recent years, treatments that work significantly better when started early, before extensive muscle and motor neuron damage occurs. Consequently, early genetic diagnosis, sometimes even before symptoms fully develop, can dramatically change a child’s outcome.

At Altus Lab, we recommend this test for infants showing signs of muscle weakness, delayed motor milestones, or reduced muscle tone, and for families with a known history of SMA considering future pregnancies, since early, accurate genetic diagnosis has never mattered more given today’s treatment options.

Huntington’s Chorea – CAG Repeat Analysis

Huntington’s Disease genetic testing analyses the number of CAG repeats within a specific gene, since an abnormally expanded repeat count directly causes this progressive condition affecting movement, cognition, and behaviour, typically emerging in mid-adulthood, though the exact age of onset varies based on repeat length.

This test carries significant emotional weight, since Huntington’s Disease is inherited in a pattern where each child of an affected parent has a 50 percent chance of carrying the mutation, and testing can be pursued either for diagnostic confirmation in someone with symptoms, or predictively in someone at risk but currently symptom-free.

At Altus Lab, we understand this testing often comes with complex emotional and family considerations. We strongly recommend genetic counselling alongside testing, particularly for predictive testing in asymptomatic individuals, ensuring patients and families receive appropriate support throughout this significant decision and its results.

IgG4 (Immunoglobulin G Subclass 4)

IgG4 testing measures a specific antibody subclass associated with IgG4-related disease, a condition where excessive IgG4 production causes inflammation and tissue damage across multiple organs, including, in some cases, the nervous system, where it can cause symptoms mimicking other neurological conditions.

This test becomes relevant when a patient presents with unexplained inflammatory symptoms affecting multiple organ systems alongside neurological involvement, since IgG4-related disease can be genuinely difficult to recognise without specifically considering it, given how closely it can mimic other autoimmune and inflammatory conditions.

At Altus Lab, we recommend IgG4 testing as part of a broader diagnostic workup whenever unexplained, multi-system inflammation accompanies neurological symptoms, since identifying this treatable condition correctly can meaningfully change the treatment approach compared to managing symptoms as an unrelated collection of individual problems.

ACE Levels (Angiotensin Converting Enzyme)

ACE Level testing measures an enzyme that becomes elevated in sarcoidosis, a condition causing inflammatory nodules called granulomas to form in various organs, including, in some cases, the nervous system, a presentation called neurosarcoidosis that can cause a wide range of neurological symptoms.

This test provides supporting evidence when neurosarcoidosis is suspected, particularly in patients with unexplained neurological symptoms alongside other signs of sarcoidosis, such as lung involvement or skin changes. However, ACE levels alone cannot confirm the diagnosis, since not every sarcoidosis patient shows elevated levels, and other conditions can occasionally cause mild elevation too.

At Altus Lab, we recommend this test as part of a broader diagnostic picture rather than a standalone answer, working alongside imaging and clinical assessment to help your neurologist build the strongest possible case when neurosarcoidosis is genuinely being considered as an explanation for unexplained symptoms.

Lactate (Plasma & CSF) – Mitochondrial Disease

Lactate testing, measured in both plasma and CSF, helps identify mitochondrial disease, a group of conditions where the cellular structures responsible for energy production don’t function properly, often causing a wide range of neurological symptoms alongside muscle weakness and fatigue that can be difficult to explain otherwise.

Elevated lactate, particularly in CSF, suggests the brain itself is struggling with energy production, a finding that becomes especially significant when combined with other suggestive symptoms like seizures, developmental delay, or unexplained muscle weakness that doesn’t fit more common diagnostic patterns.

At Altus Lab, we recommend paired plasma and CSF lactate testing whenever mitochondrial disease is suspected, since comparing both values gives your neurologist considerably more diagnostic information than either sample alone, helping distinguish genuine mitochondrial dysfunction from other causes of mildly elevated lactate.

Ammonia (Plasma / CSF) – Hepatic Encephalopathy

Ammonia testing measures levels of this compound, normally processed and cleared by a healthy liver, which can accumulate and affect brain function when liver function becomes impaired, a condition called hepatic encephalopathy that causes confusion, altered consciousness, and in severe cases, coma.

This test becomes essential whenever a patient with known or suspected liver disease presents with unexplained confusion or altered mental status, since elevated ammonia provides strong supporting evidence for hepatic encephalopathy, guiding both diagnosis and the urgency of treatment aimed at reducing ammonia levels.

