Table 3.

Adult helminths found in gastrointestinal tract of Rattus norvegicus. N.A.: not applicable.

Parasite Species	N. Positive (%)	Host Male N° (%)	Host Female N°(%)	Total Number of Helminths	Mean Intensity	Range	Abundance	Parasite Sex Ratio
Nippostrongylus brasiliensis	24 (55.8%)	15 (55.5%)	9 (56.3%)	744	31	1–76	17.3	♂ 231 ♀ 513
Heligmosomoides polygyrus	1 (2.3%)	1 (3.7%)	/	13	13	5–8	0.3	♂ 8 ♀ 5
Heterakis spumosa	26 (60.5%)	16 (59.3%)	10 (62.5%)	666	25.6	1–94	15.5	♂ 288 ♀ 378
Syphacia muris	6 (14%)	4 (14.8%)	2 (12.5%)	58	9.7	1–28	1.3	♂ 7 ♀ 51
Aspiculuris tetraptera	2 (4.7%)	2 (7.4%)	/	20	9	1–12	0.4	♂ 14 ♀ 6
Eucoleus gastricus	1 (2.3%)	/	1 (6.3%)	4	4	0–4	0.1	♂ 0 ♀ 4
Hymenolepis diminuta	6 (14%)	5 (18.5%)	1 (6.3%)	N.A.	N.A.	N.A.	N.A.	N.A.