Duckweed, A Useful Strategy for Feeding Chickens: Performance of Layers Fed with Sewage-Grown Lemnacea Species

Haustetn, A. T.; Gilman, R. H.; Skillicorn, P. W.; Vergara, V.; Guevara, V.; Gastañaduy, Arturo S.

doi:10.3382/ps.0691835

Cited by 46 publications

(34 citation statements)

References 8 publications

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“…Due to the lack of proper treatment of sewage water in developing countries, inadequately treated sewage water has been used/recycled directly or indirectly in agriculture and aquaculture (Carr et al 2004;Haustein et al 1990). Duckweed aquaculturebased sewage water treatment systems are becoming common practice in different Southeast Asian countries such as Thailand, Malaysia and Bangladesh (Alaerts et al 1996;Homsi and Reed 1988).…”

Section: Introductionmentioning

confidence: 99%

Prevalence and transmission of antimicrobial resistance among Aeromonas populations from a duckweed aquaculture based hospital sewage water recycling system in Bangladesh

Rahman¹,

Huys²,

Kühn³

et al. 2009

Antonie van Leeuwenhoek

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In order to investigate the influence of a duckweed aquaculture based hospital sewage water recycling plant on the prevalence and dissemination of antibiotic resistance, we made use of an existing collection of 1,315 Aeromonas isolates that were previously typed by the biochemical fingerprinting PhP-AE system. In these treatment plant, hospital raw sewage water is first collected in a settlement pond (referred to as sewage water in this study) and is then transferred to a lagoon, where the duckweed (Lemnaceae) is grown (referred to as lagoon). The duckweed is harvested and used as feed for the fish in a separate pond (referred to as fish pond). From this collection, representatives of 288 PhP types were subjected to antibiotic susceptibility testing for eight antimicrobials by broth microdilution method. The overall resistance rates among Aeromonas isolates from the treatment plant were highest for ampicillin (87%) and erythromycin (79%) followed by cephalothin (58%), nalidixic acid (52%), streptomycin (51%), tetracycline (31%), chloramphenicol (13%) and gentamicin (8%). A significantly lower prevalence of antibiotic resistance was found in Aeromonas from environmental control water, patient stool samples, duckweed and fish compared to sewage water isolates. The prevalence of resistance in the sewage water was not significantly reduced compared to the lagoon water and fish pond. Throughout the treatment system, the frequencies of resistant strains were found to diminish during the sewage water purification process, i.e. in the lagoon where sewage water is used to grow the duckweed. However, the frequency of resistant strains again increased in the fish pond where sewage grown duckweed is used for aquaculture. Among the selected isolates, two multiresistant clonal groups of Aeromonas caviae HG4 were identified that exhibited indistinguishable PhP and amplified fragment length polymorphism fingerprints and shared a common plasmid of approximately 5 kb. Representatives of both groups were recovered from almost every part of the sewage treatment plant but not in the control ponds nor in human samples, which suggests that specific multiresistant Aeromonas clones are able to persist and spread throughout the entire purification process.

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Section: Introductionmentioning

confidence: 99%

Prevalence and transmission of antimicrobial resistance among Aeromonas populations from a duckweed aquaculture based hospital sewage water recycling system in Bangladesh

Rahman¹,

Huys²,

Kühn³

et al. 2009

Antonie van Leeuwenhoek

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“…In this way, sewage water can be transferred into high-quality fish feed instead of being disposed of in the environment. The growing interest also seems to be due to the potential cost recovery through the use of duckweed as animal feed (13,35). However, sewage water recycling may constitute a health hazard, since sewage waters are known to be potential reservoirs of pathogenic and/or drug-resistant bacteria and other pathogenic organisms (5,28) that may persist in the sewage treatment system, be recycled through the reuse of treated sewage water, and possibly spread to humans through the food chain (23,40).…”

mentioning

confidence: 99%

Persistence, Transmission, and Virulence Characteristics of Aeromonas Strains in a Duckweed Aquaculture-Based Hospital Sewage Water Recycling Plant in Bangladesh

