Difference between revisions of "Ascaridia - Poultry Flashcards"
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|q1=What species of ascarid affect poultry? | |q1=What species of ascarid affect poultry? | ||
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*Via the egg as the adults migrate through the lumina of the large intestine and cloaca and end up in the oviduct where they are then incorporated into the hen’s egg | *Via the egg as the adults migrate through the lumina of the large intestine and cloaca and end up in the oviduct where they are then incorporated into the hen’s egg | ||
*Eating earthworms that have ingested ''A. galli'' eggs | *Eating earthworms that have ingested ''A. galli'' eggs | ||
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|l17=Ascaridia - Poultry#Epidemiology | |l17=Ascaridia - Poultry#Epidemiology | ||
| + | |q18=How can ''A.galli'' be diagnosed? | ||
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| + | Ascaridia can be diagnosed by the above clinical, faecal examination or by post-mortem (PM). Evidence of enteritis/haemorrhagic enteritis can be seen on PM; as large numbers of larvae in the histotropic phase can cause extensive damage to the glandular epithelium. Adhesion of the mucosal villi can also be noted as a result of the proliferation of mucous-secretory cells. | ||
| + | Adult worms can also cause damage to the epithelia as a result of pressure atrophy of the villi, causing occasional necrosis of the mucosal layer. In chronic infections the intestinal wall can become distended as muscle tone is lost. | ||
| + | |l18=Ascaridia - Poultry#Diagnosis | ||
Revision as of 15:20, 1 July 2011
| Question | Answer | Article | |
| What species of ascarid affect poultry? |
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Link to Article | |
| What part of the GI tract can these ascarids be found in? | The small intestine. |
Link to Article | |
| What effect do these parasites have of poultry? |
|
Link to Article | |
| Do the male or female ascaridia tend to be bigger? | Females are bigger as they range from 72 to 116 mm in length; whereas males only range from 51 to 76 mm in length. |
Link to Article | |
| What distinguishing properties do males have? |
|
Link to Article | |
| Where is the opening to the females reproductive organs? | In the middle of the body. |
Link to Article | |
| What is the main host for A.Galli? | Chickens, but it can also infect:
|
Link to Article | |
| What species of bird does A. dissimilis infect? | Turkeys |
Link to Article | |
| What species of bird does A. columbae infect? | Pigeons |
Link to Article | |
| What are the clinical signs associated with an ascaridia infection in poultry? |
|
Link to Article | |
| At what age in chickens does A.galli produce more severe clinical signs? | Up to 3 months of age, after which the worm burden normally decreases. |
Link to Article | |
| What is the distributoionof ascaridia in poultry? | Worldwide |
Link to Article | |
| What type of life cycle does A.galli have? | A direct life cycle. |
Link to Article | |
| What is the infective stage of the ascaridia species? | L3 larval stage within the embryonated egg. |
Link to Article | |
| What is meant by the term histotropic phase? | This is where the ascaridia embed themselves into the mucosal layer of the intestines after ingestion. The length of this period before the final maturation has been reported to be between 3 to 54 days. |
Link to Article | |
| How long is the prepatent period for A.galli? | 5 -8 weeks |
Link to Article | |
| How is A.galli transmitted? |
|
Link to Article | |
| How can A.galli be diagnosed? | Ascaridia can be diagnosed by the above clinical, faecal examination or by post-mortem (PM). Evidence of enteritis/haemorrhagic enteritis can be seen on PM; as large numbers of larvae in the histotropic phase can cause extensive damage to the glandular epithelium. Adhesion of the mucosal villi can also be noted as a result of the proliferation of mucous-secretory cells. Adult worms can also cause damage to the epithelia as a result of pressure atrophy of the villi, causing occasional necrosis of the mucosal layer. In chronic infections the intestinal wall can become distended as muscle tone is lost. |
[[Ascaridia - Poultry#Diagnosis
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