Noi Naadal and Noi Mudhal Naadal (Pathology)

About the Department

“நோய் நாடி நோய் முதல் நாடி அது தணிக்கும்
வாய் நாடி வாய்ப்பச் செயல்.”

“Noi Naadi, Noi Mudhal Naadi, Adhu Thanikkum Vaai Naadi, Vaaippach Cheyal”

— Thiruvalluvar, Thirukkural 948

This timeless verse from Thiruvalluvar — “Diagnose the disease, trace its root cause, find the right remedy, and apply it correctly” — is the very foundation of the Department of Noi Naadal and Noi Mudhal Naadal (Pathology). The department’s name itself is drawn from this Kural, and its work is to teach future Siddha physicians how to live up to it.

At Annai Medical College of Siddha and Research Centre, this department equips BSMS students with both the classical Siddha diagnostic system and modern pathological science. Students master the eight-fold examination (Envagai Thervu), urine examination (Neerkuri and Neikuri), and Naadi Parikshai — the diagnostic tools developed by the Siddhars centuries ago — alongside modern general pathology, systemic pathology, haematology, clinical pathology, and microbiology. The result is a physician who can diagnose disease accurately, trace its true cause, and prescribe treatment that genuinely works.

Vision

To produce Siddha physicians whose diagnostic skill matches the wisdom of Thiruvalluvar’s Kural — physicians who can identify a disease, uncover its root cause, and apply the right remedy with both classical insight and modern scientific precision.

Mission

• To impart in-depth knowledge of Siddha diagnostic methods — Envagai Thervu, Neerkuri, Neikuri, and Naadi Parikshai.
• To provide thorough training in modern pathology, haematology, clinical pathology, and microbiology.
• To develop sharp clinical reasoning by correlating Siddha disease theory with modern pathophysiology.
• To equip students with hands-on laboratory skills required for accurate diagnosis.
• To promote research that scientifically validates Siddha diagnostic concepts.

Objectives

By the end of the course, students will be able to:

• Perform Envagai Thervu (eight-fold examination) competently in clinical settings.
• Conduct Neerkuri and Neikuri examination and interpret findings.
• Demonstrate basic Naadi Parikshai and identify Vali, Azhal, and Iyya naadi.
• Explain the pathogenesis of common diseases through both Siddha (Mukkutra derangement) and modern frameworks.
• Perform routine clinical pathology and haematology investigations.
• Identify common pathogens and understand principles of infection control.
• Correlate clinical signs, lab findings, and Siddha diagnostic data to reach an accurate diagnosis.

Topics Covered in the Curriculum

The syllabus framed by NCISM and Tamil Nadu Dr. M.G.R. Medical University includes:

Siddha Pathology / Noi Naadal

• Definition and concept of Noi (disease) in Siddha
• Causes (Hethu) and progression (Noi Mudhal) of disease
• Mukkutra Verupadu — derangement of Vali, Azhal, Iyyam in disease
• Pini Vagai — classification of diseases (4448 noigal as per classical texts)
• Envagai Thervu (eight-fold examination):
  1. Naa (tongue)
  2. Niram (colour/complexion)
  3. Mozhi (voice)
  4. Vizhi (eyes)
  5. Sparisam (touch)
  6. Malam (stool)
  7. Moothiram (urine)
  8. Naadi (pulse)
• Neerkuri — physical examination of urine (colour, smell, density, froth, sediment)
• Neikuri — interpretation of oil-drop pattern on urine for Mukkutra status
• Naadi Parikshai — pulse diagnosis (Vali, Azhal, Iyya naadi and their combinations)
• Manikkadai Nool — wrist measurement diagnostic technique
• Prognosis (Arishta Lakshanam) — signs predicting outcome of disease

Modern Pathology

• General pathology — cell injury, inflammation, healing, immunity, hypersensitivity
• Haemodynamic disorders — oedema, thrombosis, embolism, infarction, shock
• Neoplasia — benign and malignant tumours
• Genetic and developmental disorders
• Systemic pathology — cardiovascular, respiratory, gastrointestinal, hepatobiliary, renal, endocrine, nervous, reproductive, musculoskeletal
• Haematology — anaemia, leukaemia, bleeding disorders, blood transfusion
• Clinical pathology — urine, stool, semen, CSF, body fluid analysis
• Histopathology and cytopathology basics

Nunnuyiriyal / Microbiology

• General bacteriology — morphology, staining, culture, sensitivity
• Common bacterial, viral, fungal, and parasitic infections
• Immunology basics
• Sterilisation and disinfection
• Hospital-acquired infection and infection control
• Biomedical waste management

Teaching–Learning Methodology

• Classroom lectures with multimedia, charts, and case-based teaching
• Clinical demonstration of Envagai Thervu, Neerkuri, and Neikuri at OPD
• Naadi Parikshai workshops on patients and volunteers
• Hands-on practicals in pathology and microbiology laboratories
• Slide-based learning for haematology and histopathology
• Case discussions integrating Siddha and modern diagnosis
• Tutorials, seminars, OSPE, and viva voce
• Periodic internal assessments and integrated examinations
• Bedside teaching at the attached Siddha hospital

Department Infrastructure & Facilities

• Pathology Laboratory equipped for haematology, clinical pathology, urine analysis, stool examination, and basic histopathology — meeting NCISM norms
• Microbiology Laboratory with microscopes, incubators, autoclave, hot-air oven, staining facilities, and culture media preparation
• Neerkuri–Neikuri Demonstration Area for traditional Siddha urine examination training
• Naadi Parikshai Practice Section dedicated to pulse-diagnosis training
• Museum displaying pathology specimens, charts, slides, and microbial cultures
• Smart Lecture Hall with multimedia projection and digital pathology resources
• Departmental Library with reference textbooks (Robbins, Harsh Mohan, Ananthanarayan, Park) and classical Siddha diagnostic texts
• Internet-enabled e-learning resources, e-journals, and digital slide repositories
• Linkage with the OPD and IPD of the attached hospital for live case exposure

Learning Outcomes

Upon completion of the course, students will:

• Be able to diagnose common diseases using both Siddha and modern methods.
• Be skilled in Envagai Thervu, Neerkuri, Neikuri, and basic Naadi Parikshai.
• Be competent in routine clinical pathology, haematology, and microbiology investigations.
• Understand the pathogenesis of disease at cellular, tissue, organ, and systemic levels.
• Apply Thiruvalluvar’s diagnostic principle — disease, cause, remedy, and proper application — in real clinical practice.

Significance and Scope

Diagnosis is the heart of medicine. Without a correct diagnosis, even the finest medicine fails. This department is therefore the bridge between pre-clinical knowledge and clinical practice. A student who masters Noi Naadal becomes a confident Siddha physician — able to read the body the way the Siddhars did, while also harnessing the precision of modern laboratory science. Career and research opportunities include postgraduate Siddha specialisations, AYUSH research positions, clinical laboratory practice, hospital pathology services, and integrative diagnostics.