Sharon Knapp

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Helminths and arthropods were collected and quantified from two black rhinoceroses (Diceros bicornis bicornis) and one white rhinoceros (Ceratotherium simum), and ticks from an additional four black and two white rhinoceroses in southern Africa. The helminths of a black rhinoceros from the Republic of South Africa and one from Namibia were quantitatively(More)
A collection of lymnaeid snails in Montana was made over a 3 year period, in conjunction with a state-wide survey of the distribution of liver flukes in Montana. Collection areas were selected based on reports of infected cattle, sheep or wildlife, and with the intent of covering all geographic regions of the state. Snails were found at all 97 of the(More)
The use of nucleic acid techniques in the diagnosis of parasitic infection has become increasingly widespread. An oligonucleotide probe derived from a rRNA sequence was developed for the detection of Fasciola hepatica in its intermediate snail host Pseudosuccinea columella. Total RNA obtained from whole adult liver flukes was used in a polymerase chain(More)
Fasciola hepatica, the common bile duct fluke, is an economically important parasite of domestic livestock. Current research interest is directed toward an understanding of the parasite's biology at the intermediate host level. To permit study of seasonal transmission patterns and parasite/intermediate host interactions, a fasciolid-specific assay has been(More)
Aquatic oligochaetes from a whirling disease enzootic area in southwest Montana were examined for infection with Myxobolus cerebralis. Anterior portions of oligochaetes were preserved for specific identification, whereas DNA was purified from posterior portions. The purified DNA was used in a nested polymerase chain reaction (PCR) assay specific for M.(More)
A survey of enteric coccidia was made in a Cashmere goat herd in Montana, USA. Eimerian oocysts were found in 97.2% of 616 fecal samples. Newly weaned wethers and does had higher oocyst counts than yearling wethers. Nine Eimeria species were identified, with Eimeria arloingi, Eimeria ninakohlyakimovae and Eimeria alijevi jointly comprising 88.3% of all(More)
Four Eimeria species have been reported from American bison (Bison bison): E. auburnensis, E. bovis, E. brasiliensis, and E. canadensis. We report on finding two additional species: E. ellipsoidalis and E. zuernii. In 1993, the prevalence of these six species in 31 yearling bison in a recently-established herd on private ranchland in Montana (USA) was: E.(More)