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The entire carcase
is condemned in one
case of the following
Types of T.B.
Localized T.B. with emaciation
(This mean that T.B. is the direct cause of
emaciation)
Generalized T.B.
(T...
The entire carcase, organs, viscera ,
should be condemned
such evidences are:
1-heavy miliary T.B. of both lungs:
Acute mi...
2-multiple and actively progressive
lesions of T.B.
Lesions of T.B. should multiple and actively Progressive
…..for total ...
3-wide spread infection of the
carcase L. ns
For T.C. of the carcase……..lesions in carcase L.ns
should be acute infiltrati...
4-diffuse acute lesions of both pleura and
peritoneum ass. with an enlarged or T.B.
carcase L.ns
Acute T.B. infection of p...
5-T.B lesions in the respiratory and
digestive tracts
where in addition to the presence of T.B lesions in
the respiratory ...
6-congenital T.B
congenital T.B………… followed haematogenous
spread………… Generalized nature.
Congenital T.B. spread via the f...
Differential diagnosis
A-Bacterial infection
1-Johne’s disease
Caused by an acid fast bacillus (Johne’s bacillus)
ccc. by ...
Differential diagnosis
2-actinomycosis or actinobacillosis
It is difficult to differentiate two conditions from T.B., if n...
Differential diagnosis
3-bacillary necrosis of the liver
ccc. by abcence of lesions from portal L.ns.
4-metastatic supurat...
Differential diagnosis
6-Brucella suis infection in pigs
Ccc. by originate in the inter –vertebral space
as sacro-lumber r...
Differential diagnosis
B-Parasitic affection
1-Degenerated cysts (Echinococci) :
Ccc. by caseous or gritty centers can be ...
Anthrax
It is septicaemic disease→ affect all animals +man
Infection most common among butcher →wounds or
abrasion →malign...
Actinobocillosis (wooden- tongue(
*it caused by Actinobocillus lignieresi bacteria
*lesions are most common in tongue and
...
Actionmycosis (lumpy Jaw(
*Caused by Ray fungus (Actinomycis bovis) →in
cattle →Lumpy Jaw In pigs →chronic mastitis in
saw...
Caseous lymphedenitis
Chronic disease of sheep →caused by corynebactrium-
pseudo tuberculosis .
*Ccc. by Caseous purulent ...
Contagions bovine pleuro-
pneumonia
*It is a contagious disease the of cattle →Sudanese
breeds
*Ccc .by chronic inflammati...
Foot and mouth disease
(aphthus fever(
It is in acute and highly contagious disease of cloven
animals
Disease →trans .to m...
Foot and mouth disease
(aphthus fever(
Judgment :
*if there is no fever→ condemn the head, stomach,
intestines, lungs, udd...
Rinder pest
Cattle plague is an acute febrile infectious dis.→ cattle
and may be buffaloes ,sheep and goats.
The virus fou...
Rabies
It is a dis. of dogs can infect other animals via biting
Judgment
 Rabies not transmission to man through consumpt...
Haemorrhagic septicaemia
It is an infectious and very fatal disease of cattle and
buffalo and may be Pigs and sheep
Judgme...
Brucellosis
It is cause contagious abortion → in cattle
Infectious abortion → in goat and saw
Brucella suis
Organism in sw...
Brucellosis
Br. abortus (undulant fever)→ brucellosis in man
Ccc. by fever with recurrent irregular temperature
infection ...
Brucellosis
Br. meletensis
Highly infective to man via consumption of goat milk or
products
Air –borne infection from faec...
Brucellosis
Judgment
Brucella→ easily destroyed by lactic acid still viable for
a short time in the muscles
Brucella can r...
Pox (variola(
*the term variola applied to a class of contagious
diseases.
It is ccc. by fever and vesico-pustular lesions...
Tetanus (lock jaw(
*It is an acute dis. caused by clostridium tetani
(anaerobic spore forming bacillus)
Judgment
Affected ...
Rift vally fever (RVF(
RVF or enzootic hepatitis is an acute arthropod born
viral disease that affect several species of a...
