Download Free Medical Infectious Diseases of the Digestive System PowerPoint Presentation

Infectious Diseases of the Digestive System PowerPoint Presentation

DOWNLOAD MEDICAL POWERPOINT PRESENTATION

About This Presentation

Description : Check out this medical presentation on Digestive System, which is titled "Infectious Diseases of the Digestive System", to know about the infectious diseases of the digestive system.

Tags : Digestive System, Infectious Diseases, GI tract

Published on : Jul 10, 2021 | Views : 2422 | Downloads : 9

Shareable Url :

Embed Code :

Comment

Transcript

Slide 1-

Infectious Diseases of the Digestive System
Slide 2-

GI Tract
Slide 3-

U.S. Foodborne-Disease Outbreaks
Slide 4-

ppt slide no 4 content not found
Slide 5-

Typhoid Mary Human carrier (and reservoir) of Salmonella typhi
Slide 6-

Typhoid Fever and Salmonellosis
Slide 7-

Salmonella enterica serovars Infect domestic animals Eggs and contaminated meat One of the most prevalent causes of food-borne illnesses Transmission dose as few as 10 organisms Attachment is key virulence factor
Slide 8-

Salmonella enterica serovars. Gram negative bacillus Classification based on serology and phage susceptibility assays
Slide 9-

Salmonellosis 40,000 cases annually in US Invades intestinal epithelial cells Nausea, cramps, diarrhea Recovery in a few days but may shed organism for 6 months
Slide 10-

ppt slide no 10 content not found
Slide 11-

ppt slide no 11 content not found
Slide 12-

Campylobacter jejuni Small curved Gram negative rod Lives in large intestine of birds and mammals Fecal contamination of water and foods
Slide 13-

Campylobacteriosis Leading bacterial cause of human gastroenteritis in the world 2.4 million U.S. cases/year Undercooked poultry, shellfish, unpasteurized dairy products, contaminated water Waterybloody diarrhea Treated with antibiotics
Slide 14-

Rotavirus virus Primary cause of diarrhea morbidity and mortality 1 million cases per year; 70,000 hospitalizations Fecal-oral transmission Most serious in infants 6-24 months
Slide 15-

Hepatitis Inflammation of the liver Multiple viruses
Slide 16-

Hepatitis A Virus “Infectious” hepatitis Small RNA virus Transmitted by fecal-oral route New effective vaccine
Slide 17-

Hepatitis A in US
Slide 18-

Hepatitis A Worldwide
Slide 19-

Hepatitis B Virus “Serum” hepatitis Enveloped DNA virus Can result in chronic infection and liver cancer Recombinant vaccine
Slide 20-

ppt slide no 20 content not found
Slide 21-

Hepatitis C Virus “Serum” hepatitis More likely than HBV to become chronic Also causes liver cancer No vaccine
Slide 22-

Hepatitis C Treated with Interferon alpha and ribavirin No cure but slows liver damage
Slide 23-

Giardia lamblia Protozoan Cysts survive in environment Insensitive to chlorine Contaminated water source of infection
Slide 24-

Giardiasis Shed by wild animals into water supply as well as by infected humans G. lamblia attaches to human intestinal wall Diarrhea lasting for weeks Treated with anti-parasitic drugs
Slide 25-

HELMINTHES Flat worms and Round worms
Slide 26-

ppt slide no 26 content not found
Slide 27-

Hermaphroditic Flukes
Slide 28-

ppt slide no 28 content not found
Slide 29-

ppt slide no 29 content not found
Slide 30-

ppt slide no 30 content not found
Slide 31-

ppt slide no 31 content not found
Slide 32-

ppt slide no 32 content not found
Slide 33-

ppt slide no 33 content not found
Slide 34-

FLAT WORMS Phylum Platyhelminthes = Flat worms Class Cestoda = Tape worms Scolex contained in egg holdfast structure with hooks and suckers Proglottids major body of tapeworm contains both ovaries and testes = hermaphroditic Eggs can penetrate intestine of host and form hydatid cysts in tissues
Slide 35-

ppt slide no 35 content not found
Slide 36-

FIGURE 13-57 Taenia solium scolex (X64). The Taenia solium scolex has two rings of hooks and four suckers.
Slide 37-

ppt slide no 37 content not found
Slide 38-

ppt slide no 38 content not found
Slide 39-

ppt slide no 39 content not found
Slide 40-

ppt slide no 40 content not found
Slide 41-

ppt slide no 41 content not found
Slide 42-

ppt slide no 42 content not found
Slide 43-

Hookworms Ancylostoma duodenali and Necator americanus Old world and new world hookworms differ only in their geographic location. Human phase of this worm begins with a filaform larvae penetrating the skin, enters circulation, carried to the lungs, coughed up and swallowed, develops to adulthood in small intestine. Adult worms lay between 10,000 and 20,000 eggs per day. Daily blood loss 0.2ml/adult/day. Microcytic hypochromic anemia develops.
Slide 44-

ppt slide no 44 content not found
Slide 45-

Biblical worm Trichinella spiralis etiological agent of trichinosis. Infectious larva is present in the striated muscle of carnivorous and omnivorous mammals. Swine most common organism to transmit to humans. Encysted larvae live for many years. Polar bears and walruses are accounting for new human infestations in our Alaskan artic regions.
Slide 46-

ppt slide no 46 content not found
Slide 47-

FIGURE 13-68 Trichinella spiralis larva in skeletal muscle (W.M., X260). The spiral juvenile and its nurse cell are visible in this preparation.
Slide 48-

Pin worms or Seat worms Enterobius vermicularis most common helminthic infestation in America, 500 million cases annually globally second globally to Ascaris infestations. Eggs are ingested mainly fecal-oral.Egg laden dust can be inhaled. Autoinfection occurs frequently. “Scotch Tape Test” from perianal folds of diagnostic value.
Slide 49-

ppt slide no 49 content not found
Slide 50-

ppt slide no 50 content not found
Slide 51-

Ascaris Lumbricoides Large worms 25cm – 45cm in length. Most common helminth with over a billion infested a year. Prevalent in areas where sanitation is poor and human waste is used as fertilizer. Ingested egg releases a larva that penetrates the duodenal wall and carried to the liver and the heart, enters the pulmonary system, enters the alveoli where they molt and mature. They are coughed up, swallowed and returned to the small intestine. Adults can be passed out into the feces.
Slide 52-

ppt slide no 52 content not found
Slide 53-

ppt slide no 53 content not found
Slide 54-

ppt slide no 54 content not found
Slide 55-

Helminth Transmission Intestine --> environment --> ingested Examples: whipworm
Slide 56-

Helminth Transmission Intestine --> environment --> skin penetration Example: hookworms
Slide 57-

Helminth Transmission Intestine --> environment --> food animal muscle --> ingested Example: tapeworm
Slide 58-

Helminth Transmission Various organs --> environment --> ingestion or penetration Example: flukes
Slide 59-

Treatment of Inflammatory Bowel Disease with Worms? Pig whipworm causes transient, non-invasive, non-infective human disease Improved IBD symptoms