Table. 1.

Estimates and values for the transmission dynamics of community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) and hospital-acquired MRSA (HA-MRSA).

Variable	Symbol	Baseline value	Source
Total no. of patients	N	400	…
No. of admissions per day
Total	Λ	70	BI
Patients colonized with CA-MRSA	λCC	0.03	[19, 20 ]
Patients colonized with HA-MRSA	λCH	0.07	BI, [19, 20 ]
Patients infected with CA-MRSA	λIC	0.005	[11]
Patients infected with HA-MRSA	λIH	0.0017	[11]
Length of stay, by patient group
Susceptible patients	γS=1/5	5 days	BI
Patients colonized with CA-MRSA	γCC=1/5	5 days	BI
Patients colonized with HA-MRSA	γHC=1/7	7 days	[14]
Patients infected with CA-MRSA	γIC=1/10	10 days	[14]
Patients infected with HA-MRSA	γIH=1/18	18 days	[14]
Hand hygiene compliance efficacy, %	η	60	[21]
Transmission rate per susceptible patienta
Patients colonized with CA-MRSA   per patient colonized with CA-MRSA/N	βCC	0.36 per day	[22, 23]
Patients colonized with HA-MRSA per   patient colonized with HA-MRSA/N	βCH	0.27 per day	[22, 23]
Patients colonized with CA-MRSA per   patient infected with CA-MRSA/N	βIC	0.09 per day	[22, 23]
Patients colonized with HA-MRSA per   patient infected with HA-MRSA/N	βIH	0.07 per day	[22, 23]
Rate of infection per colonized patient per  day of length of stay, %
CA-MRSA	100 ϕC	10 γCC	[24]
HA-MRSA	100 ϕH	10 γCH	[24]
Death rate per infected patient per day of  length of stay, %
CA-MRSA	100 δC	3.3 γIC	[1, 25]
HA-MRSA	100 δH	20.0 γIH	[1, 25]
Infection cure rate per infected patient per  day of length of stay, %
CA-MRSA	100 τC	96.7 γIC	[1, 25]
HA-MRSA	100 τH	80.0 γIH	[1, 25]
Decolonization rate per colonized patient  per day of length of stay, %
CA-MRSA	100 αC	0 γCC	[26, 27]
HA-MRSA	100 αH	0 γCH

NOTE. BI, data obtained from the Beth Israel Deaconess Medical Center.

^aTransmission of MRSA from a colonized or infected patient to a susceptible patient with an assumption that hand hygiene compliance is 0%.