Rahman

Huys

Rahman

et al. 2007

Appl Environ Microbiol

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The persistence and transmission of Aeromonas in a duckweed aquaculture-based hospital sewage water treatment plant in Bangladesh was studied. A total of 670 samples from different sites of the hospital sewage water treatment plant, from feces of hospitalized children suffering from diarrhea, from environmental control ponds, and from feces of healthy humans were collected over a period of three years. In total, 1,315 presumptive Aeromonas isolates were biochemically typed by the PhenePlate rapid screening system (PhP-AE). A selection of 90 representative isolates was further analyzed with PhenePlate (PhP) extended typing (PhP-48), fatty acid methyl ester analysis, and amplified fragment length polymorphism (AFLP) fingerprinting. In addition, the prevalence of the putative virulence factors hemolysin and cytotoxin and the presence of the cytolytic enterotoxin gene (AHCYTOEN) were analyzed. Aeromonas was found at all sites of the treatment plant, in 40% of the samples from environmental control ponds, in 8.5% of the samples from hospitalized children suffering from diarrhea, and in 3.5% of samples from healthy humans. A significantly high number of Aeromonas bacteria was found in duckweed, which indicates that duckweed may serve as a reservoir for these bacteria. PhP-AE typing allowed identification of more than 192 distinct PhP types, of which 18 major PhP types (MTs) were found in multiple sites and during several occasions. AFLP fingerprinting revealed the prevalence of genotypically indistinguishable Aeromonas isolates among certain PhP MTs recovered from different sampling occasions and/or at multiple sites. Hemolytic and cytotoxic activities were observed in 43% of the tested strains, whereas 29% possessed the cytolytic enterotoxin gene AHCYTOEN. Collectively, two specific MTs associated with diarrhea were shown to exhibit high cytotoxicity. Furthermore, all tested isolates of these major types were positive for the cytolytic enterotoxin gene. In conclusion, our data indicate that certain phenotypically and genotypically stable clonal lineages of Aeromonas have persisted in the treatment system for a prolonged period and might spread from the hospitalized children suffering from diarrhea to fish produced for human consumption through the sewage water treatment system.

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“…These nutritional characteristics contrast with the compositions of many crops, such as soy beans, rice, and maize, whose biomass comprises approximately 50% residues that are high in fiber and low in digestibility. Duckweed grown on nutrient-rich water has a high concentration of trace minerals, potassium, phosphorus, nitrogen, fat, and pigments, particularly carotene and xanthophyll, which make duckweed meal a valuable dietary supplement (Culley and EPPA, 1973) for birds (chicken, duck) (Haustein et al, 1990(Haustein et al, , 1992(Haustein et al, , 1994. Based on these characteristics and applications of duckweed, the present study focuses on Jordan's irrigation ponds as a source of duckweed for several types of applications.…”

Section: Introductionmentioning

confidence: 97%

Water lentils (duckweed) in Jordan irrigation ponds as a natural water bioremediation agent and protein source for broilers

Shammout

Zakaria

2015

Ecological Engineering

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Duckweed, A Useful Strategy for Feeding Chickens: Performance of Layers Fed with Sewage-Grown Lemnacea Species

Cited by 46 publications

References 8 publications

Prevalence and transmission of antimicrobial resistance among Aeromonas populations from a duckweed aquaculture based hospital sewage water recycling system in Bangladesh

Prevalence and transmission of antimicrobial resistance among Aeromonas populations from a duckweed aquaculture based hospital sewage water recycling system in Bangladesh

Persistence, Transmission, and Virulence Characteristics of Aeromonas Strains in a Duckweed Aquaculture-Based Hospital Sewage Water Recycling Plant in Bangladesh

Water lentils (duckweed) in Jordan irrigation ponds as a natural water bioremediation agent and protein source for broilers

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