Difference between revisions of "Psoroptes ovis"
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| + | | Predilection site | ||
| + | | '''Skin'''; particularly on legs, feet, and the base of the tail. | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | ===Introduction=== | ||
| + | |||
| + | Psoroptes ovis are astigmatic, non-burrowing mites around 750μm (0.75mm) in length, and oval shaped. They are extremely pruritic, and cause a contagious skin disease, as well as a loss in body condition. They also cause the host to rub and bite the infected areas, causing further trauma. | ||
| + | |||
| + | ===Hosts=== | ||
| + | |||
| + | Sheep, cattle, goats, horses, rabbits, and camelids. | ||
| + | |||
| + | ===Life Cycle=== | ||
| + | |||
| + | The eggs are relatively large, and within around 2 days transform into a hexapod larva. The larvae then moult into a protonymph , which then subsequently moults into a tritonymph. Finally the tritonymph moults to become a mature adult. | ||
| + | |||
| + | Each stage takes around 2 days to complete. The total duration from egg to adult, takes around 10 days, but this figure can longer | ||
| + | |||
| + | |||
| + | ===Identification=== | ||
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| + | |||
*Males identified by copulatory suckers and paired posterior lobes | *Males identified by copulatory suckers and paired posterior lobes | ||
Revision as of 11:07, 9 July 2010
| Predilection site | Skin; particularly on legs, feet, and the base of the tail. |
Introduction
Psoroptes ovis are astigmatic, non-burrowing mites around 750μm (0.75mm) in length, and oval shaped. They are extremely pruritic, and cause a contagious skin disease, as well as a loss in body condition. They also cause the host to rub and bite the infected areas, causing further trauma.
Hosts
Sheep, cattle, goats, horses, rabbits, and camelids.
Life Cycle
The eggs are relatively large, and within around 2 days transform into a hexapod larva. The larvae then moult into a protonymph , which then subsequently moults into a tritonymph. Finally the tritonymph moults to become a mature adult.
Each stage takes around 2 days to complete. The total duration from egg to adult, takes around 10 days, but this figure can longer
Identification
- Males identified by copulatory suckers and paired posterior lobes
- Males attach to deutonymphs (second moult after larval stage) in a process called copula
- Males remain in copula until females moult for the last time
- Copulation occurs
- Life cycle last 14 days
- Transmitted by direct contact between sheep
- Indirect transmission can also occur