Growth of Neurotropic Viruses in Extraneural Tissues V. Survey of Tissues of Various Animal Species for Capacity to Support Multiplication of Poliomyelitis Virus in Vitro

1954 ◽  
Vol 94 (3) ◽  
pp. 273-283 ◽  
Author(s):  
C. A. Evans ◽  
V. C. Chambers ◽  
W. M. Smith ◽  
P. H. Byatt
Keyword(s):  
Animal Species ◽  
Poliomyelitis Virus ◽  
Neurotropic Viruses

Inhibition of Human and Animal Platelet Adhesiveness to Glass Bead Columns by Adenosine, Dipyridamole, Chlorpromazine and Acetylsalicylic Acid

1976 ◽  
Vol 36 (02) ◽  
pp. 401-410 ◽  
Author(s):  
Buichi Fujttani ◽  
Toshimichi Tsuboi ◽  
Kazuko Takeno ◽  
Kouichi Yoshida ◽  
Masanao Shimizu
Keyword(s):  
Guinea Pig ◽  
Acetylsalicylic Acid ◽  
Guinea Pigs ◽  
Glass Bead ◽  
Animal Species ◽  
Inhibitory Effect ◽  
Rabbit Platelet ◽  
Platelet Adhesiveness

SummaryThe differences among human, rabbit and guinea-pig platelet adhesiveness as for inhibitions by adenosine, dipyridamole, chlorpromazine and acetylsalicylic acid are described, and the influence of measurement conditions on platelet adhesiveness is also reported. Platelet adhesiveness of human and animal species decreased with an increase of heparin concentrations and an increase of flow rate of blood passing through a glass bead column. Human and rabbit platelet adhesiveness was inhibited in vitro by adenosine, dipyridamole and chlorpromazine, but not by acetylsalicylic acid. On the other hand, guinea-pig platelet adhesiveness was inhibited by the four drugs including acetylsalicylic acid. In in vivo study, adenosine, dipyridamole and chlorpromazine inhibited platelet adhesiveness in rabbits and guinea-pigs. Acetylsalicylic acid showed the inhibitory effect in guinea-pigs, but not in rabbits.

scholarly journals Current Status of Putative Animal Sources of SARS-CoV-2 Infection in Humans: Wildlife, Domestic Animals and Pets

2021 ◽  
Vol 9 (4) ◽  
pp. 868
Author(s):  
Max Maurin ◽  
Florence Fenollar ◽  
Oleg Mediannikov ◽  
Bernard Davoust ◽  
Christian Devaux ◽  
...  
Keyword(s):  
Animal Species ◽  
Biological Properties ◽  
Experimental Models ◽  
Current Data ◽  
The Body ◽  
Receptor Expression ◽  
Current Status ◽  
Susceptible Animal

SARS-CoV-2 is currently considered to have emerged from a bat coronavirus reservoir. However, the real natural cycle of this virus remains to be elucidated. Moreover, the COVID-19 pandemic has led to novel opportunities for SARS-CoV-2 transmission between humans and susceptible animal species. In silico and in vitro evaluation of the interactions between the SARS-CoV-2 spike protein and eucaryotic angiotensin-converting enzyme 2 (ACE2) receptor have tentatively predicted susceptibility to SARS-CoV-2 infection of several animal species. Although useful, these data do not always correlate with in vivo data obtained in experimental models or during natural infections. Other host biological properties may intervene such as the body temperature, level of receptor expression, co-receptor, restriction factors, and genetic background. The spread of SARS-CoV-2 also depends on the extent and duration of viral shedding in the infected host as well as population density and behaviour (group living and grooming). Overall, current data indicate that the most at-risk interactions between humans and animals for COVID-19 infection are those involving certain mustelids (such as minks and ferrets), rodents (such as hamsters), lagomorphs (especially rabbits), and felines (including cats). Therefore, special attention should be paid to the risk of SARS-CoV-2 infection associated with pets.

scholarly journals Associative Effects between Forages and Concentrates on In Vitro Fermentation of Working Equine Diets

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2212
Author(s):  
Mónica Gandarillas ◽  
Juan Pablo Keim ◽  
Elisa María Gapp
Keyword(s):  
High Performance ◽  
Volatile Fatty Acid ◽  
Animal Species ◽  
Nutritive Value ◽  
Gas Production ◽  
In Vitro Fermentation ◽  
In Vitro Gas Production ◽  
Production Experiment ◽  
Need To Evaluate

Background: Horses are hindgut fermenters, and it is therefore important to determine the postgastric nutritive value of their feedstuffs and diets. Moreover, it has been demonstrated in other animal species that the fermentation of diets results in different values than those expected from pure ingredients. Therefore, the general objective of this work is to evaluate the gas production (GP) and volatile fatty acid (VFA) concentration, as well as the associative effects, of mixtures of different forages and concentrated foods, which are representative of the traditional diets of high-performance horses. Methods: An in vitro gas production experiment was conducted to assess the fermentation of two forages and three concentrates that are typical in horse diets. The combination of 70% of forage and 30% concentrates was also assessed to determine potential associative effects. Results: Concentrates and grains produced higher GP and VFA than forages when evaluated alone. When experimental diets were incubated, GP parameters and VFA concentrations of forage–concentrate mixtures had unexpected differences from the values expected from the fermentation of pure ingredients, suggesting the occurrence of associative effects. Conclusions: Our results indicate that there is a need to evaluate the fermentation of diets, rather than predicting from the values of pure ingredients.

