This experiment is from the official website of Parasitology, School of Medicine, Shandong University.

Operation method

Morphological observation experiment of leather mite

Principle

Leather mites are the most diverse and widely distributed group of mites. The life history of leather mite is divided into five stages: egg, larva, first echinococcus, second echinococcus and adult, and the leather mite is divided into two categories: autochthonous and parasitic life, and the host of the leather mite is very wide, and it has an important relationship with a lot of natural epidemic diseases. The larval stage of parasitic leather mites does not suck blood.

Move

I. Adult morphology: slide specimens are shown and taught:

Body round or ovoid, yellow or brown, size 0.2-0.5 mm, body epidermis is membranous, composed of two parts: palpus and carapace.

1. Palate

(1) Palatine base: cervical.

(2) Chelicerae 1 pair, consisting of chelicerae (basal segments) and chelicerae (terminal segments), chelicerae divided into movable and fixed toes; females may have pincer teeth on fixed toes.

(3) Tentacles: 1 pair, protruding from both sides of the palatine base, finger-like, generally divided into 5 segments, with a stout forked hair on the inner side of the terminal segment.

(2) Carapace: dorsoventrally flattened.

(1) Dorsal: with 1-2 dorsal plates.

(2) Ventral: females have thoracic, genital, abdominal and anal plates on the ventral side of the carapace; males tend to fuse into a single plate called the full ventral plate. There are 4 pairs of legs, each divided into 6 segments (including basal, rotary, femoral, knee, tibial and tarsal segments). One pair of valves is located on the outside of the third and fourth pairs of feet between the basal segments in the form of round holes.

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