CD4 and infection: SinceCryptosporidium infection is related to the risk of chronicdiarrhea, the clinicians must pay attention to the number of CD4+T-lymphocyte cells; the lower the CD4+ cells counts, the greater the riskof chronic diarrhea with prolonged duration.13 Previous studies suggested that additional laboratory examinations must beconducted when diagnosing a person as HIV-seropositive.