PHYSIOLOGICAL STUDIES ON PLANARIA

Physiological Studies on Trichomonas Vaginalis

Although many investigations into Trichomonas vaginalis Donne 1875 and vaginal trichomoniasis have been made since the organism was recognized again as a pathological entity by Hohne in 1916, problems on its pathogenicity, epidemiology and therapeutics are still left in confusion. One of the main reasons of this confusion appears that the bacteria free cultivation of this organism has not been ...

Physiological Studies on Candida albicans

Candida albicans is a polymorphic fungus that is capable of causing the life-threatening disease Candidiasis once it reaches the bloodstream of a susceptible host. One of the major virulence factors is its ability to switch from yeast to hyphal or pseudohyphal morphology. Yeast to hyphal transition is well studied and many environmental signals such as high temperature, alkaline pH, and presenc...

Population Growth in Planaria

Planaria reproduce by transverse fission. Isolated worms increase in number exponentially, while social animals at the same density are inhibited in terms of numerical increase, but over a 25 day period undergo a larger increase in mass. Isolated posterior fission products reproduce faster than isolated anterior fission products. Regulation of population growth is independent of density over a ...

Rheotaxis in Planaria Alpina

Early Physiological Studies on Elicitation of Hypersensitivity

It has now been nearly 40 years since the first observations by Klement (Klement, 1963) that resistance to bacterial plant pathogens was correlated with a rapid necrotic response induced in artificially inoculated tissue. This response, subsequently termed the hypersensitive response (HR) (Klement et al., 1964), was initially defined as a rapid necrosis observed within 24 h after inoculation of...