Bacterial and viral detection on airway samples
Bacteria were observed in the TW of 11 horses. Streptococcus equisubsp zooepidemicus (20 000 – 12 000 000 CFU/mL) was identified
in 6 horses, 4 horses with MA and 2 horses with SA. Actinobacillus
haemolyticus (10 000 – 2 000 000 CFU/mL) was identified in 5 samples,
3 horses with MA and 2 horses with SA. Mycoplasma spp was
detected in the TW of 34.3% (57/155) of all horses, with 31.6% (12/35)
of CTL horses, 38.8% (33/85) of MA horses and 28.6% (12/35) of SA
horses respectively.
Herpesvirus-4 was detected in TW of 2 horses (1.3%), both were in MA
group. Herpersvirus-2 and EHV-5 were detected in TW of 30.3% (47/155)
and 38.1% (59/155) of all horses respectively. Herpesvirus-2 was
identified in 37.2% (13/35) of CTL horses, 28.2% (24/85) of MA horses
and 34.3% (10/35) of SA horses. On the other hand, EHV-5 was identified
in 40% (14/35) of CTL horses, 42.4% (36/85) of MA horses and 25.7%
(9/35) of SA horses.
Equine rhinitis virus B was detected in TW of 38.6% (59/153) of horses,
with 42.4% (14/33) of CTL horses 38.8% (33/85) of MA horses and 34.3%
(12/35) of SA horses. Herpersvirus-1, ERAV, EAdV-1 and −2 and EIV were
not detected in any TW sample.
In BALF, EHV-2 was identified in 8.4% (13/154) of horses, with 13.1%
(11/84) in the MA group and 5.7% (2/35) in the SA group. Equine
herpesvirus-5 was identified in 7.1% (11/154) of all samples, with
2.9% (1/35) in the CTL group, 9.5% (8/84) in the MA group and 5.7%
(2/35) in the SA group. Equine rhinitis virus B was not detected in any
BALF sample.