VPH- Midterm 3

kelseyfmeyer's version from 2015-09-27 20:55

Post-mortem inspection (most important part of meat hygiene!)

Question Answer
when do you Make a disposition on food for human consumption?POST MORTEM (Take into account findings at AM inspection if provided.)
Five principles must be considered in making a final disposition..what are they?(1) Removal and condemnation of diseased or abnormal tissue (2) Concept of localized versus generalized and acute versus chronic (3) Derangement of body functions (4) Injurious to health of consumer (5) Offensive and repugnant. Examples are malignant lymphoma and eosinophilic myositis
you determine systemic involvement by what two parameters? (1) the Lymphatic or Circulatory system (2) acute vs chronic
Carcass disposition depends on severity of abscessation--> explain what you'd do with localized abscesses and what you'd do with Multiple lesions in multiple organs abcesssatin?local: trim away bad portion. generalized: condem
which type of dz is usually generalized-- acute or chronic?Acute lesions often generalized because of the body's inability to limit the infection.
Acute lesions often generalized because of the body's inability to limit the infection...what are some examples of dzs which are acute and infectious?anthrax, septicemias, pyemias, toxemias and viremias
what is septicemia, is it usually local or generalized, acute or chronic?acute, generalized, it is the State of an advanced generalized [systemic] disease process
principals--> derangement of body functions--> 4 major examples of this?(1) uremia (due to obstructive urinary calculi.) (2) Icterus (impaired liver fxn) (3) generalized edema (CHF) (4) emaciation ( Acetonaemic scent to meat)
why is urinary calculi often a cause of condemning whole carcass unfit for human food?(derangement of bodily functions) common in males- obstruction of urethra can cause rupture of the urinary bladder leading to infiltration of urine into the tissues and the production of a uremic odor to the carcass when the abdominal cavity is opened.
why does icterus mean carcass is unfit for human consumption?bile duct obstruction, or liver flukes, or generalized dz can be indicated by this
ddx for icterushigh corn diets or gurnsey/jersy cows which normally look like their fat is yellow
PHV may suspect presence of residues in the animal carcass/parts, in-plant screening tests can be used. what are two of these?(1) Fast Antimicrobial Screen Test [FAST] (2) Kidney Inhibition Swab [KIS]
Fast Antimicrobial Screen Test--> explain thistissue fluid from kidney is placed on a plate with a harmless bacteria--> if there is abx residues in the tissues there will be a zone of inhibition around the tissue fluid that was placed there, in which case PHV is to continue to retain the carcass and parts and submit appropriate tissue samples (liver, kidney, and muscle tissue) for further testing at the appropriate FSIS Laboratory
When an illegal residue is detected FSIS, what three things happen?(1) FSIS reports the violation to FDA’s CVM (2) FSIS notifies producers when they have exceeded the tolerances and tests animals from subsequent flocks or herds to ensure the particular farm remains below legally permissible levels (3) FDA continues the investigation on the indicted farm.
If the owner of a farm slaughtered or custom slaughtered animal has insisted upon eating the meat from an animal in which proper drug withdrawal periods were not observed, and wont not eat it, what do you recc?discard the liver and kidneys, liberally excise the injection site area and discard and do not serve to family members and/or guests that are known to be allergic or sensitive to the particular antibiotic(s).
examples of offensive or repungent meatsmalignant lymphoma (aesthetic reasons), Eosinophilic myositis(aesthetic- if localized, trim and rest is fine), liver flukes, liver abscesses, White spotty livers in pigs, Muscular haemorrhage or ”‘Blood splash”, ketosis, milk fever, swine Erysipelas
localized liver abscesses (usually from dec pH bc being fattened, rumen damage, blood carries fusobacterium to liver where it absscesssates)--> what do?In the absence of additional post-mortem findings coupled with the history of good health, condemn liver and rest is fine
white spotty liver in pig- when is this good to just get rid of liver, when is the carcass condemned?if just liver affected, can condemn liver (if liver damage super slight, can trim that and liver still fit) but if the ascaris suum causing this occlude bile duct and meat is icteric, then CONDEMN CARCASS because icterus is a no go
can you pass a carcass with widespread skin lesions of erysipelas?no, nor ones with systemic involvement
when can you pass a carcass with erysipelas?(NOT widespread skin lesions or systemic involvement-- zoonotic, but if small areas affected or localized to arthritic joints, remove these areas and rest of carcass can pass)
three options for disposition at PM(1) pass for food (2) condemn all or part (trim) (3) pass with restriction

