Ho Chau - Academia.edu (original) (raw)
Papers by Ho Chau
Advances in Animal and Veterinary Sciences, 2021
Journal of Food and Nutrition Research, Nov 18, 2014
This study was conducted to evaluate microbial and parasitic contamination in twelve types of pop... more This study was conducted to evaluate microbial and parasitic contamination in twelve types of popular vegetables in Hue city. A total of 108 vegetable samples, equal numbers of young mustard greens, celery, amaranth, cilantro, water spinach, rice paddy herb, Vietnamese cilantro, basil, centella, lettuce, watercress, and iceberg lettuce were collected from three traditional markets in Hue city. All of samples were tested for total aerobic bacteria counts and E. coli by traditional culture-based methods. The Salmonella and parasites on the vegetables were detected by PCR technique and microscopic methods, respectively. All samples were highly contaminated with aerobic bacteria and E. coli. The aerobic bacteria counts ranged from 6.84 to 8.40 log CFU/g. Escherichia coli levels ranged from 5.47-6.88 log CFU/g. Salmonella was detected in 19/108 of test samples. Water spinach was found to have the highest contamination prevalence with Salmonella (55.56%). Contamination by multiple parasites was detected in all vegetable samples. The contamination rates of Fasciola, Ascaris, Trichuris and Clonorchis sinensis eggs were 83.33%, 85.19%, 64.81% and 16.67%, respectively. The oocysts of Cryptosporidium, Isospora and Cyclospora were found on the samples at rates of 47.22%, 27.78% and 27.78%, respectively. These bacteria and parasites may become potential sources of cross contamination and pose a serious risk to human health.
Journal of Food and Nutrition Research, 2014
This study was conducted to evaluate microbial and parasitic contamination in twelve types of pop... more This study was conducted to evaluate microbial and parasitic contamination in twelve types of popular vegetables in Hue city. A total of 108 vegetable samples, equal numbers of young mustard greens, celery, amaranth, cilantro, water spinach, rice paddy herb, Vietnamese cilantro, basil, centella, lettuce, watercress, and iceberg lettuce were collected from three traditional markets in Hue city. All of samples were tested for total aerobic bacteria counts and E. coli by traditional culture-based methods. The Salmonella and parasites on the vegetables were detected by PCR technique and microscopic methods, respectively. All samples were highly contaminated with aerobic bacteria and E. coli. The aerobic bacteria counts ranged from 6.84 to 8.40 log CFU/g. Escherichia coli levels ranged from 5.47-6.88 log CFU/g. Salmonella was detected in 19/108 of test samples. Water spinach was found to have the highest contamination prevalence with Salmonella (55.56%). Contamination by multiple parasites was detected in all vegetable samples. The contamination rates of Fasciola, Ascaris, Trichuris and Clonorchis sinensis eggs were 83.33%, 85.19%, 64.81% and 16.67%, respectively. The oocysts of Cryptosporidium, Isospora and Cyclospora were found on the samples at rates of 47.22%, 27.78% and 27.78%, respectively. These bacteria and parasites may become potential sources of cross contamination and pose a serious risk to human health.
Journal of Agricultural Science and Technology A, Dec 28, 2015
The aim of this study was to determine the standardized ileal digestibility of amino acids in six... more The aim of this study was to determine the standardized ileal digestibility of amino acids in six by-product ingredients for broiler, i.e., copra meal, rapeseed meal, feather meal, hydrolyzed poultry meal, meat and bone meal, and shrimp head meal. Luong Phuong chickens at 35 d of age were used in the trials. Dietary protein in all assay diets was supplied solely by the test ingredient. In the case of protein-rich ingredients, dextrose was added to assay diets to obtain 20% of crude protein. Standardized ileal amino acid digestibilities were calculated by correcting the apparent ileal digestibility coefficients by basal endogenous amino acid losses. Results of study showed that the variation in ileal digestibility coefficients of amino acids was low in rapeseed meal and high in copra meal. Among animal protein meals, the lowest variation of digestibility among amino acids was observed in shrimp head meal. The high standardized ileal digestibilities of Arg, His, Leu + Ile, Thr, Trp, Val, and Phe were observed in hydrolyzed poultry meal and shrimp head meal. Meanwhile, the standardized ileal digestibility values of Lys, Thr and Trp in feather meal were very low. Meat and bone meal and feather meal were the two least digestible amino acid ingredients.
