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Table 1 Positive animals out of the total number of camels on the farm (n = 24) to each diagnostic test in the different testing events throughout the study

From: Tuberculosis caused by Mycobacterium caprae in a camel (Camelus dromedarius)

Test December 2016e February 2017 October 2017 February 2018 April 2018 October 2018 March 2019
SITa 1/24 (Animal 1) 1/1 (Animal 1) ND ND 2/23(Animals 2 and 4) ND 0/20
CITb NDf 1/1 (Animal 1) ND ND 0/23 ND 0/20
Serology P22c 1/1 (Animal 1) 1/24* (Animal 1) 1/24* (Animal 1) 0/23* 0/23* ND 0/20*
DPPd 0/1 0/24 0/24 0/23 0/23 ND 0/20
Euthanasia/natural death 1 animal (euthanasia, Animal 1) 2 animals (euthanasia, Animals 4 and 5) 1 animal natural death (Animal 6)
Pathology ND ND ND 1/1 (Animal 1 TB-compatible lesions) 0/2 0/1 ND
Bacteriology ND ND ND 1/1 (Animal 1-M. caprae) 0/2 0/1 ND
  1. * Animals 2 and 3 attained inconclusive results
  2. aSIT: Single intradermal test. Positive if a bovine reaction of 2 or more mm or the presence of clinical signs such as oedema, exudation, necrosis, pain or inflammation at the injection site were observed
  3. bCIT: comparative intradermal test. Positive if a bovine reaction of 2 or more mm was observed that was greater than the avian reaction, or if the presence of clinical signs at the injection site of the bovine PPD were observed
  4. c P22 ELISA: positive if the E% is greater than 150% and inconclusive if the E% is between 100 and 150%
  5. dDPP: Dual Path Platform
  6. eSerology only performed on the SIT positive animal (Animal 1)
  7. f ND: not determined