Citation:

Fournie, J., S. Foss, L. Courtney, AND A. Undeen. TESTING OF INSECT MICROSPORIDIAN (MICROSPORA: NOSEMATIDAE) IN NONTARGET AQUATIC SPECIES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/376 (NTIS PB91163899).

Description:

This paper reports results of single-species tests with the mosquito microsporidian Nosema algerae and the orthopteran microsporidian N. locustae on nontarget aquatic organisms. rganisms tested were the freshwater grass shrimp (Palaemonetes kadiakensis), the estuarine grass shrimp (P. pugio), the marine rotifer (Brachionus plicatilis), and the inland silverside (Menidia beryllina). hese organisms were exposed by intrahemocoelic injection, gavage, or ingestion. nfections did not develop in either the freshwater grass shrimp or estuarine grass shrimp that were gavaged with N. algerae spores. owever, infections did develop in both species of grass shrimp after intrahemocoelic injections with N. alaerae spores. nfected tissues included the gills, antennal gland, eyes, skeletal muscle, heart, and gonads. Proof of infection was demonstrated ultrastructurally by the presence of mature spores and developmental stages in infected tissues. nfections did not develop in P. pugio following intrahemocoelic injections of N. locustae spores. osema alaerae infections did not develop in the marine rotifer after ingestion of spores or in inland silversides fed marine rotifers containing ingested spores.

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