 |
| Infection |
|
The course of the illness caused by infection with M hyo depends on the age of the animal at the time of infection, as well and the innate susceptibility/immunity of the individual animal. Management practices will, of course, have an influence on the severity of the disease in the herd. |
|
| M hyo infection can be transmitted either externally, where a previously disease-free herd becomes infected or internally where infection spreads from pig to pig within an already infected herd. As a general rule, the risk of infection from M. hyo within a herd increases with the age of the animals. |
|
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Source |
|
|
|
Recipient |
|
|
|
Risk |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Sow |
|
|
|
Suckling pig | |
|
|
+ |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Gilt | |
|
|
Suckling pig | |
|
|
++ |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Weaner | |
|
|
Weaner | |
|
|
+++ |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Grower | |
|
|
Grower | |
|
|
+++++ |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
|
|
|
|
|
|
||||||
|
|
Finisher | |
|
|
Finisher | |
|
|
+++++ |
|
|
|
|
|
|
|
|
|
||||||
|
||||||||||||
|
| © 2006 Boehringer Ingelheim Ltd UK. All rights reserved. Company Registration Number: 711858 Access to and use of this website is subject to our Terms of use which users are deemed to accept by accessing this website. Any queries concerning the design of the site please send an email to the webmaster. |
|
 |
|
||
|
Transmission |
|
|
|
|
The pathogen can be introduced from outside the herd or can be transmitted within the herd. Studies have demonstrated that infection with M. hyo does not generally occur before nine weeks of age. |
|
|
|
 |
External transmission | |
|
|||
|
|
|
|
|
|||
|
|
Time of infection | |
|
|||
|
|
Studies on the time of infection | |
|
|||