SAO PAULO, May 20 (Reuters) - Brazilian farm and meat

lobbies on Monday revealed extensive losses of livestock from

floods in the state of Rio Grande do Sul, likely leading to

losses for farmers and processors and disruptions to meat

production in one of the world's biggest food exporters.

Hog farmers lost an estimated 12,600 head after floods

submerged entire towns in the state, Valdecir Folador, head of a

local hog producers lobby called ACSURS, said on Monday. He

noted some 30 farms were affected, including those of suppliers

to BRF and JBS.

The companies did not have an immediate comment.

ASGAV, a group representing local poultry processors and

farmers, calculated total losses related to the catastrophic

event at 182.9 million reais ($35.8 million), according to a

statement.

Torrential rains disrupted about 20 poultry farms and

flooded feed factories, ASGAV said.

An estimated 279,000 poultry destined for slaughtering died,

as well as 150,000 laying hens. Four meatpackers' plants were

halted, ASGAV's statement said without identifying any.

Rio Grande do Sul accounts for 24.24% of overall Brazilian

pork exports and for 16.23% of Brazil's chicken exports,

according to national industry lobby ABPA, which speaks on

behalf of the nation's biggest pork and chicken processors.

The port of Rio Grande, also disrupted by floods and

landslides that blocked roads and affected a rail link to its

terminals, ships nearly 9% of Brazil's overall pork exports and

6.33% of the country's chicken exports, according to ABPA data.

Folador said the total number of hogs on farms in Rio Grande

do Sul is around 5 million.

He pondered, however, whether there will be other indirect

losses to farmers and companies, especially because floods have

blocked roads and cut access to food and water supplies for some

days on certain properties.

According to Folador, lack of feed contributed to a

reduction of animal weight on farms where food had to be

rationed and female animals were nursing offspring.

Farmers supplying BRF's plant in the Lajeado area were among

the most affected by the floods, Folador said, estimating they

lost at least 60% of all hogs who died from the catastrophic

rains.

That plant can process 3,000 hogs per day, he noted.

($1 = 5.1048 reais)