Parasitology Statistics London 1998
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TOTAL
                         
E. histolytica/dispar[1] 5 3   3   3   3 5 1     23
E. coli 13 7 11 16 20 9 15 22 15 32 8 10 178
E. hartmanni 8 3   2 2 1 2 7 7 5 3 3 43
E. polecki 26 13 11 21 22 13 17 32 27 38 11 13 244
E. nana 13 7 18 13 9 20 9 18 20 21 4 11 163
I. buetschlii         2     3   2   3 10
G. lamblia 11 10 11 24 24 10 13 15 13 18 14 11 174
D. fragilis 30 28 43 31 10 32 36 44 49 34 36 49 422
B. coli 41 38 54 55 34 42 49 59 62 52 50 60 596
C. mesnili 3 3 3     5 1 3   2 2 2 24
E. hominis               1         1
R. intestinalis                          
T. hominis                          
T. vaginalis                          
Unid. Flagellates[2]           2             2
C. parvum               1 2       3
C. cayetanensis           1             1
Microsporidium[3]                          
I. belli                          
S. hominis                          
                           
P. pubis[4]                          
P. humanus[5]                          
Hardbodied ticks[6]                          
S. scabei                          
Arthropods-other[7]                          
                           
A. lumbricoides                          
T. trichiura 3                 2     5
C. sinensis                     2   2
D. latum                          
E. vermicularis   1   1         1 1 1 2 7
Fasciola/Fasciolopsis                          
H. nana                 1       1
H. diminuta                          
Hookworm                          
S. mansoni                          
S. haematobium                          
S. japonicum                          
S. stercoralis         1               1
Taenia species 3 2     1               6
Trichostrongylus species                          
                           
Blastocystis hominis[8]     41 50 29 61 56 44 61 41 34 38 455
                           
Total Specimens[9] 932 853 808 1042 1013 1136 1193 1132 1127 1041 766[10] 661 11704
Total Positive Specimens 66 54 73 88 64 65 70 82 97 98 67 72 896
Percent Positive[11] 7.1 6.3 9.0 8.4 6.3 5.7 5.9 7.2 8.6 9.4 8.7 10.9 7.7
Recovery Rate - Percent[12] 16.7 13.5 18.7 15.9 12.3 12.1 11.9 18.4 17.9 20.0 17.1 24.8 16.3

[1]
Differentiation between E. histolytica and E. dispar not performed at this time.
[2]
Identification criteria based on finding typical flagellate trophozoite with no cyst form seen.
[3]
Enterocytozoon bieneusi
[4]
Includes  both nits and adults.
[5]
Includes both nits and adults.
[6]
Although Ixodes scapularis and other Lyme disease transmitting ticks are identified I. cookei and
D. variabilis are the most common.  For a complete explanation visit
http://www.practicalscience.com
[7]
Arthropods not listed may include various diptera, larva and fleas.
[8]
B. hominis is not counted in total specimens, total positive specimens or percent positive.
[9]
Including total O/Ps, total pinworm preparations and total arthropod and worm identifications.
[10]
November 1, 1998

OAML Guidelines for the collection of stool for O/P mailed.  This guideline reduces to 1 specimen from 3,  previously recommended.

[11]
Calculated at least quarterly.  Total number of positive specimens divided by the total number of specimens examined.  A ratio change of greater than 1.5 should be investigated.
[12]
Calculated at least quarterly.  Total parasite species identified divided by the total number of specimens examined.  A ratio change of 1.5 should be investigated.