The Mechanism of Elimination of Certain Strains or Species of Trypanosomes When Mixed in Experimental Infections

1960 ◽  
Vol 46 (2) ◽  
pp. 129 ◽  
Author(s):  
Theodor von Brand ◽  
Eleanor Johnson Tobie
Keyword(s):  
Experimental Infections

THE DESCRIPTION AND LIFE CYCLE OF MARITREMA LARICOLA SP. N. (TREMATODA: MICROPHALLIDAE)

1963 ◽  
Vol 41 (5) ◽  
pp. 881-888 ◽  
Author(s):  
Hilda Lei Ching
Keyword(s):  
Life Cycle ◽  
Experimental Infections ◽  
Size And Morphology ◽  
Hemigrapsus Oregonensis ◽  
Larus Glaucescens

Maritrema laricola sp. n. from the intestine of the glaucous-winged gull, Larus glaucescens, differs from other species in the genus in having an elongate body, small cirrus sac, and short, curved cirrus. The life cycle of the species was followed from sporocyst stage in Littorina scutulata and Littorina sitchana, to the metacercarial stage in Hemigrapsus oregonensis and H. nudus, and to the adult in natural and experimental hosts. In experimental infections of H. oregonensis, the cercariae penetrate and develop in the gills after which they migrate to the haemocoel of the crab and encyst. The metacercariae are fully developed in from 6 to 9 weeks, and similar in size and morphology to natural infections in crabs. Excystment of the metacercariae occurs in the following cultures at 40 °C: 3% pepsin plus 1% HCl, 0.85% saline, and seawater diluted 1:4. Metacercariae live for about 3 days in diluted seawater but do not produce eggs in any of the cultures. Only immature worms were recovered from mice and newly hatched chicks when they were fed the metacercariae, but mature worms were found in natural and experimental infections of the glaucous-winged gull. In a review of the genus Maritrema, the following transfers are made: Maritrema uca Sarkisian, 1957 to the genus Mecynophallus Cable, Connor, and Balling, 1960, and Maritreminoides raminellae Dery, 1958 to Pseudospelotrema Yamaguti, 1939.

Effects of experimental infections with different doses of Anguillicola crassus (Nematoda, Dracunculoidea) on European eel (Anguilla anguilla)

Aquaculture ◽  
1996 ◽  
Vol 141 (1-2) ◽  
pp. 41-57 ◽  
Author(s):  
O.L.M. Haenen ◽  
T.A.M. van Wijngaarden ◽  
M.H.T. van der Heijden ◽  
J. Höglund ◽  
J.B.J.W. Cornelissen ◽  
...  
Keyword(s):  
Anguilla Anguilla ◽  
European Eel ◽  
Experimental Infections ◽  
Anguillicola Crassus ◽  
Different Doses

Experimental Infections with Mycobacterium intracellulare

1981 ◽  
Vol 3 (5) ◽  
pp. 973-978 ◽  
Author(s):  
P. R. Gangadharam ◽  
P. F. Pratt ◽  
P. T. Davidson
Keyword(s):  
Mycobacterium Intracellulare ◽  
Experimental Infections

scholarly journals INFLUENCE OF ANESTHESIA ON EXPERIMENTAL NEUROTROPIC VIRUS INFECTIONS

1946 ◽  
Vol 84 (4) ◽  
pp. 277-292 ◽  
Author(s):  
S. Edward Sulkin ◽  
Christine Zarafonetis ◽  
Andres Goth
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Diethyl Ether ◽  
Cervical Region ◽  
Virus Infections ◽  
Ether Anesthesia ◽  
Neurotropic Virus ◽  
Experimental Infections

