The effect of diet on Apis mellifera larval susceptibility to Paenibacillus larvae

2020 ◽  
Vol 59 (5) ◽  
pp. 817-824
Author(s):  
María de la Paz Moliné ◽  
Natalia J. Fernández ◽  
Natalia Damiani ◽  
M. Sandra Churio ◽  
Liesel B. Gende
Keyword(s):  
Apis Mellifera ◽  
Paenibacillus Larvae ◽  
Larval Susceptibility

scholarly journals Impact of Nosema Disease and American Foulbrood on Gut Bacterial Communities of Honeybees Apis mellifera

Insects ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 525
Author(s):  
Poonnawat Panjad ◽  
Rujipas Yongsawas ◽  
Chainarong Sinpoo ◽  
Chonthicha Pakwan ◽  
Phakamas Subta ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Bacterial Communities ◽  
454 Pyrosequencing ◽  
Gut Bacteria ◽  
Nosema Ceranae ◽  
Paenibacillus Larvae ◽  
American Foulbrood ◽  
Nosema Disease ◽  
The Impact ◽  
Pathogenic Infection

Honeybees, Apis mellifera, are important pollinators of many economically important crops. However, one of the reasons for their decline is pathogenic infection. Nosema disease and American foulbrood (AFB) disease are the most common bee pathogens that propagate in the gut of honeybees. This study investigated the impact of gut-propagating pathogens, including Nosema ceranae and Paenibacillus larvae, on bacterial communities in the gut of A. mellifera using 454-pyrosequencing. Pyrosequencing results showed that N. ceranae was implicated in the elimination of Serratia and the dramatic increase in Snodgrassella and Bartonella in adult bees’ guts, while bacterial communities of P. larvae-infected larvae were not affected by the infection. The results indicated that only N. ceranae had an impact on some core bacteria in the gut of A. mellifera through increasing core gut bacteria, therefore leading to the induction of dysbiosis in the bees’ gut.

scholarly journals Bioactivity of gallic acid–conjugated silica nanoparticles against Paenibacillus larvae and their host, Apis mellifera honeybee

Apidologie ◽  
2019 ◽  
Vol 50 (5) ◽  
pp. 616-631 ◽  
Author(s):  
Enzo Domínguez ◽  
María P. Moliné ◽  
María S. Churio ◽  
Valeria B. Arce ◽  
Daniel O. Mártire ◽  
...  
Keyword(s):  
Apis Mellifera ◽  
Silica Nanoparticles ◽  
Gallic Acid ◽  
Paenibacillus Larvae

scholarly journals American Foulbrood in the Czech Republic: ERIC II Genotype of Paenibacillus Larvae Is Prevalent

2021 ◽  
Vol 8 ◽  
Author(s):  
Jana Biová ◽  
Jaroslav Bzdil ◽  
Silvie Dostálková ◽  
Marek Petřivalský ◽  
Jan Brus ◽  
...  
Keyword(s):  
Czech Republic ◽  
Apis Mellifera ◽  
Clinical Symptoms ◽  
Paenibacillus Larvae ◽  
American Foulbrood ◽  
Enterobacterial Repetitive Intergenic Consensus ◽  
The Czech Republic ◽  
Field Isolates ◽  
Border Regions ◽  
Consensus Classification

American foulbrood (AFB) is a dangerous disease of honeybees (Apis mellifera) caused by the spore-forming bacterium Paenibacillus larvae. According to the ERIC (enterobacterial repetitive intergenic consensus) classification, five genotypes are distinguished, i.e., I, II, III, IV, and V, which differ in their virulence and prevalence in colonies. In the Czech Republic, AFB prevalence is monitored by the State Veterinary Administration; however, the occurrence of specific P. larvae genotypes within the country remains unknown. In this study, our aim was to genotype field P. larvae strains collected in the Czech Republic according to the ERIC classification. In total, 102 field isolates from colonies with AFB clinical symptoms were collected from various locations in the Czech Republic, and the PCR genotypization was performed using ERIC primers. We confirmed the presence of both ERIC I and II genotypes, while ERIC III, IV, and V were not detected. The majority of samples (n = 82, 80.4%) were identified as ERIC II, while the ERIC I genotype was confirmed only in 20 samples (19.6%). In contrast to other European countries, the ERIC II genotype is predominant in Czech honeybee colonies. The ERIC I genotype was mostly detected in border regions close to Poland, Slovakia, and Austria.

scholarly journals Queen promiscuity lowers disease within honeybee colonies

2006 ◽  
Vol 274 (1606) ◽  
pp. 67-72 ◽  
Author(s):  
Thomas D Seeley ◽  
David R Tarpy
Keyword(s):  
Apis Mellifera ◽  
Social Insects ◽  
Social Insect ◽  
Adaptive Significance ◽  
Paenibacillus Larvae ◽  
American Foulbrood ◽  
Highly Virulent

Most species of social insects have singly mated queens, but in some species each queen mates with numerous males to create a colony with a genetically diverse worker force. The adaptive significance of polyandry by social insect queens remains an evolutionary puzzle. Using the honeybee ( Apis mellifera ), we tested the hypothesis that polyandry improves a colony's resistance to disease. We established colonies headed by queens that had been artificially inseminated by either one or 10 drones. Later, we inoculated these colonies with spores of Paenibacillus larvae , the bacterium that causes a highly virulent disease of honeybee larvae (American foulbrood). We found that, on average, colonies headed by multiple-drone inseminated queens had markedly lower disease intensity and higher colony strength at the end of the summer relative to colonies headed by single-drone inseminated queens. These findings support the hypothesis that polyandry by social insect queens is an adaptation to counter disease within their colonies.

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