General Parasitology

Cards (32)

  • Proliferous parasite

    The parasite enters the body of the host as one individual and grows, multiples and eventually produces number of daughter individuals
  • Non-proliferous parasites

    The parasites enters the body of the host as one individual and grows likewise but the daughter individuals do not multiply in the host in whom they are born
  • Diagnosis
    • Stool Examination
    • Blood Examination
    • Urinalysis
    • Immunodiagnosis
    • Skin Biopsies
  • Treatment
    • Deworming
    • Selective treatment
    • Targeted treatment
    • Universal treatment
    • Drug resistance
  • Prevention Control

    • Morbidity control
    • Information-Education-Communication
    • Environmental management
    • Environmental sanitation
    • Sanitation
  • Common Body parts affected by parasites
    • Mucous membranes
    • Cecum
    • Rectum
    • Eyes
    • Esophagus
    • Skin
  • Patrick Manson
    In 1878, He discovered the role of mosquitoes in Filariasis
  • Laveran
    In 1880, he discovered Malarial Parasite
  • Sir Ronald Ross

    In 1897, he showed the transmission of Malaria by Mosquitoes
  • Importance of Parasitic Infections
    • Malaria > 300 Million cases & 2 Million Deaths
  • Parasite
    Organisms that infect other hosts
  • Parasitism
    An intimate association between parasite and living host, being physically an physiologically dependent on it.
  • Endoparasites
    • Parasites that live within the body of its host
    • Example: Protozoans and Helminths
  • Ectoparasites
    • Parasites that live outside the body of the host
    • Example: Lice
  • Obligate Parasite
    • Cannot exist without host
    • Example: Malarial Parasite
  • Facultative Parasite
    • Can exist independently
    • Example: N. Fowleri (brain-eating amoeba)
  • Accidental Parasite
    • Infection of unusual hosts
    • Example: E. granulosa (dog tapeworm) in humans
  • Definitive Host
    • Host that harbors adult parasite or where sexual multiplication occurs
  • Intermediate host
    • Where larval forms of parasite lives or where asexual multiplication occurs
  • Paratenic or Transport Host
    • Where parasite remains viable without development or multiplication
    • Human beings are definitive hosts for most parasitic infections
    • Except: Malaria, Toxoplasma gondi, E. granulosa
  • In parasites:
    • Protozoa are proliferous wherein the parasite enters the body of the host as one individual and grows, multiples and eventually produces number of daughter individuals. Daughters follow their mother's example and multiply.
    • Helminths are non-proliferous wherein the parasites enters the body of the host as one individual and grows likewise but the daughter individuals do not multiply in the host in whom they are born. They must get into another host before they can multiply.
  • Zoonotic Infections

    Acquired from animals
    • Human beings are accidental hosts
    • Example: Hydatid disease from dogs, Toxoplasmosis from cats
  • Zooanthroponosis
    Where man is not an incidental host, but an essential link in the life of a parasite like Pork tapeworm infection
  • Reservoir Hosts

    Vertebrate species that may act as a source of infection to man
  • Anthroponosis
    Parasitic infection is maintained in ma alone like Malaria and Filaria
  • Francisco Redi
    • Father of Modern Parasitology
    • He collected and described 108 different species of parasites
    • First published a book in parasite
  • Sources of Infection
    1. Soil - Roundworm, Hookworm
    2. Water - Infective cysts of Amebae, Giardia, Larvae of Schistosomes
    3. Food - Contamination with human/animal feces; Meat may contain infective larvae
    4. Insect Vectors - Mosquito (Malaria, Filaria), Sand Fly (Kala Azar) and House flu (Amoebiasis)
    5. Animal - Cow (Beef Tapeworm Infection) and Dog (Hydatid Disease)
    6. Self Infection - Finger to Mouth (pinworm infection)
  • Modes of Infection
    1. Oral Transmission - Roundworm
    2. Skin Penetration - Hookworm
    3. Vector - Malaria, Filaria
    4. Direct (person to person) - Congenital Toxoplasmosis
  • Course of Infection 

    From:
    1. Source
    2. Infection
    3. Incubation period
    4. Clinical Illness
  • Pathogenesis
    • The destruction of cells (Malaria parasite)
    • Trauma by hookworm
    • Migration of parasite by roundworm
    • Hypersensitivity or allergic reaction
    • by enzyme production (Amoebae)
  • Diagnosis
    • Stool Examination
    • Blood Examination
    • Urinalysis
    • Immunodiagnosis
    • Skin Biopsies