At Altus Lab, we prioritise rapid processing for ammonia testing, since this result often directly influences immediate treatment decisions for patients presenting with altered consciousness, particularly in the context of known liver disease, where every hour matters for preventing further neurological deterioration.

Anti-Ro (SS-A)

Anti-Ro, also called SS-A, is an autoantibody most commonly associated with Sjögren’s Syndrome, a condition primarily affecting moisture-producing glands, but which can also cause neurological complications in some patients, including peripheral neuropathy and, less commonly, central nervous system involvement.

This test becomes relevant when a patient presents with unexplained peripheral nerve symptoms alongside dryness affecting the eyes or mouth, classic Sjögren’s symptoms that patients don’t always volunteer unless specifically asked, since they may not realise these seemingly unrelated symptoms connect to their neurological concerns.

At Altus Lab, we recommend Anti-Ro testing as part of a broader autoimmune workup whenever neurological symptoms accompany signs of dryness or other systemic autoimmune features, since identifying underlying Sjögren’s Syndrome can meaningfully shape both neurological and rheumatological treatment planning going forward.

Anti-La (SS-B)

Anti-La, also called SS-B, frequently appears alongside Anti-Ro in Sjögren’s Syndrome, though it carries somewhat different clinical associations and is generally considered more specific to this condition when present. Testing both antibodies together provides a more complete picture than either result considered in isolation.

Like Anti-Ro, this antibody becomes clinically relevant when neurological symptoms, particularly peripheral neuropathy, accompany other Sjögren’s features, helping your rheumatologist and neurologist coordinate care for a condition that genuinely spans both specialties and benefits significantly from a joint diagnostic and treatment approach.

At Altus Lab, we test Anti-La alongside Anti-Ro as a standard combined approach whenever Sjögren’s-related neurological involvement is suspected, ensuring your treating specialists receive the complete antibody picture needed for confident diagnosis rather than partial, potentially misleading information.

How to Book Genetic, Infectious & Metabolic Testing at Altus Lab

Several tests in this category, particularly TB meningitis testing and viral PCR panels, are genuinely time-sensitive. Call or WhatsApp our team directly, share your prescription, and we will confirm which tests you need and prioritise urgent cases appropriately.

📞 Call: 0172-5017001 / 0172-5017002
💬 WhatsApp: +91-62842-14977
📍 SCO 35, Sector 16-D, Chandigarh
🕐 Open 7 Days: 7:30 AM – 9:30 PM

Blood-based tests are available through home collection across Chandigarh, Mohali, and Panchkula. Genetic counselling support is available for families considering SMA, Huntington’s, or SCA testing.

Frequently Asked Questions

1. How urgent is MTB PCR testing for suspected TB meningitis?
This test is genuinely urgent, since TB meningitis progresses rapidly and delayed treatment risks permanent neurological damage. Altus Lab prioritises rapid processing whenever a case is flagged as time-sensitive.

2. What is the difference between MTB PCR and GeneXpert Ultra?
GeneXpert Ultra is a more sensitive technology that can detect smaller amounts of TB bacteria, useful particularly when standard PCR results remain inconclusive despite strong clinical suspicion.

3. Should I get genetic counselling before Huntington’s disease testing?
Yes, strongly recommended, especially for predictive testing in individuals without symptoms, given the significant emotional and family planning implications this result can carry.

4. Why would my doctor test both plasma and CSF lactate?
Comparing both values gives considerably more diagnostic information about whether elevated lactate reflects a genuine central nervous system issue or a more general, less specific cause.

5. Can SMA be detected before a child shows symptoms?
Yes. Genetic testing can identify SMA-causing mutations before symptoms fully develop, which matters significantly given how much better today’s treatments work when started early.

6. Is ACE level testing enough to diagnose neurosarcoidosis?
No. ACE levels provide supporting evidence but cannot confirm the diagnosis alone, since results vary and other conditions can occasionally cause similar elevation.

7. Why are Anti-Ro and Anti-La tested together?
Both antibodies associate with Sjögren’s Syndrome, and testing them together provides a more complete, more clinically useful picture than either result considered alone.

8. Do genetic tests like SCA and Huntington’s require special preparation?
No special preparation is needed for the blood draw itself. However, we recommend discussing genetic counselling options with our team before booking predictive genetic testing.