NON-GENETIC FACTORS THAT PREPARATED PENEUMONIA INCIDENCE IN HOLSTEIN CATTLE AND THEIR EFFECT ON MILK-PRODUCTION IN THE MIDDLE OF IRAQ

Statistically analyzed 5226 records for factors preparated pneumonia incidence which were parity , year and season of incidence with 2046 records refer to total milk production (TMP) and location period (LP) were collected during 1998 to 2001 on Holstein cows at Al-Nasr Dairy Cattle Station near to Al-Soueria . The over all mean for the % of pneumonia among cows was 10.73% and affected high significantly by parity, year and season. The over all mean SE for TMP was 4198.75 24.45 kg which significantly (p <0.01) affected by parity , incidence and lactation ion period , while it was (p<0.05) for year and season of incidence. The TMP for healthy cows was 4348.11 84.99 kg while the production reduced to 4163.39 84 kg in those infected cows. The over all mean SE for LP was 326.74 1.72 days and this was affected highly significantly by parity , year and case of disease but did not affected by season of incidence so as a shorter LP for infected cows was 313.77 6.56 day and increased to 324.67 5.98 days in healthy cows . So, we need to do more studies for this disease and do a genetic evaluation for higher resistance cows.