Microbiology

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BIOL 2267: Medical Microbiology Ch. 21-23 Informational tables

Complete the informational tables on Ch. 21, 22, and 23 by summarizing information in your own words. Keep in mind that some diseases may have more than one pathogen, method of transmission, portal of entry, etc. The first disease(s) in each chapter table have been completed as worked examples. Some diseases include bolded items within the tables that should be included in your completed table specifically, along with other information required from the table columns. Use these informational tables when completing your case study assignments (separate posting in D2L Brightspace). Submit to the D2L Assignment folder by Monday, December 4, 11:59 pm as a Word document (.docx) or PDF (.pdf).

Ch. 21 Microbial diseases of the skin and eyes

Diseases

Pathogen

Portal of Entry

Symptoms

Method of Transmission

Complications, prevention, other notable info

Impetigo

Staphylococcus aureus most common, Streptococcus pyogenes less common.

Parenteral (break/abrasion in skin)

-pustules that rupture, become crusted (light “honey” color crusts typical)

-direct contact (highly contagious, ages 2-5 years most affected)

-indirect contact transmission (such as via clothing, bed linens, toys)

-usually none (no scarring, generally heal without treatment)

Scalded skin syndrome

Staphylococcus aureus most common, Streptococcus pyogenes less common.

Parenteral (break/abrasion in skin)

-blisters, separation of skin layers due to toxins

-direct contact (highly contagious, ages 2-5 years most affected)

-fluid regulation problems, subsequent infection of deeper tissues

-toxins causing symptoms, 2 types:

1. toxin A- localized, bullous impetigo 2. toxin B- circulates, scalded skin syndrome

Toxic shock syndrome

Staphylococcus aureus most common, Streptococcus pyogenes less common.

-parenteral (examples: surgical incisions, injury related to childbirth)

-fever, vomiting, sun-burn rash, can progress to shock, organ failure

- direct contact (highly contagious, ages 2-5 years most affected)

-organ failure, death

Necrotizing fasciitis

Role of pyrogenic toxins:

Diseases

Pathogen

Portal of Entry

Symptoms

Method of Transmission

Complications, prevention, other notable info

Measles

Define macular rash:

Rubella

Chickenpox (varicella)

Shingles

Define vesicles:

Ch. 22 Microbial diseases of the nervous system

Diseases

Pathogen

Portal of Entry

Symptoms

Method of Transmission

Prevention & notable complications:

Haemophilus influenza meningitis

Haemophilus influenza bacteria ( Hib)

most commonly respiratory mucous membrane (m/o can be normal throat flora)

-initial “triad” of illness: fever, headache, stiff neck

-nausea & vomiting

-may progress to convulsions, coma

-direct person to person

-droplet

-Hib vaccine

Meningococcal meningitis

Pneumococcal meningitis

Tetanus

Botulism

Compare incidence in acidic vs. low acid foods:

Polio

Compare IPV to OPV:

Ch. 23 Microbial diseases of the cardiovascular and lymphatic systems

Diseases

Pathogen

Signs & symptoms

Reservoir

Method of Transmission

Complications, prevention, other notable info

Sepsis: Gram-negative

Gram-negative bacteria

-fever, chills, accelerated breathing & heart rate

-lymphangitis (inflamed walls of blood vessels visible as red streaks on skin)

-shock

-can vary, often human reservoir

-varies depending on source of infection; may be direct or indirect contact, vehicle transmission (such as through water)

-due to endotoxin LPS when gram-negative bacteria cells lyse

-progression to lethal stage of disease is rapid

-antibiotics can aggravate the condition

Sepsis:

Gram-positive

Endocarditis

Subacute bacterial

Acute bacterial

Why tooth extractions or tonsillectomy is notable:

Rheumatic fever

Connection to strep throat:

Infectious mononucleosis

Why are young adults more likely to show symptoms?

Plague

Lyme disease

How long does the tick need to be attached to transfer bacteria?