Cannibalism as a possible entry route for opportunistic pathogenic bacteria to insect hosts, exemplified by pseudomonas aeruginosa, a pathogen of the giant mealworm Zophobas morio
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Cannibalism as a possible entry route for opportunistic pathogenic bacteria to insect hosts, exemplified by pseudomonas aeruginosa, a pathogen of the giant mealworm Zophobas morio. / Maciel Vergara, Gabriela ; Jensen, Annette Bruun; Eilenberg, Jørgen.
In: Insects, Vol. 9, No. 3, 88, 2018, p. 1-15.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Cannibalism as a possible entry route for opportunistic pathogenic bacteria to insect hosts, exemplified by pseudomonas aeruginosa, a pathogen of the giant mealworm Zophobas morio
AU - Maciel Vergara, Gabriela
AU - Jensen, Annette Bruun
AU - Eilenberg, Jørgen
PY - 2018
Y1 - 2018
N2 - Opportunistic bacteria are often ubiquitous and do not trigger disease in insects unless the conditions are specifically favorable for bacterial development in a suitable host. In this paper, we isolated and identified a bacterium, Pseudomonas aeruginosa, from the larvae of the giant mealworm Zophobas morio and we studied the possible entry routes by challenging larvae with per os injection and subdermal injection. We also evaluated the effect of exposing groups of larvae to P. aeruginosa inoculated in their feed and the effect of exposing wounded larvae to P. aeruginosa. We concluded that the mortality rate of Z. morio larvae is higher when P. aeruginosa gets in direct contact with the hemolymph via intracoelomic injection compared to a situation where the bacterium is force-fed. Larvae with an open wound exposed to P. aeruginosa presented higher mortality rate compared to larvae with a wound that was not exposed to the bacterium. We documented too, that cannibalism and scavenging was more prevalent among larvae in a group, when P. aeruginosa is present compared to when it is absent. We discuss hereby different aspects related with the pathogen’s entry routes to insects the complexity of pathogen’s transmission in high population densities and different ways to prevent and/or control P. aeruginosa in mass rearing systems.
AB - Opportunistic bacteria are often ubiquitous and do not trigger disease in insects unless the conditions are specifically favorable for bacterial development in a suitable host. In this paper, we isolated and identified a bacterium, Pseudomonas aeruginosa, from the larvae of the giant mealworm Zophobas morio and we studied the possible entry routes by challenging larvae with per os injection and subdermal injection. We also evaluated the effect of exposing groups of larvae to P. aeruginosa inoculated in their feed and the effect of exposing wounded larvae to P. aeruginosa. We concluded that the mortality rate of Z. morio larvae is higher when P. aeruginosa gets in direct contact with the hemolymph via intracoelomic injection compared to a situation where the bacterium is force-fed. Larvae with an open wound exposed to P. aeruginosa presented higher mortality rate compared to larvae with a wound that was not exposed to the bacterium. We documented too, that cannibalism and scavenging was more prevalent among larvae in a group, when P. aeruginosa is present compared to when it is absent. We discuss hereby different aspects related with the pathogen’s entry routes to insects the complexity of pathogen’s transmission in high population densities and different ways to prevent and/or control P. aeruginosa in mass rearing systems.
KW - Bacterial infection
KW - Cannibalism
KW - Disease transmission
KW - Entry route
KW - Insect rearing
KW - Opportunistic microorganism
U2 - 10.3390/insects9030088
DO - 10.3390/insects9030088
M3 - Journal article
C2 - 30042293
AN - SCOPUS:85051072540
VL - 9
SP - 1
EP - 15
JO - Insects
JF - Insects
SN - 2075-4450
IS - 3
M1 - 88
ER -
ID: 202936802