How many Spiracular slits does a second instar maggot have in each posterior Spiracle?
How many Spiracular slits does a second instar maggot have in each posterior Spiracle?
two spiracular slits
The posterior spiracle of second instar larva has two spiracular slits with no thickening of peritreme. This differentiates it from the third instar, whereby the latter has three slits for each posterior spiracle.
How many instars do tabanidae larvae have?
The number of larval instars is variable ranging from 7–11 instars. Tabanid larvae can be found in dense populations and some are predators of other invertebrates and annelids (worms), while others are detritivores. However, much of the feeding habits of many species are unknown.
What do first instar tabanidae larvae feed on?
Mostly, the larvae eat small organisms such as insects, crustaceans, snails, earthworms, and other small invertebrates. Tabanidae larvae will also eat other tabanidae larvae. Although mostly predatory, deer flies also feed on organic debris from animals or plants that is deposited among the substrate.
Why do calliphoridae extensively walk across a potential oviposition site?
Why do Calliphoridae extensively walk across a potential oviposition site? They are testing the site with their feet. Where do first instar maggots tend to feed? Which of these hosts is a reservoir for the SECONDARY cycle of Western Equine Encephalitis?
What is posterior Spiracle?
The posterior spiracles are in the form of a pair of elongate, posteriorly directed hooks with openings along the sides. The third-stage larva pierces the body wall of the host with the posterior spiracles which provides contact with the air.
When examining the maggot under the microscope how many Spiracle slits does the maggot have?
Typical maggot shape, 15-17mm long, bands of spines encircling anterior margin of each body segment. Oval, 11-15mm, 3 curved slits in spiracles, numerous small black spines. Up to 23mm long, scattered spines, 3 sinuous slits in each posterior spiracle.
Do horse flies have stripes?
Deer flies in the genus Chrysops are up to 10 mm (0.4 in) long, have yellow to black bodies and striped abdomens, and membranous wings with dark patches. Horse-flies (genus Tabanus) are larger, up to 25 mm (1 in) in length and are mostly dark brown or black, with dark eyes, often with a metallic sheen.
How many eggs does a horsefly lay?
Females lay batches of 25 to 1,000 eggs on vegetation that stand over water or wet sites. The larvae that hatch from these eggs fall to the ground and feed upon decaying organic matter or small organisms in the soil or water. The larvae, stage usually lasts from one to three years, depending on the species.
What do horsefly larva eat?
In some species, the larvae are voracious predators of other small animals, including insects, small fish, and more. Others eat detritus. Adults eat nectar and pollen from flowers. Females (but not males) also drink blood.
What do horse flies feed on?
Diet. Horse fly females are aggressive blood feeders, while males do not consume blood but feed on pollen and plant nectars.
Where do first instar maggots tend to feed?
Dermatobia hominis. The first instar larvae remain on the mosquito until it takes a blood meal from a human host. The larvae then leave the mosquito and penetrate the human host’s skin. Larvae feed inside a subdermal cavity for 5-10 weeks. When mature, they burrow out of the skin, drop to the ground and pupate.
Which species is most likely to be used for maggot therapy ENTO 208?
Lucilia sericata (Phaenicia sericata), or the common green bottlefly, is the preferred species used in maggot therapy.
What kind of ocular injury is chorioretinitis sclopetaria?
ICD 10: H30.103: Unspecified chorioretinal inflammation bilateral. Chorioretinitis Sclopetaria is a closed globe ocular injury causing rupture of the choroid and retina from the forces of a high velocity object (projectile) passing very close to the globe.
What happens to the choroid and retina in sclopetaria?
The result is a full-thickness defect involving the choroid, Bruch’s membrane, retina, with an intact sclera. As the etiology of sclopetaria is due to a high velocity object passing near the globe, it can create significant shock waves with enough force to retract the choroid and retina with bare sclera at the site of injury.
Who is at risk for retinal hemorrhage with sclopetaria?
Patients with sclopetaria are at increased risk of progression or delayed presentation of vitreous hemorrhage and retinal detachment. Retinal detachment is considered less likely due to the fibroglial scarring between the choroid and retina, as well as the typically young patient population with intact vitreous.
How is the choriocapillaris attached to the eye?
The clinical and pathological findings are a result of differences in elasticity in the various parts of the eye. Bruch’s membrane is inelastic and ruptures easily with compressive forces. The choriocapillaris is attached to this membrane which further leads to acute subretinal hemorrhage.