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The effect of ivermectin pour-on administration against natural dictyocoulus viviparous infestations and prevalence rate of that in cattle.

Introduction

Infections with gastrointestinal (GI) nematodes are very common on cattle farms in Iran and all over the world. Parasitic infections of cattle's are majorfactors responsible for economic losses throughreduction in productivity and increased mortality. Parasites cause the animals to be unthrifty which mayinclude the loss of weight, low birth weights and difficulty in kidding. Due to parasitism, the animals become susceptible to other health problems which can lead to death. However, there is substantial evidence that they can also exert important negative effects on the productivity of adult dairy cows (Sanchez et al., 2004a). Many researchers for prevalence rate of gastrointestinal parasites in all the word have been reported but research for effect of anti parasitic drug by different administration ways is low and in Iran the study on present subject has not been done. (Gayrard et al., 1999; Lonneux et al., 1997; Skogerboe et al., 1999). Ivermectin is a member of the macrocyclic lactone class of endectocides, commonly referred to as avermectins. It is labeled for the treatment of internal and external parasites in dogs, cats, horses, pigs, sheep, and cattle. Subcutaneous (SC) and topical (TOP) formulations are available for use in nonlactating dairy cattle, at a dose of 0.2 and 0.5 mg/kg bodyweight (BW), respectively. Ivermectin is a highly potent broad-spectrum anthelmintic that is widely used in cattle. It is available in injectable, oral and topical formulations for use in cattle (Vermunt et al., 1995). The most important GI nematode responsible for considerable production losses in cattle is Dictyocoulus viviparous (Armour, J., 1989). This parasite is ingested as larvae that, after penetration of the intestinal wall, migrate via the lymph nodes and the blood circulation to the lungs, where they mature into adult worms. Eggs produced by theses adults are coughed up, swallowed, and excreted in the feces as first-stage larvae. In the lungs, pathology develops due to the influx and activation of eosinophil's and mast cells that cause restriction of the airways and a collapse of the alveoli, resulting in edema and emphysema (Jarrett et al., 1957). By attention to this subject which in Iran study on pour on administration of ivermectin on Dictyocoulus viviparous has not been done and the facile use of this drug the objective of this paper were to determine the Evaluation of the effect of ivermectin pour-on administration against natural Dictyocoulus viviparous nematode infections and prevalence rate of them in cattle. This study is the first report in Iran.

Material and method

In present study a total number of 120 dubious cattle to Dictyocoulus viviparous infestation, from 20 different farms in Tabriz area for fecal examination and LPG were collected. After 3 times fecal examination, a total number of 120 cattle infected to Dictyocoulus viviparous were distinguished and after this step, infected cattle's isolated and then pour on Ivermectin at a dose of 0/5 mg/kg were administrated. Also pour on form of Ivermectin by melting the Ivermectin powder in solution of Isopropyl alcohol (weight-weight) with 0/5 % concentration were made (Reinemeyer and Courtney, 2001). In this study for differential diagnostic of Dictyocoulus viviparous larvae from other larvae of authentic book were used (Georgi and Georgi, 1990; Kassai, 1999; Soulsby, 1986; Urquhart et al., 2003), also for exact distinguish from fecal culture and shape of L3 (there stage form of larvae) were used (Rehbein et al., 1999). After and before the beginning of cattle treatment, in 3 time fecal samples taken for fecal examination and after examination, results of larvae enumeration in one designed form were written. Fecal examination in days of 1, 7, 21 and 28 after treatment were repeated. In this study for fecal examination from Willis method and for larvae examination (LPG) of Stool method were used (Aguirre et al., 2005; Marley et al., 1995). In end by use of following Formol for determine the effective rate of pour on administration of Ivermectin were used:

% of drug efficacy= P-R/Px100

R= average of parasite larvae number in gr of fecal sample after treatment P=average of parasite larvae number in gr of fecal sample before treatment Data were analyzed by non-parametric crosscal-walis and P<0.05 was considered significant.

Results

The results of present study indicated which from 120 cattle's, 6head of them infected to Dictyocoulus viviparous were distinguished and prevalence rate of this parasite 5% were calculated. Average number of enumerated larvae was 128. The average number of enumerated larvae in fecal samples of different days after treatment with pour on Ivermectin in table 1 has been shown. The rate of Ivermectin pour on administration affect in different days after treatment by formol was calculated and in days of 1,7,14 and 21 was respectively 42.18, 54.68, 90.62 and 99.21. The ivermectin pour on administration reduced the natural parasite infestation.

Conclusion

According to results of crosscal-walis test can say which pour on administration of Ivermectin cases decrease the natural infestation of cattle to Dictyocoulus viviparous. The efficacyrate of Ivermectin on this parasite is upper than 99%. In these days Ivermectin have different drug shapes. Half timeof intra venal administration of Ivermectin with dose of 300|ig/Kg in cattle is 2.8day, but in subcutaneous administration with dose of 200 [micro]g/Kg is 8day and also has been shown that the effect of sustained-releaseadministration of this drug in cattle is very more than to oral and subcutaneous administration of that (Reinemeyer and Courtney, 2001). The importance base in use of antiparasitic drug is the increase of contact time of drugs with parasites is very effective in comparison with increase the dose of these drugs (Georgi and Georgi, 1990; Kassai, 1999; Reinemeyer and Courtney, 2001; Soulsby, 1986; Urquhart et al., 2003). This subject has been demonstrated that Ivermectin with dose of 1mg/Kg (oral or injection) have effective antiparasitic role in veterinary. The dose of this drug in cattle for oral and subcutaneous administration is 0.2mg/Kg and for pour on administration is 0.5mg/Kg; these doses of Ivermectin have importance antihelmintic effect between 97-100% on adult form and [L.sub.4] (forth stage of larvae) of Haemonchus, Ostertagia, Cooperia, Trichostrongylus, Strongyloides, Bonostomum, Nematodirus, Trichuris, Oesophagostomum, Dictyocaulus and Chabertia ovina, also with these doses have effective role in reduce of some arthropods (Georgi and Georgi, 1990; Kassai, 1999; Reinemeyer and Courtney, 2001; Soulsby, 1986; Urquhart et al., 2003). According to findings of researchers tablet form of Ivermectin with dose of 0.4mg/Kg causes reduce in eggs in feces during 10 week after treatment but have not protective role for reinfection of cattle with one dose of drug administration. Subcutaneous administration of Ivermectin with dose of 0.2mg/Kg and pour on of that with 0.5mg/Kg dose, have high effective role for control of parasites, also have importance protective role for reinfection in cattle's. Also according to findings of researchers one administration of Ivermectin with dose of 0.5mg/Kg have high effect between 95-100% on Haemonchus, Oesophagostomum and Bunostomum (Egerton et al., 1981; Gary and Kumar, 2007; Reinemeyer and Courtney, 2001) and when Ivermectin with present dose used, in this time have importance effect on Boophilus, Damalina and others arthropods (Aguirre et al., 2005; Barth and Preston, 1988; Chaudhri et al., 2003; Lonneux et al., 1997; Marley et al., 1993; Reinemeyer and Courtney, 2001). Doramectin administration (with Ivermectin are in one family) after 14 and 21 days respectively 99.2 and 90.7% on Cooperia, after 21 and 28 day respectively 99.9 and 93.7% on Ostertagia, after 21and 28 days respectively 100 1nd 99.9% on Dictyocaulushave importance effect. In one study on natural infestation of cattle's, Doramectin causes deleting this infestation to Ostertagia and Cooperia respectively in days of 19 and 22. By attention to this subject that effect of drug on most parasites is after days of 14, therefore permanent of drug on surface of body have very importance in effective rate of drugs (Reinemeyer and Courtney, 2001). In present study effective rate in day of 28 after treatment by pour on Ivermectin administration on Dictyocoulus viviparous 99.22% determined which with calculated effective rate of Taylor and et al. (1995) is confirm (Soulsby, 1986; Taylor et al., 1990). Williams and et al. in one study on natural infected cattle's to Ostertagia, Cooperia, Oesophagostomum, Trichostrongylus, Haemonchus and Bunostomum with comparison the effect of injection Doramectin and Ivermectin with pour on Ivermectin shows which these 3 drugs causes decrease the number of eggs and larvae of these parasites in feces and from effect comparison aspect these drugs have not considered different and they reported which pore on administration of these is similar to injection administration (Williams et al., 1997). In study by Eysker and et al. (1998) indicated which this drug have protective effect on cattle and causes reduce the specific antigen of Cooperia oncophora. In other study by Williams and et al. on comparison the effect of pour on administration of Ivermectin, Doramectin, Eprinomectin and Moxidectin shown that maximum and minimum effect was with Eprinomectin and Ivermectin observed respectively (Williams et al., 1999). In one study on comparison the effect of suspension Albendazole, Oxfendazole, and Fenbendazole with pour on Ivermectin on gastrointestinal and respiratory nematods indicated which maximum effect was with pour on administration of Ivermectin with 99.2, 98.3 and 98.1% effect on Ostertagia, Cooperia and Dictyocaulus respectively and minimum rate was with Fenbendazole (63.6, 17.7 and 39.7) and Oxfendazole (78.5, 42.1 and 32%) (Williams et al., 1997).

Gayrard and et al (1999) says that can use of Ivermectin and Doramectin for control of gastrointestinal parasites in cattle. Whang and et al has been reported which pour on and injection administration of Moxidectin have positive effect more than 90% on Ostertagia and Cooperia and significant different between these two type of administration were not reported (Whang et al., 1994). In two studies by Williams and et al indicated that Moxidectin have very importance role for control of parasitic disease (Williams et al., 1996; 2003). Skogerboe and Rehbein and et al reported that pour on administration of Ivermectin during rain too have antiparasitic effect upper 90% and rain have not specific effect on reduction the role of Ivermectin (Skogerboe et al., 1999; Whang et al., 1994), of course other studies on this subject has been done and indicated that during raining pour on Ivermectin is active against parasites (Skogerboe et al., 1999; Taylor et al., 1990; 1995). In fact pour on administration of Ivermectin is very easy for farmers and so far for this way of Ivermectin administration any specific side effect has not been reported Reinemeyer and Courtney, (2001). In end can say Ivermectin is very effective drug for control of gastrointestinal parasites in ruminant and use of that is very easy and have not need to specific tools. Of course effect of pour on administration of Ivermectin on other helminths and arthropods need to more studies.

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Corresponding Author: Garedaghi Yagoob, Department of Pathobiology, Tabriz Branch, Islamic Azad University, Tabriz, Iran. Tel: 0098 914 311 0499 E-mail:Y_garedaghi@yahoo.com

(1) Garedaghi Yagoob, (2) khayatnouri Mirhadi, (3) Safarmashaei Saeid

(1) Department of Pathobiology, Tabriz Branch, Islamic Azad University, Tabriz, Iran.

(2) Department of Pharmacology, Tabriz Branch, Islamic Azad University, Tabriz, Iran.

(3) Tabriz Branch, Islamic Azad University, Young Researchers club.
Table 1: Average number of enumeration the larvae in fecal samples of
different days of before and after the treatment with pour on
Ivermectin

 Before     1 day after   7 days after   21 days after   28 days after
treatment    treatment     treatment       treatment       treatment

  128           74            58              12               1

Table 2: rate of Ivermectin pour on administration affect in
different days after treatment for control of Dictyocoulus viviparous

1 day after   7 days after   21 days after   28 days after
 treatment     treatment       treatment       treatment

  42.18          54.68           90.62           99.21
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Title Annotation:Original Article
Author:Yagoob, Garedaghi; Mirhadi, khayatnouri; Saeid, Safarmashaei
Publication:Advances in Natural and Applied Sciences
Article Type:Report
Geographic Code:7IRAN
Date:Apr 1, 2011
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