The basic geohydrology of the Edwards aquifer in the Balcones fault zone is, by now, well understood and has been capably described by many authors, especially Arnow (1959), Abbott (1975), Maclay and Small (1984), and Senger and Kreitler (1984).ONCLUSIONS AND RECOMMENDATIONS. 1. There are two Edwards aquifers in Texas, one in the Edwards Plateau and the second in the Balcones fault zone area. Both are fractured, cavernous aquifers developed in carbonate rocks that were deposited in very shallow-marine shelf environments.
Casual Agent: The nematode (roundworm) Enterobius vermicularis (previously Oxyuris vermicularis) also called human pinworm. (Adult females: 8 to 13 mm, adult male: 2 to 5 mm. ) Humans are considered to be the only hosts of E. vermicularis. A second species, Enterobius gregorii, has been described and reported from Europe, Africa, and Asia.
Strongyloidiasis is an intestinal infection caused by 2 species of the parasitic nematode Strongyloides. The most common and clinically important pathogenic species in humans is S stercoralis (see the following image). S fuelleborni is found sporadically in Africa and Papua New Guinea.he life cycle of Strongyloides stercoralis is complex and unique among the intestinal nematodes. This worm has 2 types of life cyclesâa free-living life cycle (rhabditiform larvae) and a parasitic life cycle (filariform infective larvae)âwith 3 developmental stages: adult, rhabditiform larva, and filariform larva.