Table 1. Distribution of N. ceranae in three different regions in Bulgaria.

Region	No. of collected samples	No. of Nosema positive samples	% of Nosema positive samples	N. ceranae	N. apis	Co-infection
Smolyan (SB)	36	5	13.9	5	–	–
Sofia (WB)	28	18	64.3	18	–	–
Russe (NB)	44	34	77.2	34	–	–
Total	108	57	52.8	57	–	–

Notes.

Abbreviations

SB

South Bulgaria

WB

West Bulgaria

NB

North Bulgaria