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D F Twomey

Publications and source records attributed to D F Twomey.

12 recordsLinked to original sources
PubMed2006

An investigation into the role of Chlamydophila spp. in bovine upper respiratory tract disease.

An outbreak of upper respiratory tract disease was investigated in a group of 17 housed home-bred calves on a mixed dairy, beef and sheep farm in Devon. Conjunctival swabs were collected and tested for Chlamydophila spp. DNA using a PCR test that detects Chlamydophila abortus and Chlamydophila psittaci. Six of the calves tested gave a positive result. Further epidemiological observations and laboratory testing indicated that the adult dairy cows, from which the affected calves originated, were the most likely source of infection.

Animals↗
PubMed2003

Anaemia and mortality in calves infested with the long-nosed sucking louse (Linognathus vituli).

Young calves which died on three dairy farms in England and Wales had generalised pallor and heavy infestations of the long-nosed sucking louse, Linognothus vituli. Surviving calves had packed-cell volumes, haemoglobin concentrations and red blood cell counts below the reference ranges, consistent with anaemia, and they were also heavily infested with lice. No other causes of anaemia were identified. It is proposed that heavy infestations with L. vituli should be considered when investigating the cause of anaemia in calves.

Anemia↗