Twenty-two cases of naturally occurring encephalitozoonosis in squirrel monkeys are reported from breeding colonies of the Delta Regional Primate Research Center, Covington, La. Characteristic foci of granulomatous inflammation and organisms were demonstrated in brains, kidneys, lungs, adrenals, and livers. Vasculitis and perivasculitis were also common lesions in several organs. At least seven cases were congenital while ten others occurred in monkeys less than nine months old. Granulomatous placentitis, previously unreported in any species due to Encephalitozoon cuniculi, was present in one monkey.
References
1.
AnverM. R.KingN. W.HuntR. D.:
Congenital encephalitozoonosis in a squirrel monkey (Saimiri sciureus).Vet Pathol9:
475–480,
1972
2.
AshtonN.WirasinhaP. A.:
Encephalitozoonosis (nosematosis) of the cornea.Br J Ophthalmol57:
669–674,
1973
BothaW. S.Van DellenA. F.StewartC. G.:
Canine encephalitozoonosis in South Africa.J S Afr Vet Assoc50:
135–144,
1979
5.
BrownR. J.HinkleD. K.TrevethanW. P.KupperJ. L.McKeeA. E.:
Nosematosis in a squirrel monkey (Saimiri sciureus).J Med Primatol2:
114–123,
1973
6.
BuyukmihciN.BellhornR. W.HunzikerJ.ClintonJ.:
Encephalitozoon (Nosema) infection of the cornea in a cat.J Am Vet Med Assoc171:
355–357,
1977
7.
CanningE. U.:
An unusually heavy natural infection of Nosema cuniculi in a laboratory rat.Trans R Soc Trop Med Hyg59:
371,
1965
8.
ColeJ. R.Jr.SangsterL. T.SulzerB. S.PursellB. S.EllinghausenH. C.:
Infections with Encephalitozoon cuniculi and Leptospira interrogans, serovars grippotyphosa and ballum, in a kennel of Foxhounds.J Am Vet Med Assoc180:
435–437,
1982
9.
CoxJ. C.GallichioH. A.:
Serological and histological studies on adult rabbits with recent, naturally acquired encephalitozoonosis.Res Vet Sci24:
260–261,
1978
10.
FlattR. E.JacksonS. J.:
Renal Nosematosis in young rabbits.Vet Pathol7:
492–497,
1970
11.
GannonJ.:
A survey of Encephalitozoon cuniculi in laboratory animal colonies in the United Kingdom.Lab Anim14:
91–94,
1980
12.
HayesK. C.WestmorelandN. P.FahertyT. P.:
An aortitis in the squirrel monkey and its effect on atherosclerosis.Exp Mol Pathol17:
334–347,
1972
InnesJ. R.ZemanW.FrenkelJ. K.BornerG.:
Occult endemic encephalitozoonosis of the central nervous system of mice (Swiss-Bagg-O'Grady strain).J Neuropathol Exp Neurol21:
519–533,
1962
15.
JungherrE.:
Encephalitozoon encephalomyelitis in a rabbit.J Am Vet Med Assoc127:
518,
1955
16.
KollerL. D.:
Spontaneous Nosema cuniculi infection in laboratory rabbits.J Am Vet Med Assoc155:
1108–1114,
1969
17.
MajeedS. K.ZubaidyA. J.:
Histopathological lesions associated with Encephalitozoon cuniculi (nosematosis) infection in a colony of Wistar rats.Lab Anim16:
244–247,
1982
18.
MalherbeH.MundayV.:
Encephalitozoon cuniculi infection of laboratory rabbits and mice in South Africa.J S Afr Vet Med Assoc29:
241–246,
1958
19.
MargilethA. M.StranoA. J.ChandraR.NeafieR.BlumM.McCullyR. M.:
Disseminated nosematosis in an immunologically compromised infant.Arch Pathol95:
145–150,
1973
20.
MatsubayashiH.KoikeT.MikataI.TakeiH.HagiwaraS.:
A case of Encephalitozoon-like body infection in man.Arch Pathol67:
181–187,
1959
MohnS. F.NordstogaK.:
Experimental encephalitozoonosis in the blue fox. Neonatal exposure to the parasite.Acta Vet Scand23:
344–360,
1982
23.
MohnS. F.NordstogaK.MollerO. M.:
Experimental encephalitozoonosis in the blue fox. Transplacental transmission of the parasite.Acta Vet Scand23:
211–220,
1982
24.
NelsonL. R.MackO. B.FlattR. E.:
Nosematosis in the shrew. Twentieth Annual Scientific Session,
American Association of Laboratory Animal Scientists,
1969
25.
PakesS. P.ShadduckJ. A.CaliA.:
Fine structure of Encephalitozoon cuniculi from rabbits, mice and hamsters.J Protozool22:
484–488,
1975
26.
PerrinT. L.:
Spontaneous and experimental encephalitozoon infection in laboratory animals.Arch Pathol36:
559–578,
1943
27.
PlowrightW.:
Probable Encephalitozoon infection of the dog.Vet Rec64:
381–383,
1952
SpragueV.:
Nosema connori n. sp., a microsporidian parasite of man.Trans Am Microsc Soc93:
400–403,
1974
30.
TaylorR. D.:
Modification of the Brown and Brenn gram stain for the differential staining of gram-positive and gram-negative bacteria in tissue sections.Am J Clin Path46:
472–474,
1966
31.
Van DellenA. F.BothaW. S.BoomkerJ.WarnesW. E.:
Light and electron microscopical studies on canine encephalitozoonosis: Cerebral vasculitis.Onderstepoort J Vet Res45:
165–186,
1978
32.
WilsonJ. M.:
The biology of Encephalitozoon cuniculi.Med Biol57:
84–101,
1979
