Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Flagellates - Parasitic Protozoan
Several flagellate protozoa parasitise man and live in the blood stream or tissues of the reticulo-endothelial system. Most significant of these are the species of the genus Leishmania and Trypanosoma. They all require two hosts in their life cycle; a blood- sucking insect transmits the infective stage of the parasite to the vertebrate host. These protozoans are elongated slender or sometimes rounded possessing a single flagellum at the anterior end. In certain intracellular states the flagellum may be absent. The flagellum arises from a basal body or kinetosome at the floor of a flagellar pocket that occurs at the anterior or near the posterior extremity of the body. In close approximation to the basal body lies a spherical, rod or disc-shaped structure, the kinetoplast. The kinetoplast represents an enormous mitochondrion and contains DNA within it.
It has been suggested that the kinetoplast (or the mitochondria1 DNA) is a metabolic organelle which is essential for the survival of the parasite in the insect intermediate host but is not required for the life of trypanosomes in the vertebrate host's blood. Figure the fine structure of a trypanosome as seen under the electron microscope. Most blood forms are long and slender but as they become intracellular or are taken up by the insect vector, a modification in their form may occur. Accordingly, during the life cycle, a trypanosome may, exhibit several polymorphic forms.
Figure: Trypanosomid flagellates
a) The structure of trypanosoma bruceib) Life cycle of trypanosoma brucei gambiense causal agent of African sleeping sickness.The flagellate is transmitted by the bite of the tsetse fly. C) Swollen lymph glands where the parasite resides.
Patient is a 7-year-old girl who was brought to her physician by her mother with complaints of general fatigue, anorexia, and unexplained bruises and "rash" for the past 2 weeks. C
Substances which are insoluble in a membrane are carried across membrane with concentration gradient by means of a carrier molecule in a process termed as: a) Diffusion. b)
In some protozoans, food is always ingested at the same place on cell surface, cytostome (cell mouth). Undigested food is removed at a cytoproct, or cell anus. All of this is simil
What are plasmids? The Plasmids are circular DNA molecules present in the genetic material of some bacteria. They may perhaps contain genes responsible for bacterial resistance
Q. What about the fluid and other nutrient intake during constipation? The fluid intake should be at least 2 litres daily. This includes fluid as foods and beverage besides wa
a) Which vitamin helps to maintain resistance to infectious diseases? b) Name two foods which are a good source of this vitamin. a) Vitamin A (retinol) helps m
HEARIN G - Sound waves struck ear drum, it starts vibrations, these vibrations are carried to MIS → f. ovalis → S. vestibule → Hellicotrema → S. Tympani → f. rotundus → mi
Antibiotic resistance is the resistance conferred to the host the ability to survive a given antibiotic by the plasmids containing resistance genes. If such kind of plasmid is pre
Explain in detail about the Concomitant squint Concomitant squint is also called comitant squint. It means "I follow you", i.e., in all directions of gazes, the squinted eye fo
PLASM A - It is slightly alkaline non-living intercellular substance which constitutes about 60% part of the blood. It is a pale yellow but transparent and clear fluid.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd