Axenic Insects
Axenic Insects - Related Videos
09:34
Rearing the Fruit Fly Drosophila melanogaster Under Axenic and Gnotobiotic Conditions
0 Views •
Cited by 128 •
2016
A method for rearing Drosophila melanogaster under axenic and gnotobiotic conditions is presented. Fly embryos are dechorionated in sodium hypochlorite, transferred aseptically to sterile diet, and reared in closed containers. Inoculating diet and embryos with bacteria leads to gnotobiotic associations, and bacterial presence is confirmed by plating whole-body Drosophila homogenates.
01:47
Osmoregulation in Insects
0 Views •
2019
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area. Malpighian tubules extend from the digestive tract, typically the area between the midgut and hindgut, into the hemolymph—a mixture of blood and interstitial fluid found in insects and other arthropods, as well as most...
06:56
Preparing and Rearing Axenic Insects with Tissue Cultured Seedlings for Host-Gut Microbiota Interaction Studies of the Leaf Beetle
0 Views •
Cited by 6 •
2021
To obtain an axenic insect, its egg surface is sterilized, and the hatched larva is subsequently reared using axenic leaves. This method provides an efficient way for axenic insect preparation without administering antibiotics or developing an artificial diet, which can also be applied to other leaf-eating insects.
09:00
Insect-controlled Robot: A Mobile Robot Platform to Evaluate the Odor-tracking Capability of an Insect
0 Views •
Cited by 18 •
2016
The capability to localize an odor source is necessary for insect survival and is expected to be applicable to artificial odor-tracking. The insect-controlled robot is driven by an actual silkmoth and enables us to evaluate the odor-tracking capability of insects through a robotic platform.
07:42
A Simple Flight Mill for the Study of Tethered Flight in Insects
0 Views •
Cited by 37 •
2015
Flight in insects is influenced by a number of factors and the propensity to disperse is an important variable in understanding insect ecology and biological control strategies. We describe the construction and use of a simple, relatively inexpensive, and flexible flight mill for measuring parameters of tethered flight in insects.
FAQs
The experimental comparison begins with insects whose associated bacteria, fungi, and other microorganisms are absent. Their development, immunity, nutrition, or health can then be observed without assigning changes to microbial activity. Introducing selected microorganisms afterward allows researchers to distinguish intrinsic host traits from effects produced by particular microbial communities.
A small contamination event can introduce microorganisms and undermine the intended comparison. For this reason, cultures require aseptic handling, sterilized food, and continued monitoring. These controls preserve the separation between the insect and environmental microbes, making observed biological outcomes more reliably attributable to the host or to microbes deliberately introduced later.
Axenic insects are maintained without microorganisms, whereas gnotobiotic experiments introduce selected microbial communities into that controlled background. The distinction is experimental: the axenic state provides a baseline for host biology, while the gnotobiotic state tests how defined microorganisms alter development, immunity, nutrition, health, or other physiological outcomes.
Researchers typically begin by surface-sterilizing eggs or larvae, then transfer them into aseptic conditions. The insects receive sterilized food and remain in a controlled culture while researchers monitor for contamination. This workflow creates a microorganism-free starting point for subsequent observations or for the planned introduction of selected microbes in gnotobiotic studies.
These models support studies of insect development, immunity, nutrition, and pathogen transmission. By removing naturally associated microorganisms from the initial system, researchers can examine whether a biological process occurs as part of the insect’s intrinsic biology or changes when microbial partners are present. The resulting comparisons clarify microbiome effects on physiology and health.
They provide a controlled biological system in which microbial influences can be separated and then examined through defined comparisons. This helps researchers assess how microorganisms affect insect health and physiology, including processes relevant to pathogen transmission. The same controlled framework also supports analysis of how microbiome-related effects may contribute to broader ecological function.