Classification of Fever:

Fever can be classified as follows:

Aetiological:

• Protein fever: Fever occurs due to administration of foreign protein, damaged tissue following necrosis, hemorrhage and fracture
• Salt fever: Fever caused due to administration of hypertonic saline
• Neurogenic Fever: Damage of brain cells following injury, trauma, hemorrhage, tumor causes fever
• Transitory Fever: Fever caused due to over dehydration in animals. It is also known as thirst fever
• Drug Fever: Fever caused due to administration of some drugs like adrenaline, thyroxin, nicotine, caffeine
• Idiopathic Fever: Specific fever against specific diseases, ex; Anthrax, Ephemeral fever, etc.

Clinical:

• Acute fever: There is sudden sharp elevation of body temperature to level of 104°F or above. This type of fever is recorded in acute bacterial or viral disease.
• Sub-acute fever: Temperature doesnot goes too high and remains within range of 103°F. This type of fever is recorded in mild inflammatory reactions; metritis, nephritis, cystitis, etc.
• Chronic fever: In this type of fever, temperature doesnot exceeds above 1-2°F beyond normal range. Course is usually prolonged. It is seen in pulmonary tuberculosis, chronic pyometritis, etc.