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Case Study 5

Farm History:
A full cycle pig farm with 2,500 breeding sows in Chonburi.

Problem:
There was the incidence of mummification during February. Mummies were varied in sizes and conditions (fresh or almost rotten).

  • Possible causes:
    - Parvovirus
    - E. coli
    - Streptococcosis
    - Too large litter size
    - Lameness

Farm assessment:

  • By inspection
    - looking at lameness incidence, there was no incidence in gestating sows and sows at farrowing.
  • By using the software program “Mor Moo”
    reporting page , overall efficiency
    Objective
    - to see if the incidence of mummification found makes the figure existing in the report higher (enough to induce significant change).
    Findings
    - mummification increased from 1 to 2.5 %
    reporting page, comparison among lactation numbers
    Objective
    - to see if the incidence of mummification found occurs in a particular group of sows and which group that affected most.
    Findings
    - mummification took place in sows of all lactation numbers and not specific to a given group.
    - Parvovirus was not the primary cause of mummification.
    Reporting page, breeding sows at farrowing
    Objective
    - To see the number of mummies found in each sow (many mummies should determine infection as a primary cause whereas less mummies should be related to management).
    - To see relationship among litter sizes and incidence of mummification by selecting the sows that gave birth of up to 12 piglets.
    Findings
    - Many mummies were found in some sows.
    - Mummification was not related litter size.
    - Too large litter size was not a cause.

Possible causes:
- Streptococcosis (this farm had a history of abortion due to Streptococcosis at the end of last year).
- E.coli (the farm also had a history of E.coli contamination in drinking water).
- Lab test of water found no contamination of E.coli.
- Tentative conclusion could be drawn primarily from the previous abortion due to Streptococcosis. Some sows got infected and aborted whereas the others got only aborted. The latter gave birth as mummies.

Lab confirmation:
- Aspirating liquid from the thoracic cavity and testing for the pathogen by PCR(however this farm did not keep the fresh mummies for autopsy so there was no test).

Problem fixing:
- Using amoxycillin mixed with gestation feed at the dosage of 200-250 ppm. for 10 – 14 days, consecutively.
- The problem should have been disappeared within 4 months after the tackle of previous abortion.

Problem follow-up:
- Mummification incidence decreased in March 2007.

Conclusion:
Problem due to mummification in this farm resulted from Streptococcosis as the primary cause of abortion during the end of last year. Usually, abortion and mummification are present in cases of Streptococcosis unless stressors in sows are not controlled. Hot climate, wind, and lameness are key stressors that affect the well-being of sows. The best way to control the disease is to avoid those stressors and feed the sows an antibiotic (mixed with feed).



 

 
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