Quarterly Pathology VI South America 1T 2011
Austral summer has conditioned the pathology in poultry and swine.
In birds, we can underline the presence of mycoplasmic and viral diseases favoured by the immune deficiency due to the caloric stress (Gumboro, infectious bronchitis) beside to bacterial infectious( sinusitis-tracheitis-sinovitis and colibacillosis) which represent the main infectious pathologies.
Apart from that, in birds, there have been diagnosed coccidiosis and exoparasites as well as metabolic pathologies linked to the climatic season such as the syndrome of fatty liver in birds that initiated its lay in January.
This hepatic pathology has coexisted in laying hens, in more advanced stages of its laying cycle, with infectious toxic hepatoenteritis by presenting involution of crest, loss of weight, greenish excrements, fever, loss of weight and mortality in drip.
Regarding swine, the most common pathologies have been Salmonella and Lawsonia intracellularis, accompanied by meningitis by Sterptococcus suis. High temperatures have favoured the reappearance of Actinobacillus suis (swine nephropathy dermatitis) and its immunosuppressive repercussion. In newly born piglets there have been observed some petechiae at renal level and an increase of infectious diarrhea.
We also want to mention that the deficiencies in vitamin E and selenium have caused the appearance of muscular and hepatic injuries (metabolic hepatosis).
Finally we would like to comment that there has been producing syndrome of bad absorption due to the increase of raw material prices, despite of being located in cereal producer areas and changes in formulation without the use of specific digestive enzymes.