14) Immunology
Costa et al. (1995) studied the delayed hypersensitivity reaction to paracoccidioidin in captive arboreal vs. terrestrial animals of Brazil ; they found the former to have a much lower reactivity (22 vs. 83%).
15) Pathological features
Reppas et al. (2001) described two coatimundis with what were interpreted to be bilateral pheochromocytomas. Infectious diseases are important problems for coatis. Thus, Lainson & Shaw (197905) reported fatal pneumocystis infection and, later (1979), they identified organisms similar to Trypanosoma cruzi (the cause of Chagas' disease) in coatis and considered this as a possible health hazard for humans. Trypanosoma evansi, the cause of an important equine disease in Brazil, was isolated from coatis by Quiroz et al. (2000) An experimental study of infecting coatis with this agent led to severe anemia, myocarditis and encephalitis (Herrera et al., 2002). Griner (1983) found tuberculosis (Mycobacterium tuberculosis) in two animals at the San Diego Zoo. This led to the euthanasia of the remainder of animals in the colony which disclosed only dermatitis and mite infection.
Numerous infectious and parasitic afflictions have been described for this species. Thus, Schmidt (1977) identified Onicola luehei in animals from Paraguay; Trypanosoma cruzi-like organisms were identified by Lainson et al. (1979) in Brazilian animals; Trypanosoma evansi was isolated from coatis by Quieroz et al. (2000) and the course of infection followed after experimental transmission (Herrera et al. (2002); Leptospira were isolated from kidneys of Nasua by Lins & Lopes (1984); Toxocara cancrivorus was found by Sprent (1982); Valenzuela et al. (2000) described an epizootic of mange (due to Notoedres cati) in Mexico; Salgado-Maldonado & Cruz-Reyes (2002) found the acantocephalan Porrorchis nickoli also in Mexican animals; fatal infection with Pneumocystis carinii in a freshly-caught coati from the Amazonas; Baird & Neafie (1988) refer to infection with Brugia guyanensis a nematode from South America; over 80% of Brazilian coatis tested positive in an epidemiological study of histoplasmosis, and 65% for antigens of sporotrichosis; Leishmania shawi was found in coatis from Brazil by Lainson et al. (1989) who subsequently studied the possible origin of this infection in patients (Shaw et al., 1991); the animal described here had died from cryptosporidiosis, and Jatobal virus was isolated from a coati in Brazil.
Chittick et al. (2001) described pyometra and an endometrial carcinoma in a coati that had been implanted with melengestrol acetate for 4.5 years.
16) Physiologic data
Boggs & Irvine (1992) studied the respiratory mechanics of coatimundis and found them to be significantly different from the breathing patterns of woodchucks in that the coati had a larger tidal volume. Grant et al. (1976) had earlier made systematic studies of the regulation of pulmonary blood flow. Brimhall et al. (1979) as well as Ahmed et al. (1990) studied hemoglobin composition of coatis, mink and hyenas, while Urashima et al. (1999) examined the milk saccharides of coatis and identified two novel pentasaccharides. McClearn (1985) studied the fiber length of skeletal muscle fibers of distal arm and leg muscles in coatis and compared them with those of the raccoon. The coati is primarily diurnal, while the activity of kinkajou and raccoon occur mainly at night. For that reason, Jacobs & Deegan (1992) studied their retinal pigment and found that the nocturnal species were monochromatic, while the coati was dichromatic.
17) Other resources
Cell strains of a number of Coatimundis can be made available from CRES at San Diego Zoo by contacting Dr. Oliver Ryder at oryder@ucsd.edu.
18) Other remarks - What additional Information is needed?
There have been no descriptions of early stages of coati placentation; they are badly needed. Likewise, a better description of allantois and length of umbilical cord are needed. There are no endocrine studies, despite the relative wide distribution of the species in the Americas and in zoos.
Acknowledgement
The animal photograph in this chapter comes from the Zoological Society of San Diego
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