This document discusses the microbiology of eggs and poultry. It notes that eggs can become contaminated during laying or handling, with pathogens like Salmonella. During storage, eggs undergo physical changes like weight loss and thinning of the white. Microbial spoilage is caused by bacteria like Pseudomonas and fungi. Various bacteria cause different colored rots in eggs. The document also discusses contamination sources for poultry and the bacteria that commonly cause spoilage, like Pseudomonas and yeasts. Finally, it mentions several preservation methods for eggs and poultry like heat, low temperatures, preservatives and irradiation.
Meat is one of the major food consumed in the temperate region of the world. Hence it is required to preserve meat from microbial spoilage in order to increase its shelf life, to facilitate long term transport and storage. The first step is to understand the process of meat spoilage, then study the effect of spoilage and finally to incorporate appropriate processing techniques to enhance the shelf life of meat, there by achieving customer satisfaction and also contributing towards food security.
Condensed milks are the products obtained by evaporating part of the water of whole milk, or fully or partly skimmed milk, with or with without the addition of sugar.
Meat is one of the major food consumed in the temperate region of the world. Hence it is required to preserve meat from microbial spoilage in order to increase its shelf life, to facilitate long term transport and storage. The first step is to understand the process of meat spoilage, then study the effect of spoilage and finally to incorporate appropriate processing techniques to enhance the shelf life of meat, there by achieving customer satisfaction and also contributing towards food security.
Condensed milks are the products obtained by evaporating part of the water of whole milk, or fully or partly skimmed milk, with or with without the addition of sugar.
Unit I General characteristics, classification and identification of yeasts, molds and group of bacteria important in food industry, sources of contaminations: air, water, sewage, post processing contamination. Factors influencing growth of microorganism on foods, Intrinsic factors and Extrinsic factors
Nosema bombycis is a microsporidium that kills all of the silkworms hatched from infected eggs and comes from the food that silkworms eat. ... Therefore, it is extremely important to rule out all eggs from infected moths by checking the moth's body fluid under a microscope.
Hamdard Laboratories (India), is a Unani pharmaceutical company in India (following the independence of India from Britain, "Hamdard" Unani branches were established in Bangladesh (erstwhile East Pakistan) and Pakistan). It was established in 1906 by Hakeem Hafiz Abdul Majeed in Delhi, and became
a waqf (non-profitable trust) in 1948. It is associated with Hamdard Foundation, a charitable educational trust.
Hamdard' is a compound word derived from Persian, which combines the words 'hum' (used in the sense of 'companion') and 'dard' (meaning 'pain'). 'Hamdard' thus means 'a companion in pain' and 'sympathizer in suffering'.
The goals of Hamdard were lofty; easing the suffering of the sick with healing herbs. With a simple tenet that no one has ever become poor by giving, Hakeem Abdul Majeed let the whole world find compassion in him.
They had always maintained that working in old, traditional ways would not be entirely fruitful. A broader outlook was essential for a continued and meaningful existence. their effective team at Hamdard helped the system gain its pride of place and thus they made an entry into an expansive world of discovery and research.
Hamdard Laboratories was founded in 1906 in Delhi by Hakeem Hafiz Abdul Majeed and Ansarullah Tabani, a Unani practitioner. The name Hamdard means "companion in suffering" in Urdu language.(itself borrowed from Persian) Hakim Hafiz Abdul Majeed was born in Pilibhit City UP, India in 1883 to Sheikh Rahim Bakhsh. He is said to have learnt the complete Quran Sharif by heart. He also studied the origin of Urdu and Persian languages. Subsequently, he acquired the highest degree in the unani system of medicine.
Hakim Hafiz Abdul Majeed got in touch with Hakim Zamal Khan, who had a keen interest in herbs and was famous for identifying medicinal plants. Having consulted with his wife, Abdul Majeed set up a herbal shop at Hauz Qazi in Delhi in 1906 and started to produce herbal medicine there. In 1920 the small herbal shop turned into a full-fledged production house.
Hamdard Foundation was created in 1964 to disburse the profits of the company to promote the interests of the society. All the profits of the company go to the foundation.
After Abdul Majeed's death, his son Hakeem Abdul Hameed took over the administration of Hamdard Laboratories at the age of fourteen.
Even with humble beginnings, the goals of Hamdard were lofty; easing the suffering of the sick with healing herbs. With a simple tenet that no one has ever become poor by giving, Hakeem Abdul Majeed let the whole world find compassion in him. Unfortunately, he passed away quite early but his wife, Rabia Begum, with the support of her son, Hakeem Abdul Hameed, not only kept the institution in existence but also expanded it. As he grew up, Hakeem Abdul Hameed took on all responsibilities. After helping with his younger brother's upbringing and education, he included him in running the institution. Both brothers Hakeem Abdul Hameed and Hakim Mohammed
Ang Chong Yi Navigating Singaporean Flavors: A Journey from Cultural Heritage...Ang Chong Yi
In the heart of Singapore, where tradition meets modernity, He embarks on a culinary adventure that transcends borders. His mission? Ang Chong Yi Exploring the Cultural Heritage and Identity in Singaporean Cuisine. To explore the rich tapestry of flavours that define Singaporean cuisine while embracing innovative plant-based approaches. Join us as we follow his footsteps through bustling markets, hidden hawker stalls, and vibrant street corners.
Vietnam Mushroom Market Growth, Demand and Challenges of the Key Industry Pla...IMARC Group
The Vietnam mushroom market size is projected to exhibit a growth rate (CAGR) of 6.52% during 2024-2032.
