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Titolo:
Adult honeybee's resistance against Paenibacillus larvae larvae, the causative agent of the American foulbrood
Autore:
Riessberger-Galle, U; von der Ohe, W; Crailsheim, K;
Indirizzi:
Graz Univ, Inst Zool, A-8010 Graz, Austria Graz Univ Graz Austria A-8010Graz Univ, Inst Zool, A-8010 Graz, Austria Niedersachs Landesinst Beinenkunde, D-29221 Celle, Germany Niedersachs Landesinst Beinenkunde Celle Germany D-29221 Celle, Germany
Titolo Testata:
JOURNAL OF INVERTEBRATE PATHOLOGY
fascicolo: 4, volume: 77, anno: 2001,
pagine: 231 - 236
SICI:
0022-2011(200105)77:4<231:AHRAPL>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
APIS-MELLIFERA L; BACILLUS-LARVAE; ANTIBACTERIAL PEPTIDES; CARNICA; DISEASE; BEES; HYMENOPTERA; DEPENDENCE; TYLOSIN; WORKER;
Keywords:
Apis mellifera L.; Paenibacillus larvae larvae; resistance mechanism; bacterial growth-inhibiting substances; nursebee; winterbee;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Riessberger-Galle, U Graz Univ, Inst Zool, Univ Pl 2, A-8010 Graz, AustriaGraz Univ Univ Pl 2 Graz Austria A-8010 raz, Austria
Citazione:
U. Riessberger-Galle et al., "Adult honeybee's resistance against Paenibacillus larvae larvae, the causative agent of the American foulbrood", J INVER PAT, 77(4), 2001, pp. 231-236

Abstract

American foulbrood is a widespread disease of honeybee larvae caused by the spore-forming bacterium Paenibacillus larvae subsp. larvae. Spores represent the infectious stage; when ingested by a larva they germinate in the midgut. The rod-shaped vegetative forms penetrate the larva's intestinal tissue and start multiplying rapidly, which finally kills the larva. Spores fedto adult honeybees, however, do not harm the bees. We investigated this phenomenon. Specifically, we studied the influence of the adult honeybee midgut on the vegetative growth and on the germination of spores of P. larvae larvae. We focused on two groups of adult workers that are likely to have large numbers of spores in their gastrointestinal tracts in infected colonies: middle-aged bees, which are known to remove or cannibalize dead larvae and clean brood cells, and winterbees, which do not have frequent chances to defecate. We found that midgut extract from winterbees and worker-aged beesof different colonies almost completely inhibited the growth of the vegetative stage of P. larvae larvae and suppressed the germination of spores. The inhibiting substance or substances from the adult midgut are very temperature stable: they still show about 60% of their growth-inhibiting capacity against this bacterium after 15 min at 125 degreesC. We established a method to test growth-inhibiting factors against P. larvae larvae in vitro. (C) 2001 Academic Press.

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Documento generato il 04/04/20 alle ore 22:35:33