Keys for Tropical Medicine 1

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2022年12月5日 (月) 17:08時点におけるVaccipedia.admin (トーク | 投稿記録)による版 (→‎Bacteria)
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Overview of Tropical Medicine

Definition of the tropics

  • Between the Tropic of Cancer (north latitude 23°26′) and the Tropic of Capricorn (south latitude 23°26′)
  • Covers 40% of land surfaces and 40% of population

Top 3 causes of death in LMICs, HICs and worldwide in 2016

*Bold names are communicable diseases

Worldwide LMICs HICs
  1. Ischemic heart disease
  2. Stroke
  3. Chronic obstructive pulmonary disease (COPD)
  1. Lower respiratory infections
  2. Diarrhea
  3. Ischemic heart disease
  1. Ischemic heart disease
  2. Stroke
  3. Alzheimer and other dementias

Changes of top 10 causes of death worldwide from 2010 to 2016

  • Tuberculosis ranked down to the 10th in 2016 from the 6th in 2010
  • HIV/AIDS ranked down out of 10 in 2016 from the 7th in 2010

List Neglected Tropical Diseases (NTDs) and what are not listed as NTDs

Virus
  1. Dengue & Chikungunya (dengue virus, chikungunya virus)
  2. Rabies (rabies virus)
Bacteria
  1. Buruli ulcer (Mycobacterium ulcerans)
  2. Leprosy (Mycobacterium leprosy)
  3. Trachoma (Chlamydia trachomatis)
  4. Yaws (Treponema pallidum pertenue)
Protozoa
  1. Chagas disease, American trypanosomiasis (Trypanosoma cruzi)
  2. Human African trypanosomyasis, Sleeping sickness (Trypanosoma brucei spp.)
  3. Leishmaniasis (cutaneous and visceral) (Leishmania spp.)
Parasites - Nematodes
  1. Dracunculiasis, Guinea worm (Dracunculus medinensis)
  2. Lymphatic filariasis (Wuchereria bancrofti, Brugia malayi)
  3. Onchocerciasis (Onchocerca volvulus)
  4. Soil-transmitted helminth infections
Parasites - Trematodes
  1. Foodborne trematode infections
  2. Schistosomiasis (Schistosoma spp.)
Parasites -
Cestodes
  1. Echinococcosis (Echinococcus granulosus, E. multilocularis)
  2. Taeniasis/Cysticercosis (Taenia spp.)
Ectoarasites
  1. Scabies, Tungiasis & other ectoparasites (mite, sandflea, etc.)
Fungi
  1. Mycetoma, Chromoblastomycosis (chromomycosis) & other deep mycoses (various spp.)
Non-communicable
  1. Snakebites
  • These are NOT listed as NTDs
    • HIV/AIDS
    • Tuberculosis
    • Malaria
    • Lower respiratory infections
    • Diarrhea

Bacteria

Biological basis of Gram staining

  • Bacteria have both of cell wall and cell membrane
    • Human and other animal cells have no cell wall
    • Plant cells have cell wall
  • Some bacteria have thick cell wall without outer membrane
  • Other bacteria have thin cell wall with outer membrane
  • Cell wall contains a layer of Peptidoglycan
 
  • Thick peptidoglycan layer catches and keep crystal violet with iodine
  • Outer membrane catches crystal violet with iodine but easily lose them by ethanol rinsing
 
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