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L3 and adult Ostertagia (Teladorsagia) circumcinta exhibit cyanide sensitive oxygen uptake
journal contribution
posted on 2023-05-16, 17:21 authored by Simcock, DC, Brown, SC, Neale, JD, Przemeck, SMC, Simpson, HVOxygen consumption by L 3 and adult Ostertagia (Teladorsagia) circumcincta was examined in vitro to determine whether oxygen can be utilised in metabolism. The oxygen concentration in the abomasal fluid of sheep infected with O. circumcincta was also measured. Rates of consumption (in nmol O 2/h/1000 worms) were 13 ± 1 in sheathed L 3, 34 ± 6 in exsheathed L 3, and 1944 ± 495 in adult worms. Constant rates of consumption were maintained until media oxygen concentration dropped to between 10 and 20 μM. Consumption was inhibited 95% by cyanide in L 3 and 74% in adults. Oxygen concentration in abomasal fluid varied between 10 and 30 μM in both infected and uninfected animals. During infection, oxygen concentration decreased slightly with increased abomasal pH, though the correlation between the two was poor (r = -0.30). In conclusion, O. circumcincta can consume oxygen and oxygen concentration at the infection site is sufficient to support at least some aerobic metabolism. © 2005 Elsevier Inc. All rights reserved.
History
Publication title
Experimental ParasitologyVolume
112Pagination
1-7ISSN
0014-4894Department/School
School of Health SciencesPublisher
ElsevierPlace of publication
San DiegoRepository Status
- Restricted