Poultry inspection

Question Answer
how are ratites classified?red meat (pH similar to beef)
4 major differences between poultry and red meat inspection?(1) Ante-mortem bird-by-bird inspection not feasible so birds inspected by truckload (2) An official U.S. suspect pen is not reqd for poultry antemortem inspection (3) Rectal temp. not reqd. poultry inspection (4) Observation of humane slaughter not legal reqd. for poultry
some symptoms of dz you'd see ante-mortem in poultrySwelling around the head and eyes, Oedema of the wattles, Gasping and sneezing [respiratory], Abnormal colour or consistency of stool, Skin lesions; dermatitis, Lameness; joint lesions, Emaciation, Torticollis or wry neck -head is tilted toward one side
list of diseases /conditions in poultry that warrant the appropriate postmortem dispositionResidues, TB, leukosis, neoplasia, septicemia, airsacculitis, contamination, bruises, synovitis, cadaver, overscald, parasites, missing viscera
three options if there are biological residues in the poultry1. Such poultry may be returned to the grower 2. The operator of the establishment and FSIS inspector / PHV opt to process the carcasses and all parts thereof retained for disposition /in-plant screening /analysis of the residue. 3. MORE COMMONLY…they are slaughtered at the establishment and buried or incinerated
what do if poultry has TB lesions? (what is the lesion?)lesion is miliary nodule in liver, maybe also intestines and bones. Carcasses affected with tuberculosis are condemned. One definitive lesion is all that is required to condemn a poultry carcass for tuberculosis
leukosis usually means one of what two things, what do you do if evidence of leukosis?mareks, lymphoid leukosis--> condemn (aesthetic)
what's the rule of thumb if you see tumor(s)? (not leukosis tho)1 tumor- trim and pass. 2 or more- condemn
septicemia--> any sign of systemic involvement is reason for condemnation. some signs would be..Dehydration, Color changes - of skin, liver and other parts., Hemorrhages, hepatomegaly, splenomegaly, necrotic areas, emaciation
carcasses are condemned for airsaculitis if (3)(1) airsacculitis is extensive (2) exudate cannot be effectively removed (3) if airsacculitis occurs + systemic change[Pneumonia, pericarditis, perihepatitis might be present].
when does "contamination" of a carcass merit condemnation?Carcasses so contaminated they cannot be inspected, contaminated with bile or feces to the extent that the inspector cannot determine if carcass is wholesome, Those that fall into open sewers/evisceration troughs
what do you do about bruises?slight/localized bruise-- trim and pass. whole carcass involvement--> condemnation
would you condemn a synovitis carcass?A carcass with synovitis is not condemned unless it also shows systemic
incompletely bleed out leads to condemnation of cadaver. 2 reasons?(1) dead birds inadvertently hung on line in live area or (2) birds whose throat was not cut. The cherry red color of the carcass is characteristic. Cadavers are condemned
what do you do with overscald, and what is the criteria to determine it's overscalded?The muscle must be cooked through the level of the deep pectoral muscle > breast muscle with a very cooked appearance--> CONDEMN
parasites- condemnyay
missing viscera- condemn. What three organs would be missing to consititute thisif any of the three major organs- heart, liver, and spleen- are not presented for inspection with the corresponding bird from which it came.

Microbial, Parasitic agents of Animal origin implicated in Human Foodborne illness

Question Answer
USDA Recommended Safe Minimum Internal Temperatures--> STEAKS AND ROASTS145
USDA Recommended Safe Minimum Internal Temperatures--> FISH145
USDA Recommended Safe Minimum Internal Temperatures--> pork160
USDA Recommended Safe Minimum Internal Temperatures--> ground beef160
USDA Recommended Safe Minimum Internal Temperatures--> egg dishes160
USDA Recommended Safe Minimum Internal Temperatures--> chicken breasts165
USDA Recommended Safe Minimum Internal Temperatures--> whole poultry165