A spirochete found in the blood of a wild rat

1906 ◽  
Vol 4 (1) ◽  
pp. 125-127 ◽  
Author(s):  
W. J. MacNeal
Keyword(s):  
Wild Rat

scholarly journals Domestication and the Role of Social Play on the Development of Sociocognitive Skills in Rats

2019 ◽  
Vol 32 ◽  
Author(s):  
Sergio M. Pellis ◽  
Vivien C. Pellis ◽  
Brett T. Himmler ◽  
Klaudia Modlinska ◽  
Rafał Stryjek ◽  
...  
Keyword(s):  
Cognitive Skills ◽  
Strain Differences ◽  
Juvenile Period ◽  
Play Fighting ◽  
Play Interactions ◽  
Wild Rat ◽  
Rearing Condition ◽  
Wild Rats ◽  
Long Evans

Several studies on rats and hamsters, across multiple laboratories, have shown that limiting play in the juvenile period leads to adults that have physiological and anatomical changes in the medial prefrontal cortex (mPFC) and reduced socio-cognitive skills. Peers raised with playful peers have better socio-cognitive skills than animals raised with adult partners. Using Long Evans hooded rats - a commonly used domesticated strain - this relationship has been replicated multiple times. However, when the same paradigm was used with laboratory-reared wild rats, no differences were found between rats reared with peers and ones reared with adults. It has been shown that the key play-generated experiences involved are those related to actively wrestling with a partner and turn taking (as measured by role reversals), which give both partners opportunity to gain the advantage during play fighting. In the present study, we tested the hypothesis that wild rat adults provide juveniles more such experiences than do adult Long Evans rats. The asymmetry in the play interactions in adult-juveniles pairs was compared between the two strains. As predicted, wild rat adults initiated more play with the juveniles, wrestled more and provided more opportunities for role reversals. The findings thus support the hypotheses for the observed strain differences in the effects of rearing condition on the mPFC.

scholarly journals Inheritance of Scottish-type resistance to warfarin in the Norway rat

1976 ◽  
Vol 28 (3) ◽  
pp. 231-239 ◽  
Author(s):  
J. H. Greaves ◽  
P. B. Ayres
Keyword(s):  
Resistance Gene ◽  
Rattus Norvegicus ◽  
Major Gene ◽  
Inheritance Of Resistance ◽  
Response To Selection ◽  
Norway Rat ◽  
Group I ◽  
Wild Rat ◽  
In The Wild ◽  
Warfarin Resistance

SUMMARYThe inheritance of resistance to the rodenticide, warfarin, in the Norway rat, Rattus norvegicus, derived from a wild rat population in Scotland was studied in the backcross, intercross and testcross. The resistance was found to be due to a major gene with about the same map position in Linkage Group I as the warfarin-resistance gene, Rw2, which occurs in the wild rat population in Wales. In heterozygotes, the Scottish resistance gene, unlike the Welsh gene, is incompletely penetrant in expression, though the penetrance was found to increase markedly in response to selection. Differences between the Scottish and Welsh types of resistance suggest that the two resistance genes are allelic.

Genetic mapping of genes regulating the thymus size in back-cross rats between the laboratory BUF/Mna strain and the MITE strain derived from the wild rat,Rattus norvegicus

1997 ◽  
Vol 47 (7) ◽  
pp. 436-441 ◽  
Author(s):  
Nidhi Sharma ◽  
Atsushi Ohyabu ◽  
Yoshiki Murakumo ◽  
Masahide Takahashl ◽  
Mitsuhiro Saito ◽  
...  
Keyword(s):  
Genetic Mapping ◽  
Rattus Norvegicus ◽  
Back Cross ◽  
Wild Rat ◽  
Thymus Size

scholarly journals Leptospirosis: An Unusual Cause of ARDS

2010 ◽  
Vol 2010 ◽  
pp. 1-3 ◽  
Author(s):  
Marc Clavel ◽  
Gwenaelle Lhéritier ◽  
Nicolas Weinbreck ◽  
Antoine Guerlin ◽  
Anthony Dugard ◽  
...  
Keyword(s):  
Respiratory Failure ◽  
Lung Biopsy ◽  
Distress Syndrome ◽  
Multiple Organ ◽  
Open Lung Biopsy ◽  
Alveolar Haemorrhage ◽  
Massive Hemoptysis ◽  
Open Lung ◽  
Wild Rat ◽  
Severe Leptospirosis

Severe leptospirosis usually associates shock, jaundice, renal failure, and thrombocytopenia. Massive hemoptysis due to diffuse alveolar haemorrhage may rarely occur leading to an acute respiratory failure and multiple organ failure. We present the case of an acute respiratory distress syndrome caused by a severe leptospirosis. The severity of the respiratory failure contrasted with the absence of significant liver or renal dysfunction. Bedside open lung biopsy was only consistent with a postinfectious BOOP. The diagnosis was retrospective when the niece of the patient presented with similar inaugural symptoms ten days later after being scratched by a wild rat which was considered by our patient as a pet.

scholarly journals The wild rat as sentinel animal in the environmental risk assessment of asbestos pollution: A pilot study

2014 ◽  
Vol 479-480 ◽  
pp. 31-38 ◽  
Author(s):  
Michele Ardizzone ◽  
Carlotta Vizio ◽  
Elena Bozzetta ◽  
Marzia Pezzolato ◽  
Serena Meistro ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Pilot Study ◽  
Environmental Risk ◽  
Environmental Risk Assessment ◽  
Wild Rat ◽  
Sentinel Animal

Bronchus-associated lymphoid tissue (BALT) in the laboratory-bred and wild rat, Rattus norvegieus

1979 ◽  
Vol 13 (3) ◽  
pp. 239-244 ◽  
Author(s):  
R. L. Gregson ◽  
M. Jean Davey ◽  
D. E. Prentice
Keyword(s):  
Lymphoid Tissue ◽  
Direct Contact ◽  
Bronchial Lumen ◽  
Wild Rat ◽  
Wild Rats

Summary In juvenile wild rats, bronchus-associated lymphoid tissue (BALT) development was similar to that seen in adult specified-pathogen-free rats. In adult wild rats the BALT was widespread. In one animal infected with a mycoplasma-like organism, a region of bronchoepithelium overlying a large BALT nodule was seen, through which lymphocytes appeared able to pass to make direct contact with the bronchial lumen: the significance of this observation is discussed. There was no evidence of infection in lungs from any of the specified-pathogen-free animals, where small foci of BALT were seen.

EFFECTS OF HANTAVIRAL INFECTION ON SURVIVAL, GROWTH AND FERTILITY IN WILD RAT (RATTUS NORVEGICUS) POPULATIONS OF BALTIMORE, MARYLAND

1989 ◽  
Vol 25 (4) ◽  
pp. 469-476 ◽  
Author(s):  
James E. Childs ◽  
Gregory E. Glass ◽  
George W. Korch ◽  
James W. LeDuc
Keyword(s):  
Rattus Norvegicus ◽  
Wild Rat
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