Rift vally fever (RVF(
The most consistent clinical sing in adult animals is
abortion.
In Egypt causing extensive morbidit...
Rift vally fever (RVF(
*In natural infection, the blood as well as the liver and
spleen contained the virus at the time of...
Lecturer 12
Lecturer 12
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Lecturer 12

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محاضرات اليوم الاول من المحاضرات التأهيلية لاختبارات الوظائف الحكومية

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Lecturer 12

  1. 1. The entire carcase is condemned in one case of the following
  2. 2. Types of T.B. Localized T.B. with emaciation (This mean that T.B. is the direct cause of emaciation) Generalized T.B. (T.B. is said to be generalized when there is evidence of recent invasion of the arterial blood )
  3. 3. The entire carcase, organs, viscera , should be condemned such evidences are: 1-heavy miliary T.B. of both lungs: Acute military T.B. mean heavy invasion of blood stream with tubercle bacilli occur in *Early generalization during primary infection. *Acute late generalization. In such case . miliary T.B. not only found in lungs but also found in kidney ,spleen……etc The affected lungs are oedematus and emphyse- matous with infection in apical L.n. the miliary T.B .found on the surface, In lung tissues and beneath the visceral pleura.
  4. 4. 2-multiple and actively progressive lesions of T.B. Lesions of T.B. should multiple and actively Progressive …..for total Condemnation……..This assumed If:  a) There is a congestion in the surrounding tissues  b) The regional L.ns……. enlarged and oedematous  c) An older caseous focus………… surrounded with several small millet –sized lesions  d) Breakdown lesions are dotted with small haemorrhages with enlarged L.n w has either miliary T.B. or stellate radiation
  5. 5. 3-wide spread infection of the carcase L. ns For T.C. of the carcase……..lesions in carcase L.ns should be acute infiltrative and caseous in nature this mean that T.B. present in blood and muscles If lesions are chronic…. encapsulation and calcification, this indicate absence of bacilli from the muscles. For T.C. of carcase there must be  a)2 or more carcase L.ns. have T.B.  b) 2 or more carcase L.ns not confined to thoracic or abdominal cavity.  c) Lesions are acute.
  6. 6. 4-diffuse acute lesions of both pleura and peritoneum ass. with an enlarged or T.B. carcase L.ns Acute T.B. infection of pleura & peritoneum……red velvety granulation. Although in most cases, the condition is not caused by a haemotagenous spread. This condition become active ,if ass. with the presence of bacilli in the muscles. Chronic lesions……..pearly from( less important) …….. muscles are free form T.B.
  7. 7. 5-T.B lesions in the respiratory and digestive tracts where in addition to the presence of T.B lesions in the respiratory and digestive tracts . There are also active lesions in the substance of any two of the following spleen, kidney, udder, uterus, ovary, testicle, brain ,spinal cord or other membranes. For T.C. of carcase T.B. should be present in both respiratory and digestive tracts together with acute or recent lesions in 2of the said organs. *If the lesions are acute or recent……..condemned the carecase. *If the lesions are chronic………..condemned the affected organs or parts…….. pass the carcase.
  8. 8. 6-congenital T.B congenital T.B………… followed haematogenous spread………… Generalized nature. Congenital T.B. spread via the faetus from primary infect. Of faetal liver by blood stream Lymph nodes are enlarged +caseated with out formation of T.B. nodules. Liver infect … peritoneum by lymmphatics on post aspect Diaphragm infect by…… the thoracic cavity give….. lesions In post mediastinal L.ns ,brsnchial L.ns ,lungs and rarely pleura The affection to be congenital, there must be 1- lesions with out calcification in splenic substance, liver, kidney and parotid L.n. 2- the age of the calf less than 14 days.
