Migration route of Dictyocaulus viviparus and D. filaria infective larvae to the lungs

1953 ◽  
Vol 63 ◽  
pp. 75-84 ◽  
Author(s):  
K.N. Soliman
Keyword(s):  
Migration Route ◽  
Dictyocaulus Viviparus ◽  
Infective Larvae

Gastrointestinal helminths of woodland and barren ground caribou (Rangifer tarandus) in Canada, with keys to species

1989 ◽  
Vol 67 (9) ◽  
pp. 2253-2269 ◽  
Author(s):  
Michael Fruetel ◽  
Murray W. Lankester
Keyword(s):  
North America ◽  
Rangifer Tarandus ◽  
Gastrointestinal Nematodes ◽  
Gastrointestinal Helminths ◽  
Dictyocaulus Viviparus ◽  
Parasitic Helminths ◽  
Infective Larvae ◽  
Barren Ground ◽  
First Time ◽  
Common Parasite

A total of 21 species of parasitic helminths was recovered from wild and captive caribou. Gastrointestinal nematodes were represented by eight species of Ostertagiinae, four species of Nematodirinae, Trichostrongylus axei, T. vitrinus, Oesophagostomum venulosum, Trichuris ovis, Skrjabinema sp., and Capillaria sp. Other helminths included Dictyocaulus viviparus, Setaria yehi, and Moniezia sp. Nematodirus odocoilei, a common parasite of Odocoileus spp. is reported from caribou for the first time. Ostertagia leptospicularis is reported from North America for the first time. Illustrations and diagnostic keys are provided for the eggs, infective larvae, and adults of the gastrointestinal nematodes recovered from caribou.

On the Migration Route of the Infective Larvae ofNippostrongylus brasiliensis

1961 ◽  
Vol 35 (1-2) ◽  
pp. 101-108 ◽  
Author(s):  
H. M. Gharib
Keyword(s):  
Lymphatic System ◽  
Blood Stream ◽  
Migration Route ◽  
Lymphatic Gland ◽  
Infective Larvae

Some experiments were carried out on the migration route of the parasiteN. brasiliensis. The infective larvae migrate to the lungs via the lymphatic system and not by the blood stream. The larvae reached the lymphatic gland draining the site of infection from 12 to 17 hours after normal exposure to infection and the lungs from 18 hours onwards.

Heterologous transmission with Dictyocaulus capreolus from roe deer (Capreolus capreolus) to cattle (Bos taurus)

2002 ◽  
Vol 76 (2) ◽  
pp. 125-130 ◽  
Author(s):  
B.P. Divina ◽  
J. Höglund
Keyword(s):  
Roe Deer ◽  
Bos Taurus ◽  
Capreolus Capreolus ◽  
Post Inoculation ◽  
Infected Calf ◽  
Patent Period ◽  
Dictyocaulus Viviparus ◽  
Infective Larvae ◽  
Swedish Isolate ◽  
Patent Infection

AbstractEight Swedish Red Breed cattle, about 2 months old, were experimentally infected with a Swedish isolate of Dictyocaulus viviparus (Dviv-Se) from cattle and D. capreolus from roe deer. The aims were to determine whether the roe deer lungworm is infective to cattle or if it can induce seroconversion in cattle against D. viviparus as measured with an ELISA. Four calves which were given 500 Dviv-Se infective larvae (L3) each by larval dosing for two successive days developed patent infection between days 23 and 25 post-inoculation (PI). Larval output varied among the calves and during the patent period. However, maximum recovery occurred between 28 and 56 days PI with peak shedding on day 37 PI. Shedding ceased at day 58 PI and adult worms were recovered from one calf at necropsy (day 67 PI). No immature worms were recovered from the lungs at necropsy. Seroconversion was detected on days 35–42 PI. One Dviv-Se infected calf became seronegative on day 67 PI whereas the other calves still remained seropositive during this period. Prepatency and patency periods of D. viviparus and serological findings in this study basically conform to previous studies. Each calf that was infected with 400 L3 of D. capreolus for two successive days, and about 800 L3 of the same species about 8 weeks later, did not develop to patency based on faecal and post-mortem examinations. Consequently, under the conditions of this study, D. capreolus was not infective to cattle. Two of the four calves that were infected with L3 from roe deer were challenged with L3 cultured from faeces of the Dviv-Se-infected calves. This infection did not develop to patency. Whether this was due to cross-protection as a result of the prior priming with L3 from roe deer is not clear. However, if it is so, it opens up the possibility of using D. capreolus L3 for preventing bovine dictyocauliasis.

