Cerebrospinal fluid composition of cattle with endotoxin-induced mastitis treated with isotonic (0.9%) or hypertonic (7.5%) sodium chloride.
This study examined the safety of intravenous hypertonic saline in cattle with experimental gram-negative endotoxemia. Cerebrospinal fluid (CSF) composition was examined in five control cows and eight treated cows 24 hours after the intramammary infusion of 1 mg of endotoxin. Four of the endotoxin challenged cows were treated intravenously with isotonic (0.9%) sodium chloride and four cows were treated intravenously with hypertonic (7.5%) sodium chloride. Decreased CSF osmolality, and sodium and alpha globulin concentrations and increased CSF concentrations of beta globulin were observed in both endotoxin-challenged saline-treated groups. No CSF compositional differences were observed between endotoxin-challenged cows receiving isotonic or hypertonic saline. Although no cytologic or biochemical evidence of salt poisoning was observed in cows receiving hypertonic saline, significant changes were observed in the CSF composition of both endotoxin-infused saline-treated groups.
Tyler
J W
JW
Department of Large Animal Surgery and Medicine, College of Veterinary Medicine, Auburn University, Alabama 36849.
Welles
E G
EG
Sorjonen
D C
DC
Spano
J S
JS
Gaslin
J T
JT
Spears
H
H
D000818:Animals; D002417:Cattle; D002556:Cerebrospinal Fluid Proteins / Q000187:drug effects; D004731:Endotoxins; D004926:Escherichia coli; D005260:Female; D005440:Fluid Therapy / Q000009:adverse effects / Q000662:veterinary*; D005916:Globulins / Q000134:cerebrospinal fluid; D007552:Isotonic Solutions / Q000009:adverse effects / Q000627:therapeutic use; D008414:Mastitis, Bovine / Q000134:cerebrospinal fluid / Q000628:therapy*; D009994:Osmolar Concentration; D012462:Saline Solution, Hypertonic / Q000506:poisoning / Q000627:therapeutic use*; D012965:Sodium Chloride / Q000009:adverse effects / Q000097:blood / Q000134:cerebrospinal fluid / Q000627:therapeutic use*
D002556:Cerebrospinal Fluid Proteins; D004731:Endotoxins; D005916:Globulins; D007552:Isotonic Solutions; D012462:Saline Solution, Hypertonic; D012965:Sodium Chloride