  9. 9. Differential diagnosis A-Bacterial infection 1-Johne’s disease Caused by an acid fast bacillus (Johne’s bacillus) ccc. by much thickening and corragation of the intestinal mucous membrane The condition is locally confined to the affected intestine and mesenteric l.ns with out purulent or caseous foci Johne’s bacillus can not inoculated into G. pig or rabbits and vica versa in T.B
  10. 10. Differential diagnosis 2-actinomycosis or actinobacillosis It is difficult to differentiate two conditions from T.B., if no lesions in tongue or maxilla. Early lesions appear as shot like ,glistening hard projecting nodules at the prephary of the node L.ns are firmer…………. white fibrous C.T. Microscopic examination………. Actinobac. Ligner. ……… Actinomyces bovis.
  11. 11. Differential diagnosis 3-bacillary necrosis of the liver ccc. by abcence of lesions from portal L.ns. 4-metastatic supurative foci in the organ s due to pyaemia *ccc. by absence of caseation and caseation and calcification *absence of T.B lesion in L.n & presence of pyaemic symptoms 5-corynebacterium infection in pigs *T.B like changes in the submaxillry L.n of pig *Lesions appear as small yellow, necrotic foci surrounded by C.T. The affection is caused by corynebacterium equi Judgment ………….remove the affected L.n. only
  12. 12. Differential diagnosis 6-Brucella suis infection in pigs Ccc. by originate in the inter –vertebral space as sacro-lumber regions and extend to bodies of the vertebrae Rarely occur in the carcase l.ns There is no involvement of the visceral organs 7-nodular necrosis Cheesy necrotic foci in superficial muscle, specially tail it does not involve the viscera and l.ns T.B. is rarely in muscles
  13. 13. Differential diagnosis B-Parasitic affection 1-Degenerated cysts (Echinococci) : Ccc. by caseous or gritty centers can be easily squeezed out leaving intact cyst L.ns are free from any lesions Microscopically examamination…………. hooklets 2-linguatula Larvae found in l.n with greenish degenerated mass
  14. 14. Anthrax It is septicaemic disease→ affect all animals +man Infection most common among butcher →wounds or abrasion →malignant pastille red swollen finger or →by inhalation →wool sorter’s disease. Judgment: *all infected animals or suspected one →destroyed at six feet deep →burning or burial *condemn the hides, fat, blood and internal organs *condemn the other carcases slaughtered in same hall
  15. 15. Actinobocillosis (wooden- tongue( *it caused by Actinobocillus lignieresi bacteria *lesions are most common in tongue and muscles of the jaw appear as fibrous tumors with purulent foci. Judgment: *the man →cannot infected via meat. *condemn the effected organs → head ,stomach or liver.
  16. 16. Actionmycosis (lumpy Jaw( *Caused by Ray fungus (Actinomycis bovis) →in cattle →Lumpy Jaw In pigs →chronic mastitis in saws *The man can acquired infection from same sources in nature that animals acquire it →not from meat ,accidental , inoculation or animals Judgment In cattle→ condemn the affected organs In saws → condemn the affected portion of mammary gland
  17. 17. Caseous lymphedenitis Chronic disease of sheep →caused by corynebactrium- pseudo tuberculosis . *Ccc. by Caseous purulent foci →in organs & L.ns Judgment : *condemn the affected parts *Condemn whole carcass if generalized or associated with emaciation
  18. 18. Contagions bovine pleuro- pneumonia *It is a contagious disease the of cattle →Sudanese breeds *Ccc .by chronic inflammation of the lungs and pleura . The lung undergo necrosis and encapsulation but without gangrene Judgment *condemn the affected lung. *Total condemnation of the carcase → if associated with fever
  19. 19. Foot and mouth disease (aphthus fever( It is in acute and highly contagious disease of cloven animals Disease →trans .to man through consumption of milk and milk product but not through consumption of meat Due to a powerful destroying effect of lactic acid on the virus The disease →common among butcher through wounds or abrasions of their hands → during slaughter or skinning
  20. 20. Foot and mouth disease (aphthus fever( Judgment : *if there is no fever→ condemn the head, stomach, intestines, lungs, udder and feets. *The carcase should be passed after 24hrs. *Peracute cases → may be passed for food if well bled In spreading the disease by but danger bone marrow or other infected tissues. Can persist in bone marrow for months
  21. 21. Rinder pest Cattle plague is an acute febrile infectious dis.→ cattle and may be buffaloes ,sheep and goats. The virus found in blood ,muscles and organs during the course of the disease. Judgment  The flesh of infected cattle is harm less to man after 6 days while in bone marrow after 1month.  The affected carcase should be condemn due to fever ,emaciation, spread the disease among other animals
  22. 22. Rabies It is a dis. of dogs can infect other animals via biting Judgment  Rabies not transmission to man through consumption of meat. The transmission to man occur by inoculation during handling of meat.  Animal without symptoms.→ harmless → pass for consumption and condemn nerves connected with udder, pancreas, C.N.S., salivary gland bite.  Animal with symptoms. → condemn the whole carcase
  23. 23. Haemorrhagic septicaemia It is an infectious and very fatal disease of cattle and buffalo and may be Pigs and sheep Judgment  The disease not transmitted → to man  But animal infected with disease should be condemned.
