Notifiable Communicable Diseases
Incidences & Rates
Los Angeles County

By Year of Onset, 1995-2000

Number of Reported Cases Rates

Incident Rate of Reported Cases

Disease 2000 1999 1998 1997 1996 1995
Amebiasis 106 134 158 148 215 187
Botulism 0 4 3 3 4 2
Brucellosis 4 3 2 6 12 3
Campylobacteriosis 1,273 1,089 1,215 1,523 1,736 1,401
Cholera 0 0 2 0 0 2
Coccidioidomycosis 51 48 51 46 70 80
Cryptosporidiosis 74 71 94 77 149 211
Cysticercosis 36 27 23 34 33 26
Dengue 3 3 6 2 0 2
E. coli O157:H7 27 12 23 20 18 9
Encephalitis 46 39 46 34 33 59
Foodborne outbreaks 40 39 32 40 12 15
Giardiasis 499 592 678 770 971 940
Haemophilus influenzae type B 1 0 7 10 4 6
Hansen's Disease (Leprosy) 9 10 13 18 9 10
Disease 2000 1999 1998 1997 1996 1995
Hepatitis A 839 1,123 888 1,480 1,371 1,062
Hepatitis B 65 61 92 109 247 231
Hepatitis C 28 21 12 23 246 205
Hepatitis unspecified 11 9 10 16 28 22
Kawasaki syndrome 28 29 37 20 20 39
Legionellosis 14 16 20 32 12 16
Listeriosis, nonperinatal 19 21 24 14 30 26
Listeriosis, perinatal 8 12 7 8 5 10
Lyme disease 5 8 3 4 3 5
Malaria 43 62 50 55 62 76
Measles 5 1 3 4 2 7
Meningitis, viral 260 227 441 227 185 167
Meningococcal infections 53 49 50 74 59 52
Mumps 29 24 21 39 37 42
Pertussis 102 236 77 32 120 103
Psittacosis 0 1 0 1 0 0
Disease 2000 1999 1998 1997 1996 1995
Q-fever 1 0 1 0 0 0
Relapsing fever 0 1 0 0 0 0
Rheumatic fever, acute 1 1 0 1 2 1
Rubella 3 0 0 5 3 3
Salmonellosis 989 1,101 1,253 1,675 1,773 2,084
Shigellosis 832 669 783 848 1,130 1,747
Strongyloidiasis 1 7 9 4 11 17
Tetanus 0 2 1 4 1 4
Trichinosis 0 0 3 2 0 1
Tularemia 0 0 0 2 1 1
Typhoid fever, case 21 20 17 26 31 26
Typhoid fever, carrier 5 4 12 1 4 6
Typhus fever 17 6 7 13 16 11
Vibrio 18 3 31 28 23 12

Incident Rate of Reported Cases (per 100,000 Population)**

Disease 2000 1999 1998 1997 1996 1995
Amebiasis 1.15 1.46 1.74 1.64 2.42 2.14
Botulism - 0.04 0.03 0.03 0.05 0.02
Brucellosis 0.04 0.03 0.02 0.07 0.14 0.03
Campylobacteriosis 13.77 11.87 13.36 16.83 19.55 16.00
Cholera - - 0.02 - - 0.02
Coccidioidomycosis 0.55 0.52 0.56 0.51 0.79 0.91
Cryptosporidiosis 0.80 0.77 1.03 0.85 1.68 2.41
Cysticercosis 0.39 0.29 0.25 0.38 0.37 0.30
Dengue 0.03 0.03 0.07 0.02 - 0.02
E. coli O157:H7 0.29 0.13 0.25 0.22 0.20 0.10
Encephalitis 0.50 0.43 0.51 0.38 0.37 0.67
Giardiasis 5.40 6.45 7.45 8.51 10.93 10.74
Haemophilus influenzae type B 0.01 - 0.08 0.11 0.05 0.07
Hansen's disease (Leprosy) 0.10 0.11 0.14 0.20 0.10 0.11
Disease 2000 1999 1998 1997 1996 1995
Hepatitis A 9.07 12.24 9.76 16.35 14.99 12.13
Hepatitis B 0.70 0.67 1.01 1.20 2.78 2.64
Hepatitis C 0.30 0.23 0.13 0.25 2.77 2.34
Hepatitis unspecified 0.12 0.10 0.11 0.18 0.32 0.25
Kawasaki syndrome 0.30 0.32 0.41 0.22 0.23 0.45
Legionellosis 0.15 0.17 0.22 0.35 0.14 0.18
Listeriosis, nonperinatal 0.21 0.23 0.26 0.15 0.34 0.30
Listeriosis, perinatal * 5.54 7.69 4.19 5.02 3.19 5.81
Lyme disease 0.05 0.09 0.03 0.04 0.03 0.06
Malaria 0.47 0.68 0.55 0.61 0.70 0.87
Measles 0.05 0.01 0.03 0.04 0.02 0.08
Meningitis, viral 2.81 2.48 4.85 2.51 2.08 1.91
Meningococcal infections 0.57 0.53 0.55 0.82 0.66 0.59
Mumps 0.31 0.26 0.23 0.43 0.42 0.48
Pertussis 1.10 2.57 0.85 0.35 1.35 1.18
Psittacosis - 0.01 - 0.01 - -
Disease 2000 1999 1998 1997 1996 1995
Q-fever 0.01 - 0.01 - - -
Relapsing fever - 0.01 - - - -
Rheumatic fever, acute 0.01 0.01 - 0.01 0.02 0.01
Rubella 0.03 - - 0.06 0.03 0.03
Salmonellosis 10.70 12.00 13.77 18.51 19.97 23.81
Shigellosis 9.00 7.29 8.61 9.37 12.73 19.96
Strongyloidiasis 0.01 0.08 0.10 0.04 0.12 0.19
Tetanus - 0.02 0.01 0.04 0.01 0.05
Trichinosis - - 0.03 0.02 - 0.01
Tularemia - - - 0.02 0.01 0.01
Typhoid fever, case 0.23 0.22 0.19 0.29 0.35 0.30
Typhoid fever, carrier 0.05 0.04 0.13 0.01 0.05 0.07
Typhus fever 0.18 0.07 0.08 0.14 0.18 0.13
Vibrio 0.19 0.03 0.34 0.31 0.26 0.14

* Rates for perinatal listeriosis were calculated as cases per 100,000 live births.
** Rates of disease based on less than 19 cases or events are considered "unreliable." A zero rate made from no events is especially hazardous and are not reported here, except with a dash ("-").

Source: Los Angeles County Dept. of Health Services