Prevalence of Malaria and TB Coinfection at a National Tuberculosis Treatment Centre in Uganda

Table 1

Grading of bacillary load by laboratory result.

Bacillary Load Grade	Smear	Xpert MTB/RIF®
	(ZN^# or Auramine stain)	(GeneXpert)^β
Very Low	Scanty (1-9AFBs^¥/100 fields)	Very Low
Low	1+ (1-9AFBs/10 fields)	Low
Medium	2+ (1-10/field)	Medium
Very High	3+ (>10/field)	High

#: ZN: Ziehl-Neelsen.
β: Bacillary load by Xpert MTB/RIF® is determined by cycle threshold values.
¥: AFBs: acid fast bacilli.