  24. 24. Brucellosis It is cause contagious abortion → in cattle Infectious abortion → in goat and saw Brucella suis Organism in swine give rise to lesions in vertebra and joints and bursae like T.B. In spleen form chronic nodular formation up to1/6 inch in size have yellowish white contents may be tinged with light green
  25. 25. Brucellosis Br. abortus (undulant fever)→ brucellosis in man Ccc. by fever with recurrent irregular temperature infection → occur by drinking milk or inoculation via handing of infected meat or animals Does not occur through → consumption the meat of infected animals
  26. 26. Brucellosis Br. meletensis Highly infective to man via consumption of goat milk or products Air –borne infection from faeces, dust Via contact with infected flocks Br. meletensis and Br. Suis are more pathogenic for man than Br. Abortus
  27. 27. Brucellosis Judgment Brucella→ easily destroyed by lactic acid still viable for a short time in the muscles Brucella can resist the refrigeration for excess one month Can resist the pickling and inadequate souking Carcase affected with brucella pass for consumption after condemnation of lungs ,liver, spleen, kidney, intestine, udder, blood and carcase L.ns Carcase affected with localized lesions of brucellosis Passed after remove and condemn the affected parts
  28. 28. Pox (variola( *the term variola applied to a class of contagious diseases. It is ccc. by fever and vesico-pustular lesions The blood and lymph are not virulent unless they are taken from lesions. By direct inoculation to man → vaccine Judgment If carcase slaughtered during develop of pox condemn If temperature of animal returned to normal+ pox are healed carcase may pass for food
  29. 29. Tetanus (lock jaw( *It is an acute dis. caused by clostridium tetani (anaerobic spore forming bacillus) Judgment Affected carcase cond. although there are no danger in cating or handling of infected meat but carcase are badly bled setting rapidly putrefied. *Swine diseases Swine erysipelas + swine fever *Calf diseases Calf paratyphoid Calf dysentery Calf Diphtheria
  30. 30. Rift vally fever (RVF( RVF or enzootic hepatitis is an acute arthropod born viral disease that affect several species of animals mainly sheep, cattle and goats The disease is caused by an arbo virus of the phlebotomus fever group The disease was investigated among sheep of the rift vally of Kenya. the virus produces 70-100%mortaqlity in calves and lambs of less than 7 days of old age but only 10-20% in adult animals
  31. 31. Rift vally fever (RVF( The most consistent clinical sing in adult animals is abortion. In Egypt causing extensive morbidity and mortality in humans and domestic animals. Humans become infected especially by contact with infected animals and carcases. In some severely affected areas about70% of the human population wear infected with signs of encephalitis, blindness and hemorrhagic fever at least about 200.000clinical cases showed the symptoms amongst them 600 deaths occurred.
  32. 32. Rift vally fever (RVF( *In natural infection, the blood as well as the liver and spleen contained the virus at the time of fever or death *Also the only sign of the disease in many ewes is abortion *The primary lesion in RVF is focal hepatic necrosis Judgment Total condemnation of RVF carcase.

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