lesions associated with an infectious process such as renal abscesses , staphylococcal nephritis , pyelonephritis and pyelitis were the principal finding in rabbits up to 5 months of age , while renal fibrosis , with or without dystrophic calcification , was the most common lesion observed in rabbits aged over 10 months .
C0027697
nephritis
C0034183
pyelitis