BLOOD CHLORIDES IN CONDITIONS ASSOCIATED WITH PNEUMONIA.

Area of Science:

• Physiology
• Biochemistry

Background:

• Serum chloride levels are critical physiological indicators.
• Previous studies explored various methods to alter serum chlorides without consistent findings.

Purpose of the Study:

• To investigate the effects of different physiological conditions and interventions on serum chloride concentrations in dogs.
• To identify factors that can reliably lower serum chloride levels.

Main Methods:

• Dogs were subjected to various procedures including food withholding, induction of anoxemia, tissue destruction, anaphylactic shock, leucocytosis, fever, and water ingestion.
• Serum chloride levels were monitored throughout the experiments.
• Experimental pneumococcus infection was introduced in a subset of animals.

Main Results:

• Withholding food, anoxemia, tissue destruction, anaphylactic shock, leucocytosis, and fever did not significantly alter serum chloride levels.
• Ingestion of large amounts of water led to a notable decrease in serum chloride concentration, independent of body temperature changes.
• The observed decrease in serum chlorides following water ingestion was correlated with an increase in serum water content, rather than increased excretion.
• Experimental pneumococcus infection also resulted in reduced serum chloride concentration.

Conclusions:

• Serum chloride levels in dogs are not significantly affected by factors like anoxemia, fever, or anaphylaxis.
• Significant hydration, specifically the ingestion of large water volumes, is a potent factor in lowering serum chloride levels.
• The mechanism for chloride reduction during hydration involves an increase in serum water, not enhanced renal excretion.
• Bacterial infections, such as pneumococcus, can also lead to a reduction in serum chloride concentration.