Which cell type is mainly involved during the early stage of inflammation?

RRB Nsg. Superintendent-2026 (Shift -3rd)

Pathology & Genetics

Easy

Appeared in: RRB Nsg. Superintendent-2026 (Shift -3rd)

Explanation

Neutrophils are the first leukocytes to migrate to the site of injury during acute inflammation, dominating the cellular infiltrate in the first 6-24 hours.
Their primary function is phagocytosis, where they engulf and destroy pathogens like bacteria and foreign material, acting as the body's first line of cellular defense.
An increase in the number of neutrophils in the blood, known as neutrophilia, is a classic sign of acute bacterial infection.
They are also called polymorphonuclear leukocytes (PMNs) due to their multi-lobed nucleus.

Option B: Lymphocytes are the predominant cells in chronic inflammation, not the early acute stage. They are responsible for the adaptive immune response (T-cells and B-cells), which develops over a longer period.
Option C: Erythrocytes are red blood cells, and their primary function is to transport oxygen from the lungs to the tissues. They do not have a direct phagocytic or immune role in the inflammatory process.
Option D: While basophils (and mast cells) are involved in inflammation by releasing mediators like histamine, they are not the main or most numerous cells in the initial phase of a typical acute inflammatory response. Their primary role is in hypersensitivity and allergic reactions.

Visual 1: Diagram: The process of acute inflammation, showing the sequence of cellular events from margination and diapedesis of neutrophils to their phagocytic action at the site of injury.
Visual 2: Micrograph: A tissue sample showing acute inflammation with a high concentration of neutrophils (polymorphonuclear leukocytes) surrounding a blood vessel.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Cellular response in acute inflammation as background academic context rather than a clinical decision trigger.
Interpreting a Complete Blood Count (CBC) with differential is a key nursing skill. An elevated neutrophil count (neutrophilia) is a classic laboratory finding that indicates an acute bacterial infection or inflammatory process.
Nurses monitor for the five cardinal signs of inflammation (redness, heat, swelling, pain, loss of function) and report significant findings, which may correlate with lab results showing neutrophilia.
What if? If the inflammation persists for several weeks (becoming chronic), a CBC would likely show a shift from high neutrophils to elevated lymphocytes and monocytes/macrophages.

How to Approach the Question

First, identify the key terms in the question: 'early stage' and 'inflammation'. This combination points specifically to an acute inflammatory process.
Second, recall the different types of white blood cells and their primary functions in the immune system.
Third, differentiate the roles of cells in acute versus chronic inflammation. Remember the mnemonic 'Neutrophils are for Now' (acute) and 'Lymphocytes are for Later' (chronic).
Finally, evaluate the options based on this differentiation. Lymphocytes are for chronic inflammation, erythrocytes for oxygen transport, and basophils for specific allergic reactions. This leaves neutrophils as the primary cell for the early, acute phase.

Concept Tested & Keywords

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