Table 2 Honey bee epidemiological data related to VIL and Nosema infection from different countries. (N): Number of samples or colony, (VIL): Varroa infestation level, (VP): Varroa prevalence, (SC): Nosema spore count in million spores per bee, (NP): Nosema prevalence, (GB): Predominant genetic background, (EHB): European honey bees, (AHB): Africanized honey bees, (BM): Beekeeping mode and (HS): Health status of colony.

From: Prevalence and distribution of Varroa destructor and Nosema spp. in symptomatic honey bee colonies across the USA from 2015 to 2022

Country

Authority

Year

N

VIL %

VP %

References

GB

BM

HS

Varroa mite

USA

USDA-ARS/BRL

2015–2022

4039

8.21

85.14

Current Study

EHB

Mix

Clinically ill

USA

USDA-APHIS/NHBS

2015–2020

4860

3.09

91.52

Current Study

EHB

Mix

Healthy

USA

USDA-APHIS/NHBS

2009–2014

2901

6

97

52

EHB

Mix

Healthy

Argentina

SENASA

2005–2007

1896

na

74

53

EHB

Stationary

Healthy

Brazil

Academic Report

1979–2020

361

4.5

na

39

AHB

Stationary

Healthy

Brazil

Academic Report

2009–2010

438

5.4

95.7

40

AHB

Stationary

Healthy

Brazil

Academic Report

1986

18

7.5

na

43

EHB

Stationary

Healthy

Brazil

Academic Report

1986

18

5.8

na

43

AHB

Stationary

Healthy

Colombia

Academic Report

2013–2014

483

4.5

92

34

AHB

Stationary

Healthy

Mexico

Academic Report

2013

80

7.4

na

37

AHB/EHB

Stationary

Healthy

Mexico

Academic Report

2016

369

5.2

87.8

38

AHB/EHB

Stationary

Healthy

Mexico

Academic Report

2016–2017

369

3.5

83.5

54

AHB/EHB

Stationary

Healthy

Uruguay

Academic Report

2011

103

4.4

75.7

55

AHB/EHB

Stationary

Healthy

Country

Authority

Year

N

SC

NP %

Reference

GB

BM

HS

Nosema spp.

USA

USDA-ARS/BRL

2015–2022

2994

6.8

99.73

Current Study

EHB

Mix

Clinically ill

USA

USDA-APHIS/NHBS

2015–2020

4124

0.21

46.56

Current Study

EHB

Mix

Healthy

Mexico

Academic

2017

369

na

48.5

54

AHB/EHB

Stationary

Healthy

Argentina

SENASA

2012

333

na

49

53

EHB

Mix

Healthy

Brazil

Academic

2009–2012

637

na

79.9

56

AHB

Stationary

Healthy

Chie

Academic

2012

240

0.1

49

57

EHB

Mix

Healthy