7 - chlamydia and chlamoydophila

Question 1

chlamydiaceae

Answer 1

tiny gram negatives with no peptidoglycan cell wall

obligate intracellulars

Question 2

chlamydiaceae gram stain

Answer 2

not seen - no peptidoglycan cell wall

also not responsive to beta lactic antibiotics

Question 3

chlamydiaceae growing conditions

Answer 3

○ Obligate intracellular parasites
§ Can only grow in living cells
§ Energy parasites - cannot produce their own energy but rely on hots cell’s energy producing apparatus
§ Will not grow on artificial media (eg. Agar plates)

Question 4

○ Chlamydia trachomatis causes

Answer 4

chlamydia,
trachoma,
lymphogranuloma venereum

Question 5

chlamydia

Answer 5

□ Worlds most commonly sexually transmitted disease

Question 6

chlamydia in males

Answer 6

® Urethritis
® Epididymitis
® Prostatitis

Question 7

chlamydia in females

Answer 7

® Urethritis
® Cervicitis
® Upper genital tract infection (PID - pelvic inflammatory disease)
® The latter is a major cause of infertility
® May be asymptomatic yet still lead to infertility

Question 8

trachoma

Answer 8

□ The worlds leading cause of blindness

Question 9

trachoma pathology

Answer 9

® Conjunctival follicles, inflammation
® Scarring and contraction
® Eyelashes turned in, damage to cornea
® Scarring of cornea and blindness

Question 10

LGV - lymphogranuloma venerum

Answer 10

□ A sexually transmitted disease of he tropics
® Northern australia
□ Increasingly seen as a cause of prostitis in male homosexuals

Question 11

lymphogranuloma centrum features

Answer 11

® Genital papule, ulcer
® Enlargement of inguinal lymoh nodes
® Inguinal inflammatory masses draining pus
® Chronic relapsing course
® Scarring and deformity of genitals and surrounding tissue
□ Elephantiasis may result from lymphatic damage

Question 12

chlamydia pneumoniae

Answer 12

§ A relatively recently discovered respiratory pathogen
§ Causes mainly lower respiratory tract infection
□ Highest incidence in the elderly

Question 13

chlamoydophila psittaci

Answer 13

§ This bacterium is a pathogen of psittacine birds (parrots) and other birds and mammals
§ Causes parrot fever - psittacosis or ornithosis

Question 14

chlamoydophila psittaci causes

Answer 14

parrot fever or psittacosis or ornithosis

Question 15

parrot fever symptoms

Answer 15

□ Nasal discharge 
				□ Breathing difficulty 
				□ Lethargy 
				□ Weight loss 
				□ Depression

Question 16

systemic symptoms of ornithosis

Answer 16

□ Abrupt onset of fever 
				□ Malaise 
				□ Myalgia 
				□ Dry cough 
				□ Pronounces headache 
				□ Sweats and rigors