Oocytes from gilts of domestic pig (Sus scrofa domesticus) and wild boar (Sus scrofa) species exhibit similar developmental potential during in vitro maturation

1998 ◽  
Vol 1998 ◽  
pp. 178-178
Author(s):  
N.S. Prathalingam ◽  
K. Rust ◽  
M.E. Staines ◽  
G.J. McCallum ◽  
S.A. Edwards ◽  
...  
Keyword(s):  
Wild Boar ◽  
Sus Scrofa ◽  
In Vitro Maturation ◽  
Animal Species ◽  
Genetic Material ◽  
Developmental Potential ◽  
In Captivity ◽  
Breeding Programmes ◽  
Sus Scrofa Domesticus

In vitro embryo production strategies have been considered as possible means to protect wild and endangered animal species through assisted breeding programmes. They also offer the possibility to preserve genetic material from such stock or to facilitate breeding in captivity. The relevant technologies, however, have been developed to meet the needs of oocytes and embryos of domesticated animals and their suitability for wild species remains largely unknown. This study investigated the ability of in vitro maturation procedures, designed for oocytes of domestic pigs (Sus scrofa domesticus), to support the development of oocytes from wild boar (Sus scrofa)gilts.

STATEMENT BY COMMITTEE ON FETUS AND NEWBORN

PEDIATRICS ◽  
1961 ◽  
Vol 28 (4) ◽  
pp. 678-678
Author(s):  
Keyword(s):  
Dose Response ◽  
Animal Species ◽  
Older Children ◽  
Human Species ◽  
Basic Premise ◽  
Newborn Animal ◽  
Physical Size ◽  
Human Adults

IT IS A BASIC PREMISE of pediatrics that physical size is not the most important difference between children and adults. There is increasing awareness that it is also necessary to make more than a quantitative distinction between infants and children. The fetus and the newborn infant often behave so differently as to warrant consideration as separate categories of the human species. This necessitates re-evaluation of the effects of drugs independently in each category of the human so that they may be used safely. Existing drugs and agents that are developed in the future for use in the fetus and in infants must be subjected to more extensive preclinical investigation than is being carried out at the present time. The pharmacologic responses of the immature human may differ greatly both quantitatively and qualitatively from those of the adult. As a result, data obtained from tests in mature animals and human adults or older children cannot be accepted as a satisfactory basis for recommendations concerning the fetus and infant. The pharmacologic properties of drugs should be studied in vitro and in vivo in the fetus and newborn animal and compared with those in the adult of the same animal species. Of particular importance would be a knowledge of the LD50, dose response, metabolism, and distribution and disposition of the drug.

scholarly journals Interaction of Enteropathogenic and Shiga Toxin-Producing Escherichia coli and Porcine Intestinal Mucosa: Role of Intimin and Tir in Adherence

2005 ◽  
Vol 73 (9) ◽  
pp. 6005-6016 ◽  
Author(s):  
Francis Girard ◽  
Isabelle Batisson ◽  
Gad M. Frankel ◽  
Josée Harel ◽  
John M. Fairbrother
Keyword(s):  
Escherichia Coli ◽  
Shiga Toxin ◽  
Actin Polymerization ◽  
Animal Species ◽  
Ex Vivo ◽  
Epec Strain ◽  
E Coli ◽  
In Vitro Organ Culture

ABSTRACT The ileal in vitro organ culture (IVOC) model using tissues originating from colostrum-deprived newborn piglets has proven to be an effective way to study the attaching and effacing (A/E) phenotype of porcine enteropathogenic Escherichia coli (EPEC) ex vivo. The aim of this study was to investigate the role of intimin subtype and Tir in the adherence of EPEC and Shiga-toxin-producing E. coli (STEC), isolated from different animal species, to porcine intestinal IVOC. Moreover, the role of intimin in Tir-independent adherence of the human EPEC strain E2348/69 was investigated using intimin and Tir-deficient derivatives. Our results demonstrated that A/E E. coli strains (AEEC) from various animal species and humans induce the A/E phenotype in porcine ileal IVOC and that intimin subtype influences intestinal adherence and tropism of AEEC strains. We also showed that a tir mutant of EPEC strain E2348/69 demonstrates close adherence to the epithelial cells of porcine ileal IVOC segments, with microvillous effacement but with no evidence of actin polymerization or pedestal formation, and that intimin seems to be involved in this phenotype. Overall, this study provides further evidence for the existence of one or more host-cell-encoded intimin receptor(s) in the pig gut.

scholarly journals INTRADERMAL VERSUS SUBCUTANEOUS IMMUNIZATION OF MONKEYS AGAINST POLIOMYELITIS

1929 ◽  
Vol 49 (6) ◽  
pp. 959-973 ◽  
Author(s):  
F. W. Stewart ◽  
C. P. Rhoads
Keyword(s):  
Subcutaneous Injection ◽  
Subcutaneous Tissue ◽  
Poliomyelitis Virus ◽  
Intracerebral Inoculation ◽  
Degree Of Protection ◽  
Subcutaneous Immunization

1. The introduction of considerable amounts of living, active poliomyelitis virus into the skin and subcutaneous tissue of monkeys protects the animals against intracerebral inoculations of similar virus material. 2. The degree of protection conferred by intradermal is greater than by subcutaneous injection. 3. During intradermal and subcutaneous inoculations, no local or general pathological signs were observed. 4. The degree of protection produced by the immunization methods used is not absolute, since a percentage of the inoculated monkeys respond to intracerebral injections of highly potent virus. 5. The sera of the animals inoculated intradermally or subcutaneously neutralized poliomyelitis virus in vitro, irrespective of the result of intracerebral inoculation, in all except one instance. 6. The power of the serum of treated monkeys to neutralize virus in vitro is a more delicate test of immunity than is the intracerebral inoculation.

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