More Info:- https://www.imarcgroup.com/vietnam-mushroom-market
Roti Bank Hyderabad: A Beacon of Hope and NourishmentRoti Bank
One of the top cities of India, Hyderabad is the capital of Telangana and home to some of the biggest companies. But the other aspect of the city is a huge chunk of population that is even deprived of the food and shelter. There are many people in Hyderabad that are not having access to
2. Contamination
Most freshly laid eggs are sterile.
contaminated by
1. fecal matter from the hen,
2. the cage or nest,
3. wash water
4. handling
5. the material in which the eggs are
packed.
Salmonella sps may be on the shell or in
the egg as laid, build up during
3. Changes Not Caused by
Microorganisms
Untreated eggs lose moisture during storage and hence
lose weight.
The amount of shrinkage is shown to the candler by the
size of the air space or air cell.
The change in the physical state of the contents of the
egg, as shown by candling or by breaking out the egg.
As egg ages, the white of the egg becomes thinner and
more watery and the yolk membrane becomes weaker.
During storage, the alkalinity of the white of the egg
increases.
Any marked growth of the chick embryos in fertilized
eggs also serves to condemn the eggs.
4. Changes Caused by
Microorganisms
To cause spoilage of an undamaged
shell egg, the causal organisms must do
the following:
(1) contaminate the shell,
(2) penetrate the pores of the shell to the
shell membranes
(3) grow through the shell membranes to
reach the white
(4) grow in the egg white to reach the yolk,
Generally, more spoilage of eggs is
caused by bacteria than by molds.
5. Bacterial Spoilage of Eggs
I. Green rots
Caused chiefly by Pseudomonas fluorescens
Rot is so named because of the bright-green color
of the white during early stages of development.
Odor is lacking or is fruity or "sweetish.“
The contents of eggs so rotted fluoresce strongly
under ultraviolet light.
6.
7. 2. Colorless rots
Caused by Pseudomonas,
Acinetobacter, Alcaligenes, certain
coliform bacteria.
Detected by candling.
yolk usually disintegrates or at least
shows a white incrustation.
The odor varies from fruity to "highly
offfensive."
8. 3. Black rots
Most commonly caused by Pseudomonas,
Proteus & Aeromonas sps.
Proteus melanovogenes causes an
especially black coloration in the yolk and a
dark color in the white.
The odor is
putrid, with
hydrogen sulfide
evident, and gas
developed.
9. 4. Pink rot
Pink rots are caused by strains of
Pseudomonas.
They resemble the colorless rots,
except for a pinkish precipitate on the
yolk and a pink color in the white.
5. Red rots
Red rots caused by species of
Serratia.
Mild in odor.
10. Fungal Spoilage of Eggs
Fungal spoilage of egg follow the
stages namely,
1. Pin molding
2. Superficial fungal spoilage
3. Fungal rotting
4. Off flavor development
11. 1. Pin spot molding
Very early mold growth
It is termed pin-spot molding because of
the small, compact colonies of molds
appearing on the shell and usually just
inside it.
The color of these pin spots varies with
the kind of mold.
Penicillium sps cause yellow or blue or
green spots.
Cladosporium sps give dark-green or
black spots.
Sporotrichum sps produce pink spots.
12. II. Superficial fungal spoilage
In storage atmospheres of high humidity a
variety of molds may cause superficial
fungal spoilage,
First in the form of a fuzz or "whiskers"
covering the shell & later as more luxuriant
growth.
Molds causing spoilage of eggs include
species of Penicillium, Cladosporium,
Sporotrichum, Mucor, Thamniidium,
Botrytis, Alternaria, and other genera.
13. III. Fungal rotting
The final stage of spoilage by molds.
The mycelium of the mold has grown
through the pores or cracks in the egg.
Jellying of the white may result, and colored
rots may be produced.
The hyphae of the mold may weaken the
yolk membrane enough to cause its
rupture, after which the growth of the mold
is stimulated greatly by the food released
from the yolk.
14. IV. Off flavor
Off-flavours sometimes are developed in
eggs.
Mustiness may be caused by any of a
number of bacteria (Achromobacter,
Pseudomonas).
The growth of Streptomyces may produce
musty or earthy flavors that are absorbed by
the egg.
Molds growing in the shell also give musty
odors and tastes.
A hay odor is caused by Enterobacter
cloacae.
Fishy flavors are produced by Escherichia
15. Preservation
Use of low temperatures
(Chilling, freezing)
Preservation by drying
Use of preservatives
Use of Irradiation
Use of heat
17. Contamination
The skin of live birds may contain numbers of
bacteria.
other organisms from feet, feathers, and feces.
Contamination during washing, plucking, and
evisceration.
The types of organisms isolated depend on where
samples are taken and on the stage of processing.
Salmonella-positive birds is common and range
from 0 to 50 percent.
There is also a high incidence of Campylobacter
jejuni in poultry processing plants and on the
processed bird.
18. Spoilage
Bacteria are the chief cause of spoilage.
Intestines are primary source of these
organisms.
Eviscerated poultry held at 100 C or below is
spoiled mostly by Pseudomonas & yeasts, e.g.,
Torulopsis and Rhodotorula.
Above 100C, Microococci, Alcaligenes and
Flavobacterium grows.
Iced, cut-up poultry often develops a slime with
"tainted," "acid," "sour," or "dishraggy odor" by
species of Pseudomonas & Alcaligenes.
19. Preservation
Use of Heat
Use of low temperature
Use of Preservatives
Carbon dioxide Atmosphere
Use of Irradiation