Complex sentence: However, septic synovial fluid can have white blood cell counts as low as a few thousand in the early stages and, therefore, differentiation of septic arthritis from aseptic inflammatory arthritis is not always possible based on cell counts alone.
Split into simpler sentences: However, septic synovial fluid can have white blood cell counts as low as a few thousand in the early stages. Therefore, differentiation of septic arthritis from other causes is not always possible based on cell counts alone.