Anesthesia with diethyl ether significantly alters the course and outcome of experimental infections with the equine encephalomyelitis virus (Eastern or Western type) or with the St. Louis encephalitis virus. No comparable effect is observed in experimental infections produced with rabies or poliomyelitis (Lansing) viruses. The neurotropic virus infections altered by ether anesthesia are those caused by viruses which are destroyed in vitro by this anesthetic, and those infections not affected by ether anesthesia are caused by viruses which apparently are not destroyed by ether in vitro. Another striking difference between these two groups of viruses is their pathogenesis in the animal host; those which are inhibited in vivo by ether anesthesia tend to infect cells of the cortex, basal ganglia, and only occasionally the cervical region of the cord. On the other hand, those which are not inhibited in vivo by ether anesthesia tend to involve cells of the lower central nervous system and in the case of rabies, peripheral nerves. This difference is of considerable importance in view of the fact that anesthetics affect cells of the lower central nervous system only in very high concentrations. It is obvious from the complexity of the problem that no clear-cut statement can be made at this point as to the mechanism of the observed effect of ether anesthesia in reducing the mortality rate in certain of the experimental neurotropic virus infections. Important possibilities include a direct specific effect of diethyl ether upon the virus and a less direct effect of the anesthetic upon the virus through its alteration of the metabolism of the host cell.

scholarly journals Neospora caninuminfection in birds: experimental infections in chicken and embryonated eggs

Parasitology ◽  
2007 ◽  
Vol 134 (14) ◽  
pp. 1931-1939 ◽  
Author(s):  
P. I. FURUTA ◽  
T. W. P. MINEO ◽  
A. O. T. CARRASCO ◽  
G. S. GODOY ◽  
A. A. PINTO ◽  
...  
Keyword(s):  
Laying Hens ◽  
Neospora Caninum ◽  
Parasite Burden ◽  
Asymptomatic Infection ◽  
Igg Antibodies ◽  
Intermediate Hosts ◽  
Susceptibility To Infection ◽  
Experimental Infections ◽  
Inoculum Dose ◽  
Specific Igg

SUMMARYNeospora caninumcauses economical impact in cattle-raising farms since it is implicated as the major cause of bovine abortions. Although infection by the parasite has been widely described in mammals, the role of birds in its life-cycle is still obscure. Therefore, this work aimed to evaluate the infection byN. caninumin different chicken models. Experimental infections were conducted in 7-day-old chicks, laying hens and embryonated eggs, where samples were analysed for parasite burden, IgG antibodies and lesions promoted. Chickens demonstrated an asymptomatic infection, although with seroconversion and systemic replication of the parasite. In laying hens, no signs of vertical transmission were observed. However, embryonated eggs inoculated by the allantoic cavity route demonstrated susceptibility to infection, with mortality rates around 50% independent of the inoculum dose. Additionally, dogs became infected after ingestion of different amounts of inoculated eggs, producing either oocysts or specific IgG antibodies. The results herein presented demonstrate that chickens may be intermediate hosts ofN. caninumand that embryonated eggs could be a useful model to study the parasite's biology.

EFFICACY OF TIGECYCLINE SINGLE OR IN COMBINATION FOR EXPERIMENTAL INFECTIONS BY KPC CARBAPENEMASE-PRODUCING KLEBSIELLA PNEUMONIAE

2021 ◽  
pp. 106384
Author(s):  
Sotiria Fergadaki ◽  
Georgios Renieris ◽  
Nikolaos Machairas ◽  
Labros Sabracos ◽  
Dionyssia-Irene Droggiti ◽  
...  
Keyword(s):  
Klebsiella Pneumoniae ◽  
Experimental Infections

scholarly journals Antimicrobial activity of MDL 62,873, a semisynthetic derivative of teicoplanin, in vitro and in experimental infections.

1992 ◽  
Vol 36 (2) ◽  
pp. 446-452 ◽  
Author(s):  
M Berti ◽  
G Candiani ◽  
M Borgonovi ◽  
P Landini ◽  
F Ripamonti ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Experimental Infections ◽  
Semisynthetic Derivative

Canine histoplasmosis in Rio de Janeiro: natural and experimental infections

1987 ◽  
Vol 25 (5) ◽  
pp. 319-322 ◽  
Author(s):  
V.L. Silva-Ribeiro ◽  
M.F. Ferreira-Da-Cruz ◽  
B. Wanke ◽  
B. Galvão-Castro
Keyword(s):  
Rio De Janeiro ◽  
Experimental Infections
Sign in / Sign up

Export Citation Format

Share Document