Two Decapod Crustaceans, and , Stabilize Their Gaze Using Achromatic Visual Cues, but Not the Angle of Linearly Polarized Light.

Gaze stabilization is important to animals because it allows them to visually differentiate between their own motion relative to their environment and the motion of objects within their environment. Animals can struggle to stabilize their gaze in environments that have a high amount of visual noise. In shallow aquatic environments, such as tidal creeks, the motion of the water's surface can create dynamic spatiotemporal fluctuations in illumination referred to as "caustic flicker.

Blastocystis hominis: evidence for human pathogenicity and effectiveness of metronidazole therapy.

1. Clinical symptoms and oral treatment with metronidazole were studied in 103 patients with pure infections by Blastocystis hominis. 2.

Virulence of Entamoeba histolytica strains of human origin in Bombay to golden hamster.

The virulence following intrahepatic inoculation to hamsters with 17 strains of Entamoeba histolytica isolated in cultures from clinical cases of amoebiasis and from asymptomatic carriers has been investigated. All 10 strains from clinical cases and four from asymptomatic carriers were found to be virulent for hamster liver, producing moderate or high grade of hepatic lesions, whereas three strains from asymptomatic carriers were found to possess low virulence with production of low grade of liver lesions. The strains from clinical cases produced marked decrease in the weight of the infected animal which was associated with high mortality.

Virulence of entamoeba histolytica strains from Bombay (India) to rats.

The results of intracaecal inoculation experiments on young albino rats with different strains of E. histolytica isolated in cultures from patients with different varieties of clinical amoebiasis, such as acute amoebic dysentery, amoebic liver abscess and chronic amoebic colitis, as well as from asymptomatic infections, have been presented and discussed. Caecal scoring was performed with regard to the condition of the wall of the caecum and the contents of its lumen.