Studies onDracunculus medinensis(Linnaeus) I. The Early Migration Route in Experimentally Infected Dogs

1968 ◽  
Vol 42 (3-4) ◽  
pp. 331-338 ◽  
Author(s):  
Ralph Muller
Keyword(s):  
Evans Blue ◽  
Intestinal Wall ◽  
Direct Search ◽  
Thoracic Wall ◽  
Migration Route ◽  
Infective Larvae ◽  
Early Migration

1. Ten dogs were given infective larvae ofDracunculus medinensis, originally from human cases in Western Nigeria, and bred in the laboratory inCyclops leuckarti(Claus).2. Parasites were found in seven of the dogs when dissected at intervals between 4 hours and 36 days. From an examination of the location of the larvae obtained, both by direct search and by the use of intravenous Evans' blue, it was concluded that they migrated directly through the tissuesviathe intestinal wall (about 13 hours), abdominal mesenteries (found at 7 and 10 days), and muscles of the abdominal and thoracic wall (15 days). A similar route of migration is believed to take place in cats from an examination of three positive kittens.3. Almost no increase in length of the larvae occurred during the migration; these measured an average of 0·59 mm. in length after 15 days.4. No moult was observed up to 36 days but one may have been missed.

scholarly journals Effect of infection with lungworms (Dictyocaulus viviparus) on energy and nitrogen metabolism in growing calves

1986 ◽  
Vol 55 (2) ◽  
pp. 351-360 ◽  
Author(s):  
J. E. G. M. Kroonen ◽  
M. W. A. Verstegen ◽  
J. H. Boon ◽  
W. Van Der Hel
Keyword(s):  
Heat Production ◽  
Energy Requirement ◽  
Nitrogen Retention ◽  
Live Weight ◽  
Feed Conversion ◽  
Dictyocaulus Viviparus ◽  
Infective Larvae ◽  
Antibody Titres ◽  
Maintenance Energy Requirement ◽  
Considerable Damage

1. Ten Friesian male calves of about 100 kg and 3 months old were reared similarly and were worm-free. From 13 weeks of age five calves received a dose of 640 infective larvae (L3) of lungworms (Dictyocuulus viviparus) twice weekly for 8 weeks to simulate continuous infection. Animals not infected were fed to the same level as the infected animals (about 1.2–1.3 kg concentrates and 14–1.5 kg good-quality hay/d).2. Heat production was measured twice weekly during 48 h (days 2 and 3, and days 5 and 6) in each group of experimental animals.3. Infection caused considerable damage to the lungs, increased respiration frequency and clearly produced antibody titres against D. viviparus.4. Animals infected with lungworms had on average a lower rate of weight gain, reduced by 70 g/d per animal. Digestibility was not affected. Nitrogen retention was much lower in infected animals (12.0 v. 14.6 g/d per animal in controls).5. Metabolizability of energy was slightly reduced in infected animals. Heat production as found in infected animals may be associated with an increased maintenance energy requirement of 30 kJ/kg live weight0.75 per d or reduced partial efficiency of feed conversion above maintenance in animals infected with lungworms (58.5 v. 64.1 % in the control animals).6. It was concluded that the depression in rate of gain was related to reduced intake of feed and to decreased N retention.

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