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Common Causes of Infectious Diseases

* = most common; please note this is not an exhaustive list and does not include all possible etiologies for a particular disease.

 Central Nervous System Infections

Bacterial meningitis

 Neonates (less than 1 month old)

Children and adults

Elderly (>60 yrs old)

Viral (aseptic) meningitis and encephalitis (90% of cases in patients under 30 years old)

Granulomatous Meningitis (Chronic meningitis)

Spinal cord

Skin (Integument) Infections

There are a huge number of infectious diseases of this the largest organ of the human anatomy. Therefore, only the more common bacterial, viral and fungal microbes are mentioned here.

Common Bacterial Infections.

Common Viral Infections.

Common Fungal Infections.

Ear Infections

Otitis Media

Otitis externa

Eye and Eyelid Infections

Anterior Blepharitis

Hordeola (stye)

Periorbital (Preseptal) Cellulitis

Orbital (Postseptal) Cellulitis

Dacryocystitis

Conjunctivitis

Keratitis

Respiratory Tract Infections

Acute Rhinosinusitis

Acute Bacterial Rhinosinusitis

Common cold (Rhinitis)

Pharyngitis

Viral Croup

Bacterial tracheitis

Epiglottitis

Bronchitis

Bronchiolitis

Pneumonia

Neonatal (0-1 month)

 

Infants (1-6 month)

Children (6month-5 year)

 

Children (5-15 year)

 

Young Adults (16-30 yr)

 

Older Adults

Gastrointestinal tract infections

Infections of the Teeth

Ludwig’s Angina

Infections of the Mouth and Tongue

Angular Cheilitis

Parotitis

Esophagitis- usually only seen in immunocompromised patients

Peptic Ulcer Disease

 

Intestinal Infections- Bacterial (can be inflammatory [blood and mucus small volume; fecal wbc's present] or noninflammatory [large volume watery stools; fecal wbc's NOT present]

Inflammatory ones

 

Non-inflammatory ones

 

Parasitic infections of the intestine

 

 

Viral Gastroenteritis

 

Food poisoning- intoxications

Viral Hepatitis- Infections of the Liver

Infections of the Bones and Joints

Osteomyelitis

Septic arthritis

Infections of the Heart

Pericarditis

Myocarditis

 

Endocarditis

 

·        Native valve- Streptococcus sp. (60-80%, viridans streptococci (30-40%), Streptococcus bovis (10%), Enterococci (S. faecalis and S. faecium; 5-18%) and Staphylococci (20-35%, usually Staphylococcus aureus)

·        Intravenous drug users- Staphylococcus aureus (50%) and gram-negative bacilli (15%; Pseudomonas aeruginosa is most the common gram-negative).

·        Prosthetic valve infections

Rheumatic Heart Disease

Hematopoietic/Lymphoreticular Infections

Infections of the Lymphocytes

Infections of the Phagocytic Cells

Infection of the Erythrocytes

Infection of the Endothelial Cells

Bacterial Sepsis

Neonates

Adults (Systemic Inflammatory Response Syndrome, Sepsis, Septic Shock)

Infections of the Genitourinary Tract

Cystitis and Pyelonephritis

Acute bacterial Prostatitis

Vaginitis

Sexually Transmitted Infections (STI’s) of the Genitourinary Tract

Genital Ulcerative Diseases

Urethritis

Cervicitis

Other STI’s

Acute Pelvic Inflammatory Disease

Genital Warts

Epididymitis

Ectoparasitic Infections

Scabies

Pediculosis

* = Most common; please note this is not an exhaustive list and does not include all possible etiologies for a particular disease.

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Revised 12/6/06