List of parasites of the marsh rice rat information
The lone star tick is one of the parasites that the marsh rice rat shares with other mammals.
A variety of parasites have been recorded from the marsh rice rat (Oryzomys palustris), a semiaquatic rodent found in the eastern and southern United States, north to New Jersey and Kansas and south to Florida and Texas, and in Tamaulipas, far northeastern Mexico.[1] Some of these parasites are endoparasites, internal parasites, while others are ectoparasites, external parasites.[2]
Parasitologist John Kinsella compared the endoparasites of marsh rice rats in a saltwater marsh at Cedar Key and a freshwater marsh at Paynes Prairie, both in Florida, in a 1988 study. He found a total of 45 species, a number unequaled in rodents.[3] This may be related to the diverse habitats the rice rat uses and to its omnivorous diet; it eats a variety of animals which may serve as intermediate hosts of various parasites. The endoparasites in the saltwater marsh were dominated by trematodes (flukes), and those of the freshwater marsh by nematodes (roundworms).[3] Endoparasites were found in the gastric mucosa (which lines the stomach), the cavity of the stomach, the small intestine, the cecum, the large intestine, the pancreatic duct, the bile ducts, the mucus of the liver, the pulmonary arteries, the abdominal cavity, and the pleural cavity.[4] While the marsh rice rat harbors a number of host-specific species,[5] such as the nematode Aonchotheca forresteri, other parasite species, such as the lone star tick (pictured), are shared with other mammals.[6] Compared to the hispid cotton rat (Sigmodon hispidus), Florida marsh rice rats usually harbor fewer individual ectoparasites of each species.[7]Borrelia, the bacterium that causes Lyme disease, has been identified in some ticks that infect the marsh rice rat and it has been identified as a possible natural reservoir for Borrelia.[8]
^Musser and Carleton, 2005, p. 1152; Wolfe, 1982, p. 1; Schmidt and Engstrom, 1994, p. 914
^Wolfe, 1982, p. 3; Whitaker and Hamilton, 1998, p. 281
^ abCite error: The named reference K278 was invoked but never defined (see the help page).
^Kinsella, 1988, table 1
^Kinsella, 1988, p. 275
^Kinsella, 1988, p. 279
^Worth, 1950, p. 334
^Sonenshine et al., 1993, p. 10; Levin et al., 1993, p. 12
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