Coccidial parasites of the genus Isospora cause intestinal disease in several mammalian host species. These protozoal parasites have asexual and sexual stages within intestinal cells of their hosts and produce an environmentally resistant cyst stage, the oocyst. Infections are acquired by the ingestion of infective (sporulated) oocysts in contaminated food or water. Some species of mammalian Is...

CAWTHORN, R . J., and R. C. ANDERSON. 1976. Development of Physaloptera maxillaris (Nematoda: Physalopteroidea) in skunk (Mephitis mephitis) and the role of paratenic and other hosts in its life cycle. Can. J. Zool. 54: 313-323. The development of Physaloptera maxillaris in skunk (Mephitis mephitis) was examined. The third moult was first observed at 5 days after infection and the fourth at 10 ...

To the Editor. Alariosis is a re-emerging zoonotic disease caused by infection with larval stages of trema-todes of the genus Alaria. The trema-todes are found in wildlife that inhabit wetlands, and these animals may serve as possible reservoirs for these organisms that cause human infection (1). The main sources for human infection are suids and frogs (1). In humans, the clinical features of a...

Absctract Eustrongylides spp. nematodes have birds as final hosts and uses other vertebrates as intermediate/paratenic host (fish, amphibians and reptiles) and have zoonotic potential. In amphibians, the larvae may be located in the subcutaneous tissues, liver and mesentery, between the muscle fibres, especially in the lower limbs. Rhinella marina, which is widely observed in Brazil, has exhibi...

Toxocara cati is a common feline parasite transmitted by the ingestion of embryonated eggs, by the transmammary route or by predation of paratenic hosts harbouring third-stage larvae in their bodies. In the present study, the larval distribution of T. cati in tissues and organs of Rattus norvegicus experimentally infected with 300 embryonated eggs was analysed. Third-stage larvae were recovered...

Mongolian gerbils and Wistar rats were inoculated orally with 240 and 2,500 Toxocara cati embryonated eggs, respectively, to evaluate the larval recovery in different tissues and organs, such as the liver, lungs, heart, kidney, and skeletal muscles after 5, 30, 49, 70, and 92 days post-infection (PI). Larval recovery rates were 1.7-30.0% in Mongolian gerbils on days 5-92 PI and 0.2-3.8% in rats...

The present study aimed to describe the infective larval stage of Physaloptera sp. parasitizing Leptodactylus macrosternum and microscopic lesions these larvae in stomach wall. Forty-five specimens L. were collected during rainy season May 2018, municipality Petrolina, sub-middle São Francisco region, state Pernambuco, Brazil. Twenty-seven (L3) attached mucosa 11 (24.4%) macrosternum. No other ...