Spontaneous Frenkelia Infection in a Laboratory-Reared Rat

Tubular mechanism for the spontaneous hypercalciuria in laboratory rat.

Recently it has been observed that Ca excretion in laboratory rats does not follow a Gaussian distribution, with approximately 10% of them excreting Ca at a rate of 2 SD above the group mean. This phenomenon has been described as spontaneous hypercalciuria (SH). Our studies were designed to define its mechanism. 48 Wistar rats were subjected to metabolic studies to identify SH, prospectively de...

Frenkelia microti infection in a chinchilla (Chinchilla laniger) in the United States.

A Frenkelia microti tissue cyst was found in the brain of a chinchilla (Chinchilla laniger) used for biomedical research. This is the first report of Frenkelia infection in this animal in the United States.

Spontaneously induced rhythm of tidal periodicity in laboratory-reared Carcinus.

There is growing opinion that circadian rhythms have an inherent natural period approximating to that of environmental variables which, in field conditions, maintain exact period and appropriate phase (Pittendrigh, 1958, i960; Cloudsley-Thompson, 1961; Harker, 1964). Evidence supporting this view comes from the results of several workers (Harker, 1953; Pittendrigh, 1954; Aschoff & Meyer-Lohmann...

Survey of live laboratory animals reared in Japan (2009).

A survey on the number of live laboratory animals reared in research institutions, including universities, biomedical institutes, testing laboratories, pharmaceutical companies, and animal breeders, was conducted on June 1, 2009. One thousand seventy-four replies were recovered from 1,593 institutions, and 471 of them had used live laboratory animals from June 1, 2008 to May 31, 2009. A total o...

Absence of social recognition in laboratory-reared cuttlefish,