Lim, Justin Vincent A. and Vallester, Hyacinth B. (2011) Detection of Blastocystis hominis in sewage waters of selected areas in Dasmariñas City, Cavite, Philippines. Undergraduate thesis, De La Salle University - Dasmariñas.

	Text (Abstract) BIO 1137 2011.pdf Download (326kB)
	Text (Full text) LimVallester - SewageWaters.pdf Restricted to Registered users only Download (10MB)

Abstract

Blastocystis hominis, when released from infected individuals, can be present as intact cyst forms in fecally contaminated environmental waters. Sewage waters in four areas in Dasmarinas City, Cavite were investigated for the presence of Blastocystis hominis and the cyst forms retrieved were cultured to determine their viability. All four areas were noted as positive for B. hominis with vacuolar and granular forms of cyst being predominant. Moreover, the cysts were noted to be viable after culturing in a semisolid agar medium supplemented with 10% horse serum. Characteristic bi-convex shaped colonies within the agar and the flat, circular type of colonies in the agar-glass interface, contained the granular forms consistent with the previous findings concerning augmentation of Blastocystis hominis in samples. The presence of B. hominis was most abundant at remote sampling points in Dasmariñas Bagong Bayan – Area F (DBB-F), which is mainly residential, yet near commercial establishments. B. hominis from sampling points situated at Dasmariñas Bagong Bayan –Area B (DBBB), Brgy. Burol, and Town and Country Subd. were moderately abundant probably because sites are receiving effluent discharges from densely populated residential development and from a number of houses with septic tanks. The viability of the parasite establishes its potential to infect humans if ever potable water supply will be contaminated by sewage water. The findings have important implications for the possible waterborne transmission of B. hominis from the environment to human host.

Item Type:	Thesis (Undergraduate)
Additional Information:	CALL NUMBER : BIO 1137 2011
Keywords:	Blastocystis hominis.
Subjects:	Q Science > QH Natural history > QH301 Biology
Users:	College of Science and Computer Studies > Biological Science
Depositing User:	Ivyjoy Viray
Date Deposited:	25 Nov 2015 06:18
Last Modified:	29 Oct 2024 04:32
URI:	https://thesis.dlsud.edu.ph/id/eprint/846

Actions (login required)

View Item