Changes

Outbreaks of the reproductive form of PRRS reportedly last between one and four months, depending on the initial health status on the pigs and the management of the outbreak. However, the post-weaning respiratory phase can become chronic, creating major production problems.

Outbreaks of the reproductive form of PRRS reportedly last between one and four months, depending on the initial health status on the pigs and the management of the outbreak. However, the post-weaning respiratory phase can become chronic, creating major production problems.

Secondary infections commonly occur. Bacteria previously reported to be associated with PRRS include ''Streptococcus suis'', ''Escherichia coli'', '''Salmonella choleraesuis'', ''Haemophilus parasuis'' and ''Mycoplasma hyopneumoniae''. Viral infections such as porcine respiratory coronavirus and swine influenza virus are also possible.

Secondary infections commonly occur. Bacteria previously reported to be associated with PRRS include ''Streptococcus suis'', ''Escherichia coli'', ''Salmonella choleraesuis'', ''Haemophilus parasuis'' and ''Mycoplasma hyopneumoniae''. Viral infections such as porcine respiratory coronavirus and swine influenza virus are also possible.

===Laboratory Tests===

===Laboratory Tests===