Advances in Animal and Veterinary Sciences, 2021
Journal of Food and Nutrition Research, Nov 18, 2014
This study was conducted to evaluate microbial and parasitic contamination in twelve types of pop... more This study was conducted to evaluate microbial and parasitic contamination in twelve types of popular vegetables in Hue city. A total of 108 vegetable samples, equal numbers of young mustard greens, celery, amaranth, cilantro, water spinach, rice paddy herb, Vietnamese cilantro, basil, centella, lettuce, watercress, and iceberg lettuce were collected from three traditional markets in Hue city. All of samples were tested for total aerobic bacteria counts and E. coli by traditional culture-based methods. The Salmonella and parasites on the vegetables were detected by PCR technique and microscopic methods, respectively. All samples were highly contaminated with aerobic bacteria and E. coli. The aerobic bacteria counts ranged from 6.84 to 8.40 log CFU/g. Escherichia coli levels ranged from 5.47-6.88 log CFU/g. Salmonella was detected in 19/108 of test samples. Water spinach was found to have the highest contamination prevalence with Salmonella (55.56%). Contamination by multiple parasites was detected in all vegetable samples. The contamination rates of Fasciola, Ascaris, Trichuris and Clonorchis sinensis eggs were 83.33%, 85.19%, 64.81% and 16.67%, respectively. The oocysts of Cryptosporidium, Isospora and Cyclospora were found on the samples at rates of 47.22%, 27.78% and 27.78%, respectively. These bacteria and parasites may become potential sources of cross contamination and pose a serious risk to human health.
Journal of Food and Nutrition Research, 2014
This study was conducted to evaluate microbial and parasitic contamination in twelve types of pop... more This study was conducted to evaluate microbial and parasitic contamination in twelve types of popular vegetables in Hue city. A total of 108 vegetable samples, equal numbers of young mustard greens, celery, amaranth, cilantro, water spinach, rice paddy herb, Vietnamese cilantro, basil, centella, lettuce, watercress, and iceberg lettuce were collected from three traditional markets in Hue city. All of samples were tested for total aerobic bacteria counts and E. coli by traditional culture-based methods. The Salmonella and parasites on the vegetables were detected by PCR technique and microscopic methods, respectively. All samples were highly contaminated with aerobic bacteria and E. coli. The aerobic bacteria counts ranged from 6.84 to 8.40 log CFU/g. Escherichia coli levels ranged from 5.47-6.88 log CFU/g. Salmonella was detected in 19/108 of test samples. Water spinach was found to have the highest contamination prevalence with Salmonella (55.56%). Contamination by multiple parasites was detected in all vegetable samples. The contamination rates of Fasciola, Ascaris, Trichuris and Clonorchis sinensis eggs were 83.33%, 85.19%, 64.81% and 16.67%, respectively. The oocysts of Cryptosporidium, Isospora and Cyclospora were found on the samples at rates of 47.22%, 27.78% and 27.78%, respectively. These bacteria and parasites may become potential sources of cross contamination and pose a serious risk to human health.
Journal of Agricultural Science and Technology A, Dec 28, 2015
The aim of this study was to determine the standardized ileal digestibility of amino acids in six... more The aim of this study was to determine the standardized ileal digestibility of amino acids in six by-product ingredients for broiler, i.e., copra meal, rapeseed meal, feather meal, hydrolyzed poultry meal, meat and bone meal, and shrimp head meal. Luong Phuong chickens at 35 d of age were used in the trials. Dietary protein in all assay diets was supplied solely by the test ingredient. In the case of protein-rich ingredients, dextrose was added to assay diets to obtain 20% of crude protein. Standardized ileal amino acid digestibilities were calculated by correcting the apparent ileal digestibility coefficients by basal endogenous amino acid losses. Results of study showed that the variation in ileal digestibility coefficients of amino acids was low in rapeseed meal and high in copra meal. Among animal protein meals, the lowest variation of digestibility among amino acids was observed in shrimp head meal. The high standardized ileal digestibilities of Arg, His, Leu + Ile, Thr, Trp, Val, and Phe were observed in hydrolyzed poultry meal and shrimp head meal. Meanwhile, the standardized ileal digestibility values of Lys, Thr and Trp in feather meal were very low. Meat and bone meal and feather meal were the two least digestible amino acid ingredients.