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25 Cards in this Set
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Ascaris suum description |
pig roundworm location small intestine adult large, pink/yellow, 3 lips egg thick shell, rough shell, brownish-yellow |
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life cycle Ascaris suum |
egg passed in feces egg embryonates to L2 egg + L2 = infective stage egg + L2 ingested larvae go through GI wall liver hepatic v heart lung up bronchi, coughed up, swallowed mature to adults in SI |
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how long is prepatent pd in Ascaris suum |
LONG - 60-62 d |
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how many eggs excreted with Ascaris suum |
a lot! female can make 200,000 - 1 million eggs/d |
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how long does ascaris suum live |
55 weeks (just over 1 yr) |
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how long does it take ascaris suum egg to embroyonate |
long time - if optimal humidity and temp 4-5 weeks, usually 10 weeks |
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how long do ascaris suum eggs live in env |
up to one year, longer in moist, sandy soil |
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who is infected with ascaris suum |
heavy infections are in younger animals (2-5 mo), get from environment older animals are partially immune, decreased eggs made and eggs are infertile (clear looking) |
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pathology ascaris suum |
liver - milk spots - disappear if light infection, stay and larger if heavy infection starry sky appearance, lymphonodular lesions liver if heavy infection |
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significance of liver lesions ascaris suum |
livers condemned at slaughter |
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pathology ascaris suum lungs |
verminous pneumonia, can be severe |
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pathology ascaris suum GI |
interfere with growth, nutrition, rarely perf, obstruction |
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clinical signs ascaris suum |
heavy inf and young animal - pneumonia, stunted growth, diarrhea subclinical - poor growth |
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dx ascaris suum |
pneumonia - mince lung tissue + baerrman fecal float eggs- young animals - EPG <1000 = 4, <10,000 = 8, >10,000 = 14 necropsy |
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tx ascaris suum |
prevent inf early in life pyrantel tartrate daily - stops migration levimasole, piperazine, ivermectin, doramectin many days fenbendazole |
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control ascaris suum |
clean no bedding deworm 2 d before farrowing dworm piglets at weaning dworm feeders q 7 wk |
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strongyloides ransomi description |
intestinal threadworm location - SI parthenogenic female - blunted tail egg - larvated, thin shell, ellipsoidal |
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transmission strongyloides ransomi |
transplacental and transmammary |
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does immunity occur to strongyloides ransomi |
yes, one infection = strong immunity |
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prepatent pd strongyloides ransomi |
3-9 d 3 d if colostrum 6 d if oral or skin |
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what is reservoir of strongyloides ransomi |
adult swine, esp sows |
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who gets c.s. of strongyloides ransomi, what are they |
nursing piglets, get acute enteritis, huge amounts of worms embedded in SI cause hemorrhage, loss intestinal function, dermatitis if L3 goes through skin |
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dx strongyloides ransomi |
eggs in feces |
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tx strongyloides ransomi |
benzimidazoles, macrolides tx sows 4-5 d before farrowing w ivermectin to stop colostrum transm tx nursing pigs 5-10 d after birth w benzimadazole clean |
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