Avian mycoplasmosis (M. gallisepticum),
Information received on 07/03/2019 from Dr Roland Xolani Dlamini, Director of Veterinary and Livestock Services, Veterinary and Livestock Services, Ministry of Agriculture , Mbabane, Swaziland
Report type Immediate notification
Date of start of the event 13/12/2018
Date of confirmation of the event 14/02/2019
Report date 07/03/2019
Date submitted to OIE 07/03/2019
Date event resolved 29/07/2019
Reason for notification First occurrence of a listed disease
Manifestation of disease Clinical disease
Causal agent Mycoplasma gallisepticum
Nature of diagnosis Laboratory (basic)
This event pertains to a defined zone within the country
Related reports Immediate notification (07/03/2019)
Follow-up report No. 1 (29/07/2019)
New outbreaks (1)
Outbreak 1 Excelsior, Manzini
Date of start of the outbreak 13/12/2018
Outbreak status Resolved (29/07/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 51315 1026 1026 0 50289
Affected population Broiler breeders, 45 weeks old. Population is 93% breeder hens and a couple of male birds. The farm has two broiler breeder sites with four houses each. Each site has a shower in, shower out biosecurity control. The birds were vaccinated at 10 weeks of age.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 51315 1026 1026 0 50289
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 2.00% 2.00% 100.00% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments The disease was suspected due to the poor performance of chicks that were originating from the breeder flock in site 1. Testing of the breeder flock yielded positive results. The breeders were then put on medication for mycoplasma. Testing of all houses in site 1, as well as in site 2, is ongoing. Affected chickens in site 1 are near the end of the production cycle, and controlled culling will be done.
Control measures
Measures applied
  • Quarantine
  • Vaccination permitted (if a vaccine exists)
  • Treatment of affected animals (Medication with tiamulin hydrogen fumarate)
Measures to be applied
  • Surveillance within containment and/or protection zone
  • Selective killing and disposal
Diagnostic test results
Laboratory name and type Species Test Test date Result
Deltamune Laboratory (Foreign laboratory) Birds polymerase chain reaction (PCR) 14/02/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations