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First Report of Ostertagia Leptospicularis (Nematoda: Trichostrongyloidea) in Calves (Bos Taurus) from North America1

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First Report of Ostertagia Leptospicularis (Nematoda: Trichostrongyloidea) in Calves (Bos Taurus) from North America1 260 JOURNAL OF THE HELMINTHOLOGICAL SOCIETY helminths in perch (Perca fluviatilis L.) from the Oklahoma reservoir. Bulletin of the Wildlife Dis- Macha Lake fishpond system, Czechoslovakia. ease Association 5:48-67. Acta Universitatis Carolinae-Biologica 1985:301- Valtonen, E. T., P. Rintamaki, and M. Lappalainen. 318. 1989. Triaenophorus nodulosus and T. crassus in Spall, R. D., and R. C. Summerfelt. 1969. Host-par- fish from northern Finland. Folia Parasitologica asite relations of certain endoparasitic helminths 36:351-370. of the channel catfish and white crappie in an J. Helminthol. Soc. Wash. 58(2), 1991, pp. 260-262 Research Note First Report of Ostertagia leptospicularis (Nematoda: Trichostrongyloidea) in Calves (Bos taurus) from North America1 DONNA M. MULROONEY, JANELL K. BISHOP, AND GARY L. ZIMMERMAN College of Veterinary Medicine, Oregon State University, Corvallis, Oregon 97331 ABSTRACT: Specimens of Ostertagia leptospicularis (Kutzer and Hinaidy, 1969), caribou, Rangifer were recovered from abomasa of 17 of 23 naturally tarandus (Freutel and Lankester, 1989), cattle, infected calves in Oregon. Also present were: Oster- Bos taurus (Rose, 1963, 1968; Hinaidy et al., tagia kolchida, Ostertagia lyrata, and Ostertagia os- tertagi. The co-occurrence of specific pairs of species 1972), and sheep, Ovis aries (Swierstra et al., (O. leptospicularis: O. kolchida, and O. ostertagi: O. 1959; Nilsson, 1971). lyrata) supports the hypothesis of polymorphic species The data presented in this report support the pairs within the Ostertagiinae. This is the first report hypothesis of polymorphism suggested by Lan- of O. leptospicularis and the second of O. kolchida in cattle from North America. caster and Hong (1981). A report by Lichtenfels KEY WORDS: Oregon, Ostertagia leptospicularis, et al. (1988) also supports this hypothesis and Nematoda provides a redescription of 7 species of the Os- tertagiinae that are considered to be polymorphs Ostertagia leptospicularis Asadov, 1953, is a of only 3 species, with each species pair being common abomasal parasite of members of the morphological variants of a single species. Be- Cervidae and has been found in the abomasum tween each polymorphic species pair, the major of other sylvatic and domestic ruminants. The and minor species are usually found together, known geographic range of O. leptospicularis has with 1 partner always dominant. An exception until recently been confined to the Palearctic re- to this was reported by Rickard and Zimmerman gion and New Zealand where it is considered to (1986) when O. kolchida was discovered in the be fairly common in cervids and less common absence of its major species, O. leptospicularis. in cattle. Common hosts include elk, Cervus ela- The recovery of O. leptospicularis and O. kol- phus (Jansen, 1960; Drozdz, 1966; Kutzer and chida during the present study represents the first Hinaidy, 1969; Dunn, 1983), moose, Alces alces report of O. leptospicularis, and the second of O. (Drozdz, 1966; Nilsson, 1971), sika deer, Cervus kolchida, from cattle in North America. The first nippon (Drozdz, 1966), fallow deer, Cervus datna report of O. kolchida from North America was (Swierstra et al., 1959; Drozdz, 1966), roe deer, by Rickard and Zimmerman (1986) in cattle from Capreolus capreolus (Swierstra et al., 1959; Dunn, Oregon. Freutel and Lankester (1989) reported 1965; Drozdz, 1966; Kutzer and Hinaidy, 1969; the recovery of O. leptospicularis from captive Nilsson, 1971; Andrews et al., 1974; Drozdz et caribou at the Kakabeka Falls Game Farm, Can- al., 1987), chamois, Rupricapra rupricapra ada, representing the first report from North America. Lichtenfels et al. (1988) listed O. lep- tospicularis from California cattle in a table of 1 Published as Oregon Agricultural Experiment Sta- tion Technical Paper No. 9377 Oregon State Univer- specimens studied, but we have learned (Lich- sity, Corvallis. tenfels, pers. comm.) that the item was a typo- Copyright © 2011, The Helminthological Society of Washington OF WASHINGTON, VOLUME 58, NUMBER 2, JULY 1991 261 Table 1. Intensity and prevalence of species of Oster- Table 2. Morphometrics of male specimens of Oster- tagia nematodes* recovered from Oregon calves (Bos tagia leptospicularis recovered from Oregon calves (Bos taurus). taurus). Mean number per Number infected host Prevalence (%) of speci- mens Species Control Treated Control Treated mea- Character sured Ranges (mean) in /^m O. ostertagi 5,620 4,187 100 100 O. lyrata 16 22 55 50 Body length 82 4,750-6,833(5,817) O. leptospicularis 98 88 73 75 Esophagus length 82 617-864 (779) O. kolchida 4 2 18 8 Esophagus width at base 78 27-59 (43) Esophageal-intestinal * Male specimens only. valve length 82 74-167 (118) Cervical papillae* 82 179-387 (298) Excretory pore* 82 154-370 (283) graphical error, and no specimens ofO. leptospic- Width of bodyt 79 67-163 (96) ularis from North American cattle were included Sub-ventral gland in that study. Since these reports, O. leptospic- orifices* 77 189-380 (296) Spicule length 79 137-195 (159) ularis has again been collected from cattle in Or- Trifurcation of spicule egon (Rickard, pers. comm.) and most recently tips* 77 97-147 (118) from Montana (Decker and Mulrooney, unpubl. Length of gubernaculum 70 13-48 (29) data). Width of gubernaculum 71 4-13 (7) Sjoberg's organ 82 absent During a routine anthelmintic efficacy trial, Bursal ray pattern § 82 2-1-2 several specimens of Ostertagia leptospicularis were recovered. The trial was conducted early in * Distance measured from anterior end. the summer of 1988 at Oregon State University. t Distance measured at pre-bursal papillae. t Distance measured from anterior end of spicules. Calves (Bos taurus) of mixed breed (less than 12 § Pattern following system of Durette-Desset (1983). months of age), harboring naturally acquired gas- trointestinal nematodes, were transported from the ranch of origin in Molalla, Oregon, to pas- chida for the nontreated group of animals. From tures located at the Berry Creek Beef Ranch of the group that received the medicated mineral the Oregon State University Department of An- mix, the mean values were 99.5% O. ostertagi: imal Science, Corvallis, Oregon. A total of 23 0.5% O. lyrata and 97.8% O. leptospicularis: animals was used for the study and was divided 2.2% O. kolchida. Of the polymorphic species into 2 groups (11 in the nontreated, control group pairs, O. leptospicularis and O. ostertagi are the and 12 in the treated group). The treated animals dominant species, whereas O. kolchida and O. were provided with free-choice medicated min- lyrata comprise the minor species, respectively. eral mix (morantel tartrate), while nonmedicated Morphological measurements of the specimens mineral mix was available free-choice for the identified as O. leptospicularis were taken from control animals. The quantity of mineral mix approximately 80 male specimens (Table 2) and consumed by each individual animal is un- compared very well to those reported by Lich- known. The 2 groups of animals were kept on tenfels et al. (1988). By ANOVA, no statistical separate pastures for a total of 63 days, then differences (P > 0.05) were observed in mea- necropsied for recovery and identification of gas- surements between the treated and control groups trointestinal nematodes present. of animals. Several specimens of O. leptospicu- Based on the identification of male nematode laris have been deposited with the United States specimens, 4 species of Ostertagia were identi- National Museum (USNM), Helminth Collec- fied: O. ostertagi, O. lyrata, O. kolchida, and O. tion Nos. 81033 and 81034. leptospicularis. Ostertagia leptospicularis was re- The mode of introduction and geographic dis- covered from 17 of the 23 cattle (8 nontreated, tribution of O. leptospicularis in domestic ru- control animals and 9 treated animals). Intensity minants in North America has yet to be deter- of Ostertagia species for each group of calves is mined. This species may have been: (1) present presented in Table 1. in North America but not previously recognized; The mean values for the ratios of polymorphic (2) brought into the United States recently with species pairs were 99.7% O. ostertagi:0.3% O. animals imported form an area where O. lepto- lyrata and 96.1% O. leptospicularis: 3.9% O. kol- spicularis is endemic; or (3) introduced by direct Copyright © 2011, The Helminthological Society of Washington 262 interchange of parasites between sylvatic and do- the yearly cycle. Acta Parasitologica Polonica 32: mestic hosts, being cervids and cattle in this case. 339-348. The range of origin in the present study is pop- Dunn, A. M. 1965. The gastro-intestinal helminths of wild ruminants in Britain. I. Roe deer, Capreo- ulated by black-tailed deer (Odocoileus hemio- lus capreolus capreolus. Parasitology 55:739-745. nis) and occasionally utilized by elk (Cervus ela- . 1983. Winter deaths in red deer: a prelimi- phus), which could account for direct interchange nary report on abomasal parasite burdens. Pub- of parasites between these sylvatic cervids and lications of the Veterinary Deer Society 1:17-25. Durette-Desset, M. C. 1983. Keys to genera of the cattle. The exchange of parasites between syl- superfamily Trichostrongyloidea. In R. C. Ander- vatic and domestic hosts has been previously son and A. G. Chabaud, eds. CIH Keys to the suggested by reports of the common deer para- Nematode Parasites of Vertebrates. No. 10. Com- sites Ostertagia kolchida (Rickard and Zimmer- monwealth Agricultural Bureaux, Farnham Royal, man, 1986) and Oesophagostomum venulosum England. Freutel, M., and M. W. Lankester. 1989. Gastroin- (Hoberg et al., 1988) in cattle from Oregon. testinal helminths of woodland and barren ground Ostertagia leptospicularis is considered to be caribou (Rangifer tarandus) in Canada, with keys highly pathogenic to cattle (Al Saqur et al., 1980, to species. Canadian Journal of Zoology 67:2253- 1982a, b, 1984; Bisset et al., 1984; Sulger Duel 2269. Hinaidy, H. K., V. C. Gutierres, and R. Supperer. et al., 1984) and could be considered as a poten- 1972.
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