Table 2 Prevalence of microbiological hazards in milk and cheese

Hazards	Sample	No. of positive/No. of total (%)	Reference
L. monocytogenes	Bulk tank milk	56/861 (6.5)	Van Kessel et al. (2004)
L. monocytogenes	Bulk tank milk	13/240 (5.4)	Jamali et al. (2013)
L. monocytogenes	Raw milk	1/90 (0.1)	Rahimi et al. (2010b)
L. monocytogenes	Raw milk	7/343 (2.0)	Seyoum et al. (2015)
L. monocytogenes	Raw milk	12/75 (16)	Gohar et al. (2017)
L. monocytogenes	Pasteurized milk	13/65 (20)	Seyoum et al. (2015)
L. monocytogenes	Cheese	2/85 (2.4)	Aygun and Pehlivanlar (2006)
L. monocytogenes	Cheese	10/90 (1.1)	Rahimi et al. (2010b)
L. monocytogenes	Cheese	4/15 (26.7)	Seyoum et al. (2015)
L. monocytogenes	Cheese	3/25 (12)	Gohar et al. (2017)
E. coli	Raw milk	28/224 (12.5)	Addo et al. (2011)
E. coli	Raw milk	17/165 (10.3)	Costa Sobrinho et al. (2012)
E. coli	Raw milk	31/56 (55.2)	Kiros et al. (2016)
E. coli	Cheese	17/40 (42.5)	Kiros et al. (2016)
E. coli	Cheese	55/72 (76.4)	Ombarak et al. (2016)
E. coli O157:H7	Bulk tank milk	2/268 (0.8)	Murinda et al. (2002a)
E. coli O157:H7	Raw milk	4/240 (0.5)	Ahmed and Shimamoto (2014)
E. coli O157:H7	Cheese	9/240 (3.8)	Ahmed and Shimamoto (2014)
Salmonella	Bulk tank milk	8/131 (6.1)	Jayarao and Henning (2001)
Salmonella	Bulk tank milk	6/268 (2.2)	Murinda et al. (2002b)
Salmonella	Bulk tank milk	22/861 (2.6)	Van Kessel et al. (2004)
Salmonella	Raw milk	4/240 (0.5)	Ahmed and Shimamoto (2014)
Salmonella	Cheese	3/70 (4.3)	Almeida et al. (2007)
Salmonella	Cheese	4/240 (0.5)	Ahmed and Shimamoto (2014)
S. aureus	Raw milk	41/56 (73.5)	Kiros et al. (2016)
S. aureus	Raw milk	12/26 (46.2)	Rola et al. (2016)
S. aureus	Cheese	38/55 (69.1)	Rosengren et al. (2010)
S. aureus	Cheese	6/96 (6.3)	Rosengren et al. (2010)
S. aureus	Cheese	28/40 (70)	Kiros et al. (2016)
S. aureus	Cheese	39/52 (75)	Rola et al. (2016)