Étude comparative du pouvoir pathogène expérimental de souches d’<i>Acanthamoeba</i>

Pernin, Pierre; Riany, A.

doi:10.1051/parasite/1980555491

Cited by 5 publications

(2 citation statements)

References 5 publications

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“…Amoebas were also found in tap-water (ANDERSON), in warm spring waters in England (Cam 1978) and various mineral waters (DESMET; DIVE 1978; DAVID). Numerous authors found amoebas in swimming pools with treated water (CERVA 1968;CERVOV~ 1972;KADLEC 1979KADLEC , 1980P O S P~~I L O V~;PERNIN 1978PERNIN , 1980CHANG; DESMET;DE JONCKHEERE 1979DIVE 1978;BROWN 1977;DERR-HARF;BIICHEL 1980;JANITSCHKE) DELATTRE 1981). A11 the amoebas isolated were very resistant against disinfectants and were demonstrated even in 0.5 .…”

Section: Introductionmentioning

confidence: 99%

Occurrence and Nutritional Relations of the Limax‐Amoebae Group in Bathing Pool Waters

Svorcová

1985

Acta hydrochim. hydrobiol.

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Szcmnmry : In 392 samples from 14 balneological therapeutic pools and two swimming pools with untreated and chlorinated water of 15 ... 30 "C the following species were found in 72 %of the samples (percentage of positive samples) : Acanthamoeba pdyphaga (10.5), A. castellani (3.7). Naegleriu gruberi (5.9), A' . lovaniensis (12.7), Vahlkampfia ustiniana (7.2), V . spec. (15.8), Hartmanella vermiforwis and H . exudans (i3.1), H . spec. (31.2). 47 0,b of the positive findings grew also a t 37 "C, 9 O,o of them also at 44 "c'. The average densities amounted t o between 27 and 777 ind./l. the maxima were between 66 and more than 1000 ind./l. Neither heterotrophic bacteria nor amoebas could be detected in 25 samples, in the other samples a significant regression exists between the number of amoebas per litre A and the number of bacteria N/ml of the form lg A =0.47 x lg N 1-1.22.Because of the danger of the occurrence of pathogenic amoebas, too, in the bathing pool waters, the analysis for amoebas is recommended to check the bathing water. As atemporary working level, the absence of amoebas in a sample of 100 ml is proposed.

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Section: Introductionmentioning

confidence: 99%

Occurrence and Nutritional Relations of the Limax‐Amoebae Group in Bathing Pool Waters

Svorcová

1985

Acta hydrochim. hydrobiol.

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“…Cette situation différencie le genre Naegleria du genre Acanthamoeba où la patho génicité est retrouvée chez de nombreuses souches appartenant à différentes espèces (De Jonckheere, 1980 ;Pernin et Riany, 1980). Cependant l'exclusivité du pouvoir pathogène de N. fowleri qui a prévalu pen dant plus de dix ans vient d'être remise en cause depuis la description récente par De Jonckheere (1981) d'une nouvelle espèce pathogène N. australiensis qui, bien que différente de N. fowleri, manifeste une virulence non négligeable.…”

Section: Introductionunclassified

Isolement et identification de deux nouvelles souches pathogènes de Naegleria a us traliensis

Pernin¹,

Jonckheere

1984

Ann. Parasitol. Hum. Comp.

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Nous rapportons l'isolement de deux souches de Naegleria pathogènes qui par l'ensemble de leurs caractères biologiques (thermotolérance, axénisation, pathogénicité), biochimiques (comparaison des zymogrammes) et antigéniques peuvent être identifiées à N. australiensis dont un seul exemplaire (souche type PP 397) était jusqu'à présent connu. La pathogénicité au sein de ce genre d'amibes libres ne constitue plus désormais un caractère exclusif de N. fowleri. Isolation and identification of two new pathogenic Naegleria australiensis strains. SUMMARY. We report here the isolation of two pathogenic Naegleria strains which by their biological (thermotolerance, axenisation, pathogenicity), biochemical (zymogram patterns), and antigenic characters can be identified as belonging to N. australiensis whereas only one strain (type species PP 397) was known until now. The pathogenicity among this genus of free-living amoebas is no more an exclusive feature of N. fowleri.

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Naegleria australiensis: experimental meningoencephalitis in mice

Jonckheere

Aerts

Martinez

1983

Transactions of the Royal Society of Tropical Medicine and Hygi

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Naegleria australiensis was recently described as a new species of free-living amoeba pathogenic for mice. Infections of human brain by the free-living amoebae N. fowleri and Acanthamoeba spp. are well known. We here describe the clinicopathological features of experimental infection of the central nervous system of mice by N. australiensis. Weanling mice were inoculated intranasally and intracerebrally. The involvement of the nasal mucosa, olfactory neuroepithelium and lobes, cerebrum and cerebellum was detected in haematoxylin-eosin stained paraffin-embedded sections. Amoebic trophozoites sparsely located throughout the central nervous system were shown better by the immunoperoxidase method. Cysts were not detected. The histopathological changes differ from those produced by N. fowleri, especially in the degree of severity. They may be confused with those caused by Acanthamoeba spp. which usually produced subacute and chronic encephalitis with a prolonged clinical course.

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Étude comparative du pouvoir pathogène expérimental de souches d’Acanthamoeba

Cited by 5 publications

References 5 publications

Occurrence and Nutritional Relations of the Limax‐Amoebae Group in Bathing Pool Waters

Occurrence and Nutritional Relations of the Limax‐Amoebae Group in Bathing Pool Waters

Isolement et identification de deux nouvelles souches pathogènes de Naegleria a us traliensis

Naegleria australiensis: experimental meningoencephalitis in mice

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